gsm->num is the index of gsm_mux[], it's invalid before calling gsm_activate_mux.
Signed-off-by: xinhui.pan <xinhuiX.pan@intel.com>
Acked-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Current code allocates too much data for tty_groups member of uart_port struct,
so fix it.
Signed-off-by: Yoshihiro YUNOMAE <yoshihiro.yunomae.ez@hitachi.com>
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Reviewed-by: Daniel Thompson <daniel.thompson@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Commit 3d1c90d48c ("serial: altera_jtaguart: Adpot
uart_console_write()") introduced the usage of uart_console_write() but
didn't change the signature of altera_jtaguart_console_putc() to take a
pointer to struct uart_port instead of struct console, breaking the
driver's console support and leading to the following warning:
> drivers/tty/serial/altera_jtaguart.c: In function 'altera_jtaguart_console_write':
> >> drivers/tty/serial/altera_jtaguart.c:350:2: warning: passing argument 4 of 'uart_console_write' from incompatible pointer type [enabled by default]
> uart_console_write(port, s, count, altera_jtaguart_console_putc);
> ^
> In file included from drivers/tty/serial/altera_jtaguart.c:25:0:
> include/linux/serial_core.h:317:6: note: expected 'void (*)(struct uart_port *, int)' but argument is of type 'void (*)(struct console *, int)'
> void uart_console_write(struct uart_port *port, const char *s,
Fix this by adjusting the signature of altera_jtaguart_console_putc()
accordingly.
Reported-by: kbuild test robot <fengguang.wu@intel.com>
Reported-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
All Samsung platforms are now using the Common Clock Framework and the
legacy clock code is being removed, so remove related dead code from
samsung-serial driver as well.
Reported-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Tomasz Figa <t.figa@samsung.com>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
Add tunable RX interrupt trigger I/F of FIFO buffers.
Serial devices are used as not only message communication devices but control
or sending communication devices. For the latter uses, normally small data
will be exchanged, so user applications want to receive data unit as soon as
possible for real-time tendency. If we have a sensor which sends a 1 byte data
each time and must control a device based on the sensor feedback, the RX
interrupt should be triggered for each data.
According to HW specification of serial UART devices, RX interrupt trigger
can be changed, but the trigger is hard-coded. For example, RX interrupt trigger
in 16550A can be set to 1, 4, 8, or 14 bytes for HW, but current driver sets
the trigger to only 8bytes.
This patch makes some devices change RX interrupt trigger from userland.
<How to use>
- Read current setting
# cat /sys/class/tty/ttyS0/rx_trig_bytes
8
- Write user setting
# echo 1 > /sys/class/tty/ttyS0/rx_trig_bytes
# cat /sys/class/tty/ttyS0/rx_trig_bytes
1
<Support uart devices>
- 16550A and Tegra (1, 4, 8, or 14 bytes)
- 16650V2 (8, 16, 24, or 28 bytes)
- 16654 (8, 16, 56, or 60 bytes)
- 16750 (1, 16, 32, or 56 bytes)
<Change log>
Changes in V9:
- Use attr_group instead of dev_spec_attr_group of uart_port structure
Changes in V8:
- Divide this patch from V7's patch based on Greg's comment
Changes in V7:
- Add Documentation
- Change I/F name from rx_int_trig to rx_trig_bytes because the name
rx_int_trig is hard to understand how users specify the value
Changes in V6:
- Move FCR_RX_TRIG_* definition in 8250.h to include/uapi/linux/serial_reg.h,
rename those to UART_FCR_R_TRIG_*, and use UART_FCR_TRIGGER_MASK to
UART_FCR_R_TRIG_BITS()
- Change following function names:
convert_fcr2val() => fcr_get_rxtrig_bytes()
convert_val2rxtrig() => bytes_to_fcr_rxtrig()
- Fix typo in serial8250_do_set_termios()
- Delete the verbose error message pr_info() in bytes_to_fcr_rxtrig()
- Rename *rx_int_trig/rx_trig* to *rxtrig* for several functions or variables
(but UI remains rx_int_trig)
- Change the meaningless variable name 'val' to 'bytes' following functions:
fcr_get_rxtrig_bytes(), bytes_to_fcr_rxtrig(), do_set_rxtrig(),
do_serial8250_set_rxtrig(), and serial8250_set_attr_rxtrig()
- Use up->fcr in order to get rxtrig_bytes instead of rx_trig_raw in
fcr_get_rxtrig_bytes()
- Use conf_type->rxtrig_bytes[0] instead of switch statement for support check
in register_dev_spec_attr_grp()
- Delete the checking whether a user changed FCR or not when minimum buffer
is needed in serial8250_do_set_termios()
Changes in V5.1:
- Fix FCR_RX_TRIG_MAX_STATE definition
Changes in V5:
- Support Tegra, 16650V2, 16654, and 16750
- Store default FCR value to up->fcr when the port is first created
- Add rx_trig_byte[] in uart_config[] for each device and use rx_trig_byte[]
in convert_fcr2val() and convert_val2rxtrig()
Changes in V4:
- Introduce fifo_bug flag in uart_8250_port structure
This is enabled only when parity is enabled and UART_BUG_PARITY is enabled
for up->bugs. If this flag is enabled, user cannot set RX trigger.
- Return -EOPNOTSUPP when it does not support device at convert_fcr2val() and
at convert_val2rxtrig()
- Set the nearest lower RX trigger when users input a meaningless value at
convert_val2rxtrig()
- Check whether p->fcr is existing at serial8250_clear_and_reinit_fifos()
- Set fcr = up->fcr in the begging of serial8250_do_set_termios()
Changes in V3:
- Change I/F from ioctl(2) to sysfs(rx_int_trig)
Changed in V2:
- Use _IOW for TIOCSFIFORTRIG definition
- Pass the interrupt trigger value itself
Signed-off-by: Yoshihiro YUNOMAE <yoshihiro.yunomae.ez@hitachi.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Some serial drivers (like 8250), want to add sysfs files. We need to do
so in a race-free way, so allow any port to be able to specify an
attribute group that should be added at device creation time.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Yoshihiro YUNOMAE <yoshihiro.yunomae.ez@hitachi.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
At present it is not possible to boot with the ttyNMI0 console treating
character input normally, instead character input triggers a prompt
telling the user how to trigger the knock detector and enter the
debugger. To use the console normally requires that kdb be entered and
the nmi_console command be used to enable the console (or if only kgdb
is present then gdb must directly manipulate the value of
kgdb_nmi_tty_enabled).
This patch automates the management of kgdb_nmi_tty_enabled by keeping
track of the number of file handles that are open for reading and using
that to determine how to tty should operate.
The approach means that:
1. Behaviour before init starts is unchanged.
2. If the userspace runs a getty or some other interactive process on
/dev/console (or explicitly on /dev/ttyNMI0) the tty will treat
character input like any other tty.
3. If the userspace doesn't use /dev/console or if it uses /dev/console
only to log messages (O_WRONLY) then the user prompt is retained.
Signed-off-by: Daniel Thompson <daniel.thompson@linaro.org>
Cc: Jiri Slaby <jslaby@suse.cz>
Cc: linux-serial@vger.kernel.org
Cc: Jason Wessel <jason.wessel@windriver.com>
Cc: kgdb-bugreport@lists.sourceforge.net
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Follow commit 2970b7f5ea ("serial: altera: Adopt
uart_console_write()") and don't open code the LF to LFCR conversion in
altera_jtaguart either. Use uart_console_write() instead.
Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
Reviewed-by: Daniel Thompson <daniel.thompson@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
The of_node is derived from pdev for every usage, define a
device_node variable instead.
Signed-off-by: Naveen Krishna Chatradhi <ch.naveen@samsung.com>
Reviewed-by: Tomasz Figa <t.figa@samsung.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
The cases should comes before default in a switch.
Even if we want the case and default to share same code.
Its good to define the case first followed by default.
Signed-off-by: Naveen Krishna Chatradhi <ch.naveen@samsung.com>
Reviewed-by: Tomasz Figa <t.figa@samsung.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
UART modules on some SoCs only differ in the fifosize of each
UART channel. Its useless to duplicate the drv_data structure
or create a compatible name for such a change.
We can get fifosize via the device tree nodes (not mandating it).
Also updates the documentation.
Signed-off-by: Naveen Krishna Chatradhi <ch.naveen@samsung.com>
Reviewed-by: Tomasz Figa <t.figa@samsung.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
It helps to cast struct uart_port to struct uart_8250_port at runtime.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This add the 32-bit register version LPUART support with big-endian
byte order.
Signed-off-by: Jingchang Lu <jingchang.lu@freescale.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
When the error of the same bit rate is detected, we will need to select
the recive margin is large. Current code holds the minimum error, it does
not have to check the recive margin. This adds this calculation.
Signed-off-by: Nobuhiro Iwamatsu <nobuhiro.iwamatsu.yj@renesas.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
If bit-rate calculation result of HSCIF is expect 255 from 0,
driver does not calculate error bit. However, we need to round
the value to calculate error bit in the case of negative value.
This rounds the value of bit-rate using clamp(), and bit-rate is the
case of negative value, it enables the calculation of the error bit.
Signed-off-by: Nobuhiro Iwamatsu <nobuhiro.iwamatsu.yj@renesas.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Currently, the decimal point is discarded calculation of BRR.
Therefore, it can not calculate a value close to the correct value.
This patch fixes this problem by using DIV_ROUND_CLOSEST.
Signed-off-by: Nobuhiro Iwamatsu <nobuhiro.iwamatsu.yj@renesas.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
In 2c964a2f "drivers: tty: Merge alloc_tty_struct and
initialize_tty_struct", I messed up the refactorization of
pty_common_install, causing use-after-free and NULL pointer derefs on
various error paths. This should fix it.
Reported-by: Julia Lawall <julia.lawall@lip6.fr>
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Rasmus Villemoes <linux@rasmusvillemoes.dk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
The two functions alloc_tty_struct and initialize_tty_struct are
always called together. Merge them into alloc_tty_struct, updating its
prototype and the only two callers of these functions.
Signed-off-by: Rasmus Villemoes <linux@rasmusvillemoes.dk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Commit 16052827d9 ("dmaengine/dma_slave:
introduce inline wrappers") changed the code to use the new API, but forgot
to update an error message.
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Cc: Jiri Kosina <trivial@kernel.org>
Cc: linux-serial@vger.kernel.org
--
v2:
- New
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| drivers/tty/serial/arc_uart.c:516:2: warning: (near initialization for 'arc_serial_pops.poll_put_char') [enabled by default]
This partially undoes "serial/arc: use uart_console_write() helper" by
restoring the prototpye of poll helper and use a different one in
uart_console_write()
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
Reported-by: kbuild test robot <fengguang.wu@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This driver does not currently use uart_console_write() and instead
provides is own LF to LFCR conversion in it's console_write() method.
We should use the library function instead.
Cmopile tested only (with ARCH=arm).
Signed-off-by: Daniel Thompson <daniel.thompson@linaro.org>
Cc: Tobias Klauser <tklauser@distanz.ch>
Cc: Jiri Slaby <jslaby@suse.cz>
Cc: linux-serial@vger.kernel.org
Cc: nios2-dev@lists.rocketboards.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Olof Johansson pointed out that usually the company name is picked as
namespace prefix to specific properties. So expect "energymicro,location"
but fall back to the previously introduced name "efm32,location".
Cc: Olof Johansson <olof@lixom.net>
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Fix breakage introduced by
commit c557d392fb,
'serial: Test for no tx data on tx restart'.
Reported-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Replace open-coded test for empty tx ring buffer with equivalent
helper function, uart_circ_empty(). No functional change.
Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Commit 717f3bbab3,
'serial_core: Fix conditional start_tx on ring buffer not empty'
exposes an incorrect assumption in several drivers' start_tx methods;
the tx ring buffer can, in fact, be empty when restarting tx while
performing flow control.
Affected drivers:
sunsab.c
ip22zilog.c
pmac_zilog.c
sunzilog.c
m32r_sio.c
imx.c
Other in-tree serial drivers either are not affected or already
test for empty tx ring buffer before transmitting.
Test for empty tx ring buffer in start_tx() method, after transmitting
x_char (if applicable).
Reported-by: Aaro Koskinen <aaro.koskinen@iki.fi>
Cc: Seth Bollinger <sethb@digi.com>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Sam Ravnborg <sam@ravnborg.org>
Cc: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
Cc: stable <stable@vger.kernel.org> # 3.15
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To support big-endian CPUs use the string versions of the io
read/write macros on the TX/RX fifos and the non-raw variants of
the readl/writel macros throughout. This way we don't byteswap
the characters coming from the fifos but we properly deal with
the little-endian nature of the serial hardware while controlling
it.
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
The TXX9_SIFCR_TDIL_MASK define is cut and pasted twice so we can delete
the second instance.
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
blackfin uart port drivers mistakenly set the struct uart_port
flags bit UPF_BUG_THRE (which only has meaning to the 8250 core)
while trying to set ASYNC_CTS_FLOW.
Uart port drivers can override termios settings based on actual
hardware support in their .set_termios method; the serial core
sets the appropriate port flags based on the overrides.
Overriding only the initial termios settings is accomplished
by only perform those overrides if the old termios parameter is
NULL.
CC: Sonic Zhang <sonic.zhang@analog.com>
CC: adi-buildroot-devel@lists.sourceforge.net
Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Uart port drivers may reconfigure termios settings based on available
hardware support; set/clear ASYNC_CTS_FLOW and ASYNC_CHECK_CD _after_
calling the port driver's .set_termios method.
Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Since at least before 2.6.30, it has not been possible to observe
a hung up file pointer in a tty driver's open() method unless/until
the driver open() releases the tty_lock() (eg., before blocking).
This is because tty_open() adds the file pointer while holding
the tty_lock() _and_ doesn't release the lock until after calling
the tty driver's open() method. [ Before tty_lock(), this was
lock_kernel(). ]
Since __tty_hangup() first waits on the tty_lock() before
enumerating and hanging up the open file pointers, either
__tty_hangup() will wait for the tty_lock() or tty_open() will
not yet have added the file pointer. For example,
CPU 0 | CPU 1
|
tty_open | __tty_hangup
.. | ..
tty_lock | ..
tty_reopen | tty_lock / blocks
.. |
tty_add_file(tty, filp) |
.. |
tty->ops->open(tty, filp) |
tty_port_open |
tty_port_block_til_ready |
.. |
while (1) |
.. |
tty_unlock | / unblocks
schedule | for each filp on tty->tty_files
| f_ops = tty_hung_up_fops;
| ..
| tty_unlock
tty_lock |
.. |
tty_unlock |
Note that since tty_port_block_til_ready() and similar drop
the tty_lock while blocking, when woken, the file pointer
must then be tested for having been hung up.
Also, fix bit-rotted drivers that used extra_count to track the
port->count bump.
CC: Mikael Starvik <starvik@axis.com>
CC: Samuel Ortiz <samuel@sortiz.org>
CC: "David S. Miller" <davem@davemloft.net>
Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
Acked-by: Jesper Nilsson <jesper.nilsson@axis.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Fix ASYNC_* constant usage that should be the corresponding UPF_*
constant.
CC: Grant Likely <grant.likely@linaro.org>
CC: Rob Herring <robh+dt@kernel.org>
CC: devicetree@vger.kernel.org
Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
tty->closing cannot be set on ipw_open() because the ipwireless tty
driver does not call any functions that set tty->closing.
CC: Jiri Kosina <jkosina@suse.cz>
Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
Acked-by: David Sterba <dsterba@suse.cz>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
tty->closing informs the line discipline that the hardware will
be shutting down imminently, and to disable further input other
than soft flow control (but to still allow additional output).
However, the tty lock is the necessary lock for preventing
concurrent changes to tty->closing. As shown by the call-tree
audit [1] of functions that modify tty->closing, the tty lock
is already held for those functions.
[1]
Call-tree audit of functions that modify tty->closing
* does not include call tree to tty_port_close(), tty_port_close_start(),
or tty_port_close_end() which is already documented in
'tty: Document locking for tty_port_close{,start,end}' that shows
callers to those 3 functions hold the tty lock
tty_release()
tty->ops->close() --+
|
__tty_hangup() |
tty->ops->close() --+
|
mp_close():drivers/staging/sb105x/sb_pci_mp.c
dngc_tty_close():drivers/staging/dgnc/dgnc_tty.c
dgap_tty_close():drivers/staging/dgap/dgap_tty.c
dgrp_tty_close():drivers/staging/dgrp/dgrp_tty.c
rp_close():drivers/tty/rocket.c
hvsi_close():drivers/tty/hvc/hvsi.c
rs_close():drivers/tty/serial/68328serial.c
rs_close():drivers/tty/serial/crisv10.c
uart_close():drivers/tty/serial/serial_core.c
isdn_tty_close():drivers/isdn/i4l/isdn_tty.c
tty3215_close():drivers/s390/char/con3215.c
tty_open()
tty_ldisc_setup() ----+
|
__tty_hangup() |
tty_ldisc_hangup() ---+
|
tty_set_ldisc() --------+
tty_ldisc_restore() --+
|
+- tty_ldisc_open()
ld->ops->open() --+
|
+- n_tty_open()
Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
The tty lock is held when the tty driver's hangup() method is called
(from the lone call-site, __tty_hangup()). The call-tree audit [1]
of tty_port_hangup() is a closed graph of the callers of
tty_port_hangup(); ie., all callers originate only from __tty_hangup().
Of these callers, none drop the tty lock prior to calling
tty_port_hangup().
[1]
Call-tree audit of tty_port_hangup()
__tty_hangup()
tty->ops->hangup() --+
|
rs_hangup():arch/ia64/hp/sim/simserial.c
line_hangup():arch/um/drivers/line.c
gdm_tty_hangup():drivers/staging/gdm724x/gdm_tty.c
fwtty_hangup():drivers/staging/fwserial/fwserial.c
acm_tty_hangup():drivers/usb/class/cdc-acm.c
serial_hangup():drivers/usb/serial/usb-serial.c
ipoctal_hangup():drivers/ipack/devices/ipoctal.c
cy_hangup():drivers/tty/cyclades.c
isicom_hangup():drivers/tty/isicom.c
rp_hangup():drivers/tty/rocket.c
dashtty_hangup():drivers/tty/metag_da.c
moxa_hangup():drivers/tty/moxa.c
gsmtty_hangup():drivers/tty/n_gsm.c
goldfish_tty_hangup():drivers/tty/goldfish.c
ehv_bc_tty_hangup():drivers/tty/ehv_bytechan.c
mxser_hangup():drivers/tty/mxser.c
kgdb_nmi_tty_hangup():drivers/tty/serial/kgdb_nmi.c
ifx_spi_hangup():drivers/tty/serial/ifx6x60.c
ntty_hangup():drivers/tty/nozomi.c
capinc_tty_hangup():drivers/isdn/capi/capi.c
mgslpc_hangup():drivers/char/pcmcia/synclink_cs.c
sdio_uart_hangup():drivers/mmc/card/sdio_uart.c
rfcomm_tty_hangup():net/bluetooth/rfcomm/tty.c
|
+- tty_port_hangup()
Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
The tty lock is held when the tty driver's open() method is called
(from tty_open()). The call-tree audit [1] of tty_port_block_til_ready()
is a closed graph of the callers of tty_port_block_til_ready();
ie., all callers originate only from tty_open().
Of these callers, none drop the tty lock.
Also, document tty_port_block_til_ready() may drop and reacquire
the tty lock when blocking, which means the tty or tty_port may have
changed state.
[1]
Call-tree audit of tty_port_block_til_ready()
* does not include call tree of tty_port_open() which is already
documented in 'tty: Document locking from tty_port_open()'
tty_open()
tty->ops->open() --+
|
cy_open():drivers/tty/cyclades.c
rp_open():drivers/tty/rocket.c
rs_open():drivers/tty/amiserial.c
moxa_open():drivers/tty/moxa.c
gsmtty_open():drivers/tty/n_gsm.c
rs_open():drivers/tty/serial/68328serial.c
uart_open():drivers/tty/serial/serial_core.c
isdn_tty_open():drivers/isdn/i4l/isdn_tty.c
mgslpc_open():drivers/char/pcmcia/synclink_cs.c
|
+- tty_port_block_til_ready()
Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
The tty lock is held when the tty driver's open method is called
(from the lone call-site, tty_open()). The call-tree audit [1] of
tty_port_open() is a closed graph of the callers of tty_port_open();
ie., all callers originate from only tty_open().
Of these callers, none drop the tty lock.
Also, document that tty_port_block_til_ready() may drop and reacquire
the tty lock when blocking, which means the tty or tty_port may have
changed state.
[1]
Call-tree audit of tty_port_open()
tty_open()
tty->ops->open() --+
|
rs_open():arch/ia64/hp/sim/simserial.c
*line_open():arch/um/drivers/line.c
gdm_tty_open():drivers/staging/gdm724x/gdm_tty.c
fwtty_open():drivers/staging/fwserial/fwserial.c
acm_tty_open():drivers/usb/class/cdc-acm.c
serial_open():drivers/usb/serial/usb-serial.c
pti_tty_driver_open():drivers/misc/pti.c
ipoctal_open():drivers/ipack/devices/ipoctal.c
isicom_open():drivers/tty/isicom.c
dashtty_open():drivers/tty/metag_da.c
goldfish_tty_open():drivers/tty/goldfish.c
ehv_bc_tty_open():drivers/tty/ehv_bytechan.c
mxser_open():drivers/tty/mxser.c
kgdb_nmi_tty_open():drivers/tty/serial/kgdb_nmi.c
ifx_spi_open():drivers/tty/serial/ifx6x60.c
smd_tty_open():drivers/tty/serial/msm_smd_tty.c
ntty_open():drivers/tty/nozomi.c
capinc_tty_open():drivers/isdn/capi/capi.c
tpk_open():drivers/char/ttyprintk.c
sdio_uart_open():drivers/mmc/card/sdio_uart.c
rfcomm_tty_open():net/bluetooth/rfcomm/tty.c
|
+- tty_port_open()
* line_open() is the .open method for 2 um drivers
declared in ./arch/um/drivers/stdio_console.c and
in ./arch/um/drivers/ssl.c, and not called directly
Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
The tty lock is held when the tty driver's .close method is called
(from the two lone call-sites of tty_release() and __tty_hangup()).
The call-tree audit[1] of tty_port_close(), tty_port_close_start,
and tty_port_close_end() is a closed graph of the callers of these
3 functions; ie., all callers originate from only tty_release()
or __tty_hangup().
Of these callers, none drop the tty lock.
Also, document tty_port_close_start() may drop and reacquire the
tty lock in tty_wait_until_sent_from_close(), which means the tty
or tty_port may have changed state (but not reopened or hung up).
[1]
Call-tree audit of tty_port_close, tty_port_close_start, and tty_port_close_end()
tty_release()
tty->ops->close() --+
|
__tty_hangup() |
tty->ops->close() --+
|
+- rp_close():drivers/tty/rocket.c -------------------+
+- uart_close():drivers/tty/serial/serial_core.c -----+
| +- tty_port_close_start()
|
|
+- close():drivers/tty/synclinkmp.c ------------------+
+- rs_close():drivers/tty/amiserial.c ----------------+
+- gsmtty_close():drivers/tty/n_gsm.c ----------------+
+- mxser_close():drivers/tty/mxser.c -----------------+
+- close():drivers/tty/synclink_gt.c -----------------+
+- mgsl_close():drivers/tty/synclink.c ---------------+
+- isdn_tty_close():drivers/isdn/i4l/isdn_tty.c ------+
+- mgslpc_close():drivers/char/pcmcia/synclink_cs.c --+
+- ircomm_tty_close():net/irda/ircomm/ircomm_tty.c ---+
| |
rs_close():arch/ia64/hp/sim/simserial.c |
*line_close():arch/um/drivers/line.c |
gdm_tty_close():drivers/staging/gdm724x/gdm_tty.c
fwtty_close():drivers/staging/fwserial/fwserial.c
acm_tty_close():drivers/usb/class/cdc-acm.c
serial_close():drivers/usb/serial/usb-serial.c
pti_tty_driver_close():drivers/misc/pti.c
ipoctal_close():drivers/ipack/devices/ipoctal.c
cy_close():drivers/tty/cyclades.c
isicom_close():drivers/tty/isicom.c
dashtty_close():drivers/tty/metag_da.c
moxa_close():drivers/tty/moxa.c
goldfish_tty_close():drivers/tty/goldfish.c
ehv_bc_tty_close():drivers/tty/ehv_bytechan.c
kgdb_nmi_tty_close():drivers/tty/serial/kgdb_nmi.c
ifx_spi_close():drivers/tty/serial/ifx6x60.c
smd_tty_close():drivers/tty/serial/msm_smd_tty.c
ntty_close():drivers/tty/nozomi.c
capinc_tty_close():drivers/isdn/capi/capi.c
tpk_close():drivers/char/ttyprintk.c
sdio_uart_close():drivers/mmc/card/sdio_uart.c |
rfcomm_tty_close():net/bluetooth/rfcomm/tty.c |
| |
+- tty_port_close():drivers/tty/tty_port.c -----------+
|
+- tty_port_close_start()
+- tty_port_close_end()
* line_close() is the .close method for 2 um drivers,
declared in ./arch/um/drivers/stdio_console.c and
in ./arch/um/drivers/ssl.c, and not called directly
Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
The DMA burst size must match the transmit FIFO depth in order
to make sure all character are transmitted. This patch calculates
DMA burst size by using FIFO depth rather than use the hardcoded
16 bytes. This is required since some UARTs (e.g. UART2 on Vybrid)
have a FIFO depth of 8 bytes.
Signed-off-by: Stefan Agner <stefan@agner.ch>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
The DMA RX timeout calculation is done based on FIFO buffer size and
port timeout when setting up DMA. However, both variables are not
necessarily initialized at DMA initialization time, which can lead
to a division by zero.
Move the timeout calculation to set_termios where both variables
are initialized.
Signed-off-by: Stefan Agner <stefan@agner.ch>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
When a tty is opened for the serial console, the termios c_cflag
settings are inherited from the console line settings.
However, if the tty is subsequently closed, the termios settings
are lost. This results in a garbled console if the console is later
suspended and resumed.
Preserve the termios c_cflag for the serial console when the tty
is shutdown; this reflects the most recent line settings.
Fixes: Bugzilla #69751, 'serial console does not wake from S3'
Reported-by: Valerio Vanni <valerio.vanni@inwind.it>
Acked-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
The Rx dma descriptor allocated without the DMA_ACK flags so that
once after tarnsfer done or terminated, client can ack the descriptor
to free it for later use.
If the Rx DMA is terminated for some reason then rx-dma descriptor
is not getting acked which causes the memory leak and list of usage
desc to grow continuously.
Hence, acknowledge the rx-dma descriptor once transfer is terminated
to avoid memory leak and desc list to grow.
Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
When channel is require to stop transmit then update the Tx circular
buffer only when DMA based transfer is in progress. If there is no
DMA based transfer then no need to update the Tx buffer.
Signed-off-by: Pradeep Goudagunta <pgoudagunta@nvidia.com>
Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Every uart driver that provides a console driver needs to
be built-in for the console code to work, we get a build
error for modular console drivers.
This changes the SERIAL_HS_LPC32XX_CONSOLE symbol to depend
on the SERIAL_HS_LPC32XX driver being built-in, just like
we do for all the other uart drivers.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
When CONFIG_SERIAL_PXA_CONSOLE is disabled, the serial_pxa_get_poll_char
and serial_pxa_put_poll_char functions are not defined, and we can't
reference them.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This allows a param less earlycon to pick up the earlyconsole from
chosen/stdout-path
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
With this change both earlyprintk and earlycon coexist
We switch over to latter in next patch
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
The ARC UART MMIO helpers would take arc_uart_port and then reference
generic uart_port->membase member. So change them to difrectly refer to
uart_port and fix call sites accordingly.
This removes the need for to_arc_port() converion almost eveeywhere and
makes code a bit easier to read.
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
First try to find the named clock variants then fall back to the already
existing handling of a nameless declared baudclk.
This also adds the missing documentation for this already existing variant.
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
The flags member has upf_t type and corresponding macros to define them. This
patch converts ASYNC_SKIP_TEST to UPF_SKIP_TEST in 8250_dw.c.
Otherwise we got a sparse warning:
drivers/tty/serial/8250/8250_dw.c:302:46: warning: restricted upf_t degrades to integer
drivers/tty/serial/8250/8250_dw.c:302:62: warning: restricted upf_t degrades to integer
drivers/tty/serial/8250/8250_dw.c:302:26: warning: incorrect type in assignment (different base types)
drivers/tty/serial/8250/8250_dw.c:302:26: expected restricted upf_t [usertype] flags
drivers/tty/serial/8250/8250_dw.c:302:26: got unsigned int
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This replaces the Baytrail specific custom set_termios hook
with a more generic one where the clock framework is used to
set the rate. The method also doesn't need to be limited to
just Baytrail, so it's used with all ACPI platforms.
Signed-off-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
When building multi_v7_defconfig with CONFIG_ARM_LPAE=y the following warning
is seen:
drivers/tty/serial/samsung.c: In function 's3c24xx_serial_init_port':
drivers/tty/serial/samsung.c:1229:2: warning: format '%x' expects argument of type 'unsigned int', but argument 2 has type 'resource_size_t' [-Wformat]
Use %pa to print 'resource_size_t' type to fix the warning.
Reported-by: Olof's autobuilder <build@lixom.net>
Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>
Reviewed-by: Jingoo Han <jg1.han@samsung.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
There is a risk that the variable will be used without being initialized.
This was largely found by using a static code analysis program called cppcheck.
Signed-off-by: Rickard Strandqvist <rickard_strandqvist@spectrumdigital.se>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
the current codes send 1 bytes, then after getting TX done interrupt,
send subsequent bytes. it causes redundant interrupts.
for example, if we have 3 bytes in TX buffer, the TX flow is:
1. send 1 byte
2. get TX down interrupt
3. send the left 2 bytes
4. get TX down interrupt
this patch moves to send more bytes and decrease interrupts, the new
flow is:
1. send 3 bytes
2. get TX down interrupt
Signed-off-by: Qipan Li <Qipan.Li@csr.com>
Signed-off-by: Barry Song <Baohua.Song@csr.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Call uart_write_wakeup() after writing the hardware FIFO and updateing the FIFO
pointers.
This fixes high latency and jitter on PPP over Serial links.
Reported-by: Jun Shih <Jun.Shih@pason.com>
Tested-by: Jun Shih <Jun.Shih@pason.com>
Signed-off-by: Johannes Thumshirn <johannes.thumshirn@men.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This patch makes enable_ms() optional, so we can eliminate a lot of
empty enable_ms() implementations from driver code.
Signed-off-by: Alexander Shiyan <shc_work@mail.ru>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This patch removes s5p64x0 related serial because of removing
support for s5p64x0 SoCs.
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Current driver code relies on probe order of particular samsung-uart
instances, which makes it impossible to get proper initialization of
ports when not all ports are available on board, not even saying of
deterministic device naming.
This patch fixes this on DT-enabled systems by using DT aliases for
ports as instance ID, if specified, or falling back to legacy method
otherwise to provide backwards compatibility.
Signed-off-by: Tomasz Figa <t.figa@samsung.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Migrating to use devres managed APIs devm_kzalloc, devm_ioremap and
devm_clk_get.
Signed-off-by: Tushar Behera <tushar.b@samsung.com>
Reviewed-by: Daniel Thompson <daniel.thompson@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
The label 'out' is only used to return the error code. We can return the
error code directly and remove 'out' label.
Signed-off-by: Tushar Behera <tushar.b@samsung.com>
Reviewed-by: Daniel Thompson <daniel.thompson@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
probe_err label only returns the error code. This label can be removed
and the error code can be returned directly.
Signed-off-by: Tushar Behera <tushar.b@samsung.com>
Reviewed-by: Sachin Kamat <sachin.kamat@samsung.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
There are a bunch of users open coding the for_each_node_by_name() by
calling of_find_node_by_name() directly instead of using the macro. This
is getting in the way of some cleanups, and the possibility of removing
of_find_node_by_name() entirely. Clean it up so that all the users are
consistent.
Signed-off-by: Grant Likely <grant.likely@linaro.org>
Cc: Rob Herring <robh+dt@kernel.org>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: "Rafael J. Wysocki" <rjw@rjwysocki.net>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Takashi Iwai <tiwai@suse.de>
The evh_bytechan, hvc_opal and hvc_vio drivers all open code the parsing
of the stdout node in the device tree. This patch simplifies the driver
by removing the duplicated functionality.
Signed-off-by: Grant Likely <grant.likely@linaro.org>
If the devicetree specifies a serial port as a stdout device, then the
kernel can use it as the default console if nothing else was selected on
the command line. For any serial port that uses the uart_add_one_port()
feature, the uart_add_one_port() has all the information needed to
automatically enable the console device, which is what this patch does.
With this change applied, a device tree platform can be booted without
any console= parameters on the command line and the kernel will still be
able to determine its console.
Tested on QEMU Versatile model and i.MX
Signed-off-by: Grant Likely <grant.likely@linaro.org>
Tested-by: Sascha Hauer <s.hauer@pengutronix.de>
A new set of bug fixes for 3.16, containing patches for seven platforms:
at91:
- drivers/misc fix for Kconfig PWM symbol
- correction of several values in DT after conversion to CCF
- fix at91sam9261/at91sam9261ek mistake in slow crystal vs. slow RC osc
imx:
- Use GPIO for card CD/WP on imx51-babbage and eukrea-mbimxsd51,
because controller base CD/WP is not working in esdhc driver due to
runtime PM support
- A couple of random ventana gw5xxx board fixes
- Add IMX_IPUV3_CORE back to defconfig, which gets lost when moving
IPUv3 driver out of staging tree
- Fix enet/fec clock selection on imx6sl
- Fix display node on imx53-m53evk board
- A couple of Cubox-i updates from Russell, which were omitted from
the merge window due to dependency
integrator:
- fix an OF-related regression against 3.15
mvebu:
- mvebu (v7)
- Fix broken SoC ID detection
- Select ARM_CPU_SUSPEND for v7
- Remove armada38x compatible string (no users yet)
- Enable Dove SoC in mvebu_v7_defconfig
- kirkwood
- Fix phy-connection-type on GuruPlug board
qcom:
- enable gsbi driver in defconfig
- fix section mismatch warning in serial driver
samsung:
- use WFI macro in platform_do_lowpower because exynos cpuhotplug
includes a hardcoded WFI instruction and it causes compile error
in Thumb-2 mode.
- fix GIC reg sizes for exynos4 SoCs
- remove reset timer counter value during boot and resume for mct
to fix a big jump in printk timestamps
- fix pm code to check cortex-A9 for another exynos SoCs
- don't rely on firmware's secondary_cpu_start for mcpm
sti:
- Ethernet clocks were wrongly defined for STiH415/416 platforms
- STiH416 B2020 revision E DTS file name contained uppercase, change to
lowercase.
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Merge tag 'fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc
Pull ARM SoC fixes from Arnd Bergmann:
"A new set of bug fixes for 3.16, containing patches for seven
platforms:
at91:
- drivers/misc fix for Kconfig PWM symbol
- correction of several values in DT after conversion to CCF
- fix at91sam9261/at91sam9261ek mistake in slow crystal vs. slow RC osc
imx:
- Use GPIO for card CD/WP on imx51-babbage and eukrea-mbimxsd51,
because controller base CD/WP is not working in esdhc driver due to
runtime PM support
- A couple of random ventana gw5xxx board fixes
- Add IMX_IPUV3_CORE back to defconfig, which gets lost when moving
IPUv3 driver out of staging tree
- Fix enet/fec clock selection on imx6sl
- Fix display node on imx53-m53evk board
- A couple of Cubox-i updates from Russell, which were omitted from
the merge window due to dependency
integrator:
- fix an OF-related regression against 3.15
mvebu:
- mvebu (v7)
- Fix broken SoC ID detection
- Select ARM_CPU_SUSPEND for v7
- Remove armada38x compatible string (no users yet)
- Enable Dove SoC in mvebu_v7_defconfig
- kirkwood
- Fix phy-connection-type on GuruPlug board
qcom:
- enable gsbi driver in defconfig
- fix section mismatch warning in serial driver
samsung:
- use WFI macro in platform_do_lowpower because exynos cpuhotplug
includes a hardcoded WFI instruction and it causes compile error
in Thumb-2 mode.
- fix GIC reg sizes for exynos4 SoCs
- remove reset timer counter value during boot and resume for mct
to fix a big jump in printk timestamps
- fix pm code to check cortex-A9 for another exynos SoCs
- don't rely on firmware's secondary_cpu_start for mcpm
sti:
- Ethernet clocks were wrongly defined for STiH415/416 platforms
- STiH416 B2020 revision E DTS file name contained uppercase, change to
lowercase"
* tag 'fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (33 commits)
ARM: at91/dt: sam9261: remove slow RC osc
ARM: at91/dt: define sam9261ek slow crystal frequency
ARM: at91/dt: sam9261: correctly define mainck
ARM: at91/dt: sam9n12: correct PLLA ICPLL and OUT values
ARM: at91/dt: sam9x5: correct PLLA ICPLL and OUT values
misc: atmel_pwm: fix Kconfig symbols
ARM: integrator: fix OF-related regression
ARM: mvebu: Fix the improper use of the compatible string armada38x using a wildcard
ARM: dts: kirkwood: fix phy-connection-type for Guruplug
ARM: EXYNOS: Don't rely on firmware's secondary_cpu_start for mcpm
ARM: dts: imx51-eukrea-mbimxsd51-baseboard: unbreak esdhc.
ARM: dts: imx51-babbage: Fix esdhc setup
ARM: dts: mx5: Move the display out of soc {} node
ARM: dts: mx5: Fix IPU port node placement
ARM: mvebu: select ARM_CPU_SUSPEND for Marvell EBU v7 platforms
ARM: mvebu: Fix broken SoC ID detection
ARM: imx_v6_v7_defconfig: Enable CONFIG_IMX_IPUV3_CORE
ARM: multi_v7_defconfig: Add QCOM GSBI driver
ARM: stih41x: Rename stih416-b2020-revE.dts to stih416-b2020e.dts
tty: serial: msm: Fix section mismatch warning
...
Here are some tty / serial driver bugfixes for 3.16-rc2 that resolve
some reported issues. The samsung driver build error itself has been
reported by a bunch of people, sorry about that one. The others are all
tiny and everyone seems to like them in linux-next so far.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Merge tag 'tty-3.16-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty
Pull tty/serial bugfixes from Greg KH:
"Here are some tty / serial driver bugfixes for 3.16-rc2 that resolve
some reported issues. The samsung driver build error itself has been
reported by a bunch of people, sorry about that one. The others are
all tiny and everyone seems to like them in linux-next so far"
* tag 'tty-3.16-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty:
tty/serial: fix 8250 early console option passing to regular console
tty: Correct INPCK handling
serial: Fix IGNBRK handling
serial: samsung: Fix build error
The fixes included are:
- Ethernet clocks were wrongly defined for STiH415/416 platforms
- STiH416 B2020 revision E DTS file name contained uppercase, change to
lowercase.
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Merge tag 'sti-fixes-for-v3.16-rc1' of git://git.stlinux.com/devel/kernel/linux-sti into fixes
Merge "STi: DT fixes for v3.16" from Maxime Coquelin:
Couple of DT fixes for STi platform issues discovered on V3.16-rc1.
The fixes included are:
- Ethernet clocks were wrongly defined for STiH415/416 platforms
- STiH416 B2020 revision E DTS file name contained uppercase, change to
lowercase.
* tag 'sti-fixes-for-v3.16-rc1' of git://git.stlinux.com/devel/kernel/linux-sti: (2963 commits)
ARM: stih41x: Rename stih416-b2020-revE.dts to stih416-b2020e.dts
ARM: STi: DT: Properly define sti-ethclk & stmmaceth for stih415/6
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
In the conversion to generic early console, the passing of options from
the early 8250 console to the regular ttyS console was broken. This
resulted in the baud rate changing when switching consoles during boot.
This feature allows specifying a single console option on the kernel
command line rather than both an early console and regular serial tty
console. It would be nice to generalize this feature. However, it only
works if the correct baud rate can be probed early which is not the
case on many platforms which have non-standard UART clock rates. So for
now, this is left as an 8250 specific feature.
Reported-and-tested-by: Tony Luck <tony.luck@intel.com>
Signed-off-by: Rob Herring <robh@kernel.org>
Cc: Jiri Slaby <jslaby@suse.cz>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
If INPCK is not set, input parity detection should be disabled. This means
parity errors should not be received from the tty driver, and the data
received should be treated normally.
SUS v3, 11.2.2, General Terminal Interface - Input Modes, states:
"If INPCK is set, input parity checking shall be enabled. If INPCK is
not set, input parity checking shall be disabled, allowing output parity
generation without input parity errors. Note that whether input parity
checking is enabled or disabled is independent of whether parity detection
is enabled or disabled (see Control Modes). If parity detection is enabled
but input parity checking is disabled, the hardware to which the terminal
is connected shall recognize the parity bit, but the terminal special file
shall not check whether or not this bit is correctly set."
Ignore parity errors reported by the tty driver when INPCK is not set, and
handle the received data normally.
Fixes: Bugzilla #71681, 'Improvement of n_tty_receive_parity_error from n_tty.c'
Reported-by: Ivan <athlon_@mail.ru>
Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
If IGNBRK is set without either BRKINT or PARMRK set, some uart
drivers send a 0x00 byte for BREAK without the TTYBREAK flag to the
line discipline, when it should send either nothing or the TTYBREAK flag
set. This happens because the read_status_mask masks out the BI
condition, which uart_insert_char() then interprets as a normal 0x00 byte.
SUS v3 is clear regarding the meaning of IGNBRK; Section 11.2.2, General
Terminal Interface - Input Modes, states:
"If IGNBRK is set, a break condition detected on input shall be ignored;
that is, not put on the input queue and therefore not read by any
process."
Fix read_status_mask to include the BI bit if IGNBRK is set; the
lsr status retains the BI bit if a BREAK is recv'd, which is
subsequently ignored in uart_insert_char() when masked with the
ignore_status_mask.
Affected drivers:
8250 - all
serial_txx9
mfd
amba-pl010
amba-pl011
atmel_serial
bfin_uart
dz
ip22zilog
max310x
mxs-auart
netx-serial
pnx8xxx_uart
pxa
sb1250-duart
sccnxp
serial_ks8695
sirfsoc_uart
st-asc
vr41xx_siu
zs
sunzilog
fsl_lpuart
sunsab
ucc_uart
bcm63xx_uart
sunsu
efm32-uart
pmac_zilog
mpsc
msm_serial
m32r_sio
Unaffected drivers:
omap-serial
rp2
sa1100
imx
icom
Annotated for fixes:
altera_uart
mcf
Drivers without break detection:
21285
xilinx-uartps
altera_jtaguart
apbuart
arc-uart
clps711x
max3100
uartlite
msm_serial_hs
nwpserial
lantiq
vt8500_serial
Unknown:
samsung
mpc52xx_uart
bfin_sport_uart
cpm_uart/core
Fixes: Bugzilla #71651, '8250_core.c incorrectly handles IGNBRK flag'
Reported-by: Ivan <athlon_@mail.ru>
Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
First round of fixes for 3.16-rc, mostly cc: stable, and the vt/vgacon
fixes from Daniel [1] to avoid hangs and unclaimed register errors on
module load/reload.
* tag 'drm-intel-fixes-2014-06-17' of git://anongit.freedesktop.org/drm-intel:
drm/i915/bdw: remove erroneous chv specific workarounds from bdw code
drm/i915: fix possible refcount leak when resetting forcewake
drm/i915: Reorder semaphore deadlock check
drm/i95: Initialize active ring->pid to -1
drm/i915: set backlight duty cycle after backlight enable for gen4
drm/i915: Avoid div-by-zero when pixel_multiplier is zero
drm/i915: Disable FBC by default also on Haswell and later
drm/i915: Kick out vga console
drm/i915: Fixup global gtt cleanup
vt: Don't ignore unbind errors in vt_unbind
vt: Fix up unregistration of vt drivers
vt: Fix replacement console check when unbinding
WARNING: drivers/tty/built-in.o(.data+0x3544): Section mismatch in
reference from the variable msm_platform_driver to the function
.init.text:msm_serial_probe()
The variable msm_platform_driver references
the function __init msm_serial_probe()
If the reference is valid then annotate the
variable with __init* or __refdata (see linux/init.h) or name the variable:
*_template, *_timer, *_sht, *_ops, *_probe, *_probe_one, *_console
Signed-off-by: Kumar Gala <galak@codeaurora.org>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Fixes the following build error due to a typo introduced
by commit e4ac92df27 ("serial: samsung: Neaten dbg uses"):
drivers/tty/serial/samsung.c:69:26: error: ‘buf’ undeclared (first use in this function)
Reported-by: Arun Kumar K <arun.kk@samsung.com>
Signed-off-by: Sachin Kamat <sachin.kamat@samsung.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Christian Engelmayer <cengelma@gmx.at>
Acked-by: Joe Perches <joe@perches.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Pull arch/tile changes from Chris Metcalf:
"These mostly just address smaller issues reported to me"
* git://git.kernel.org/pub/scm/linux/kernel/git/cmetcalf/linux-tile:
arch: tile: kernel: unaligned.c: Cleaning up uninitialized variables
drivers/tty/hvc/hvc_tile.c: use PTR_ERR_OR_ZERO
replace strict_strto* call with kstrto*
tile: Update comments for generic idle conversion
tile: cleanup the comment in init_pgprot
tile: use BOOTMEM_DEFAULT instead of magic number 0 for reserve_bootmem flags
Now that 3.15 is released, this merges the 'next' branch into 'master',
bringing us to the normal situation where my 'master' branch is the
merge window.
* accumulated work in next: (6809 commits)
ufs: sb mutex merge + mutex_destroy
powerpc: update comments for generic idle conversion
cris: update comments for generic idle conversion
idle: remove cpu_idle() forward declarations
nbd: zero from and len fields in NBD_CMD_DISCONNECT.
mm: convert some level-less printks to pr_*
MAINTAINERS: adi-buildroot-devel is moderated
MAINTAINERS: add linux-api for review of API/ABI changes
mm/kmemleak-test.c: use pr_fmt for logging
fs/dlm/debug_fs.c: replace seq_printf by seq_puts
fs/dlm/lockspace.c: convert simple_str to kstr
fs/dlm/config.c: convert simple_str to kstr
mm: mark remap_file_pages() syscall as deprecated
mm: memcontrol: remove unnecessary memcg argument from soft limit functions
mm: memcontrol: clean up memcg zoneinfo lookup
mm/memblock.c: call kmemleak directly from memblock_(alloc|free)
mm/mempool.c: update the kmemleak stack trace for mempool allocations
lib/radix-tree.c: update the kmemleak stack trace for radix tree allocations
mm: introduce kmemleak_update_trace()
mm/kmemleak.c: use %u to print ->checksum
...
Some sysrq handlers can run for a long time, because they dump a lot of
data onto a serial console. Having RCU stall warnings pop up in the
middle of them only makes the problem worse.
This patch temporarily disables RCU stall warnings while a sysrq request
is handled.
Signed-off-by: Rik van Riel <riel@redhat.com>
Suggested-by: Paul McKenney <paulmck@linux.vnet.ibm.com>
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Cc: Madper Xie <cxie@redhat.com>
Cc: Randy Dunlap <rdunlap@infradead.org>
Cc: Richard Weinberger <richard@nod.at>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Echoing values into /proc/sysrq-trigger seems to be a popular way to get
information out of the kernel. However, dumping information about
thousands of processes, or hundreds of CPUs to serial console can result
in IRQs being blocked for minutes, resulting in various kinds of cascade
failures.
The most common failure is due to interrupts being blocked for a very
long time. This can lead to things like failed IO requests, and other
things the system cannot easily recover from.
This problem is easily fixable by making __handle_sysrq use RCU instead
of spin_lock_irqsave.
This leaves the warning that RCU grace periods have not elapsed for a
long time, but the system will come back from that automatically.
It also leaves sysrq-from-irq-context when the sysrq keys are pressed,
but that is probably desired since people want that to work in
situations where the system is already hosed.
The callers of register_sysrq_key and unregister_sysrq_key appear to be
capable of sleeping.
Signed-off-by: Rik van Riel <riel@redhat.com>
Reported-by: Madper Xie <cxie@redhat.com>
Cc: Randy Dunlap <rdunlap@infradead.org>
Cc: Richard Weinberger <richard@nod.at>
Cc: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Otherwise the loop will never stop since we don't make any
forward progress. Noticed while breaking this accidentally
in a painful attempt to make vga_con unregistering work.
With this patch we'll bail out on the first attempt, which
at least leaves a useful enough system behind for debugging.
Livelocks on console_lock just aren't fun.
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Jiri Slaby <jslaby@suse.cz>
Reviewed-by: David Herrmann <dh.herrmann@gmail.com>
Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
A bunch of issues:
- We should not kick out the default console (which is tracked in
conswitchp), so check for that.
- Add better error codes so callers can differentiate between "something
went wrong" and "your driver isn't registered already". i915 needs
that so it doesn't fall over when reloading the driver and hence
vga_con is already unregistered.
- There's a mess with the driver flags: What we need to check for is
that the driver isn't used any more, i.e. unbound completely (FLAG_INIT).
And not whether it's the boot console or not (which is the only one
which doesn't have FLAG_MODULE). Otherwise there's no way to kick
out the boot console, which i915 wants to do to prevent havoc with
vga_con interferring (which tends to hang machines).
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Jiri Slaby <jslaby@suse.cz>
Reviewed-by: David Herrmann <dh.herrmann@gmail.com>
Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
I don't fully understand the magic of the vt register/unregister
logic, but apparently everything but the inital console (as set
in the conswitchp pointer) is marked with FLAG_MODULE. Which means
if something unregistered the boot vt driver (e.g. i915.ko kicking
out vga_con) there's nothing left when trying to unbind e.g. fbcon
through sysfs.
But in most cases have the dummy console hanging around besides the
boot console, so this test is fairly dubious. What we actually want is
simply a different console than the one we want to unbind.
v2: Correct the commit message to clarify that the dummy console isn't
always around, but only in most cases (David).
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Jiri Slaby <jslaby@suse.cz>
Cc: David Herrmann <dh.herrmann@gmail.com>
Reviewed-by: David Herrmann <dh.herrmann@gmail.com>
Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Merge misc updates from Andrew Morton:
- a few fixes for 3.16. Cc'ed to stable so they'll get there somehow.
- various misc fixes and cleanups
- most of the ocfs2 queue. Review is slow...
- most of MM. The MM queue is pretty huge this time, but not much in
the way of feature work.
- some tweaks under kernel/
- printk maintenance work
- updates to lib/
- checkpatch updates
- tweaks to init/
* emailed patches from Andrew Morton <akpm@linux-foundation.org>: (276 commits)
fs/autofs4/dev-ioctl.c: add __init to autofs_dev_ioctl_init
fs/ncpfs/getopt.c: replace simple_strtoul by kstrtoul
init/main.c: remove an ifdef
kthreads: kill CLONE_KERNEL, change kernel_thread(kernel_init) to avoid CLONE_SIGHAND
init/main.c: add initcall_blacklist kernel parameter
init/main.c: don't use pr_debug()
fs/binfmt_flat.c: make old_reloc() static
fs/binfmt_elf.c: fix bool assignements
fs/efs: convert printk(KERN_DEBUG to pr_debug
fs/efs: add pr_fmt / use __func__
fs/efs: convert printk to pr_foo()
scripts/checkpatch.pl: device_initcall is not the only __initcall substitute
checkpatch: check stable email address
checkpatch: warn on unnecessary void function return statements
checkpatch: prefer kstrto<foo> to sscanf(buf, "%<lhuidx>", &bar);
checkpatch: add warning for kmalloc/kzalloc with multiply
checkpatch: warn on #defines ending in semicolon
checkpatch: make --strict a default for files in drivers/net and net/
checkpatch: always warn on missing blank line after variable declaration block
checkpatch: fix wildcard DT compatible string checking
...
... instead of naked numbers.
Stuff in sysrq.c used to set it to 8 which is supposed to mean above
default level so set it to DEBUG instead as we're terminating/killing all
tasks and we want to be verbose there.
Also, correct the check in x86_64_start_kernel which should be >= as
we're clearly issuing the string there for all debug levels, not only
the magical 10.
Signed-off-by: Borislav Petkov <bp@suse.de>
Acked-by: Kees Cook <keescook@chromium.org>
Acked-by: Randy Dunlap <rdunlap@infradead.org>
Cc: Joe Perches <joe@perches.com>
Cc: Valdis Kletnieks <Valdis.Kletnieks@vt.edu>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Pull core irq updates from Thomas Gleixner:
"The irq department delivers:
- Another tree wide update to get rid of the horrible create_irq
interface along with its even more horrible variants. That also
gets rid of the last leftovers of the initial sparse irq hackery.
arch/driver specific changes have been either acked or ignored.
- A fix for the spurious interrupt detection logic with threaded
interrupts.
- A new ARM SoC interrupt controller
- The usual pile of fixes and improvements all over the place"
* 'irq-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (40 commits)
Documentation: brcmstb-l2: Add Broadcom STB Level-2 interrupt controller binding
irqchip: brcmstb-l2: Add Broadcom Set Top Box Level-2 interrupt controller
genirq: Improve documentation to match current implementation
ARM: iop13xx: fix msi support with sparse IRQ
genirq: Provide !SMP stub for irq_set_affinity_notifier()
irqchip: armada-370-xp: Move the devicetree binding documentation
irqchip: gic: Use mask field in GICC_IAR
genirq: Remove dynamic_irq mess
ia64: Use irq_init_desc
genirq: Replace dynamic_irq_init/cleanup
genirq: Remove irq_reserve_irq[s]
genirq: Replace reserve_irqs in core code
s390: Avoid call to irq_reserve_irqs()
s390: Remove pointless arch_show_interrupts()
s390: pci: Check return value of alloc_irq_desc() proper
sh: intc: Remove pointless irq_reserve_irqs() invocation
x86, irq: Remove pointless irq_reserve_irqs() call
genirq: Make create/destroy_irq() ia64 private
tile: Use SPARSE_IRQ
tile: pci: Use irq_alloc/free_hwirq()
...
- Another round of clean-up of FDT related code in architecture code.
This removes knowledge of internal FDT details from most architectures
except powerpc.
- Conversion of kernel's custom FDT parsing code to use libfdt.
- DT based initialization for generic serial earlycon. The introduction
of generic serial earlycon support went in thru tty tree.
- Improve the platform device naming for DT probed devices to ensure
unique naming and use parent names instead of a global index.
- Fix a race condition in of_update_property.
- Unify the various linker section OF match tables and fix several
function prototype errors.
- Update platform_get_irq_byname to work in deferred probe cases.
- 2 binding doc updates
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Merge tag 'devicetree-for-3.16' of git://git.kernel.org/pub/scm/linux/kernel/git/robh/linux into next
Pull DeviceTree updates from Rob Herring:
- Another round of clean-up of FDT related code in architecture code.
This removes knowledge of internal FDT details from most
architectures except powerpc.
- Conversion of kernel's custom FDT parsing code to use libfdt.
- DT based initialization for generic serial earlycon. The
introduction of generic serial earlycon support went in through the
tty tree.
- Improve the platform device naming for DT probed devices to ensure
unique naming and use parent names instead of a global index.
- Fix a race condition in of_update_property.
- Unify the various linker section OF match tables and fix several
function prototype errors.
- Update platform_get_irq_byname to work in deferred probe cases.
- 2 binding doc updates
* tag 'devicetree-for-3.16' of git://git.kernel.org/pub/scm/linux/kernel/git/robh/linux: (58 commits)
of: handle NULL node in next_child iterators
of/irq: provide more wrappers for !CONFIG_OF
devicetree: bindings: Document micrel vendor prefix
dt: bindings: dwc2: fix required value for the phy-names property
of_pci_irq: kill useless variable in of_irq_parse_pci()
of/irq: do irq resolution in platform_get_irq_byname()
of: Add a testcase for of_find_node_by_path()
of: Make of_find_node_by_path() handle /aliases
of: Create unlocked version of for_each_child_of_node()
lib: add glibc style strchrnul() variant
of: Handle memory@0 node on PPC32 only
pci/of: Remove dead code
of: fix race between search and remove in of_update_property()
of: Use NULL for pointers
of: Stop naming platform_device using dcr address
of: Ensure unique names without sacrificing determinism
tty/serial: pl011: add DT based earlycon support
of/fdt: add FDT serial scanning for earlycon
of/fdt: add FDT address translation support
serial: earlycon: add DT support
...
Here is the big tty / serial driver pull request for 3.16-rc1.
A variety of different serial driver fixes and updates and additions,
nothing huge, and no real major core tty changes at all.
All have been in linux-next for a while.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Merge tag 'tty-3.16-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty into next
Pull tty/serial driver updates from Greg KH:
"Here is the big tty / serial driver pull request for 3.16-rc1.
A variety of different serial driver fixes and updates and additions,
nothing huge, and no real major core tty changes at all.
All have been in linux-next for a while"
* tag 'tty-3.16-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty: (84 commits)
Revert "serial: imx: remove the DMA wait queue"
serial: kgdb_nmi: Improve console integration with KDB I/O
serial: kgdb_nmi: Switch from tasklets to real timers
serial: kgdb_nmi: Use container_of() to locate private data
serial: cpm_uart: No LF conversion in put_poll_char()
serial: sirf: Fix compilation failure
console: Remove superfluous readonly check
console: Use explicit pointer type for vc_uni_pagedir* fields
vgacon: Fix & cleanup refcounting
ARM: tty: Move HVC DCC assembly to arch/arm
tty/hvc/hvc_console: Fix wakeup of HVC thread on hvc_kick()
drivers/tty/n_hdlc.c: replace kmalloc/memset by kzalloc
vt: emulate 8- and 24-bit colour codes.
printk/of_serial: fix serial console cessation part way through boot.
serial: 8250_dma: check the result of TX buffer mapping
serial: uart: add hw flow control support configuration
tty/serial: at91: add interrupts for modem control lines
tty/serial: at91: use mctrl_gpio helpers
tty/serial: Add GPIOLIB helpers for controlling modem lines
ARM: at91: gpio: implement get_direction
...
Here is the big staging driver pull request for 3.16-rc1.
Lots of stuff here, tons of cleanup patches, a few new drivers, and some
removed as well, but I think we are still adding a few thousand more
lines than we remove, due to the new drivers being bigger than the ones
deleted.
One notible bit of work did stand out, Jes Sorensen has gone on a tear,
fixing up a wireless driver to be "more sane" than it originally was
from the vendor, with over 500 patches merged here. Good stuff, and a
number of users laptops are better off for it.
All of this has been in linux-next for a while.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Merge tag 'staging-3.16-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging into next
Pull staging driver updates from Greg KH:
"Here is the big staging driver pull request for 3.16-rc1.
Lots of stuff here, tons of cleanup patches, a few new drivers, and
some removed as well, but I think we are still adding a few thousand
more lines than we remove, due to the new drivers being bigger than
the ones deleted.
One notible bit of work did stand out, Jes Sorensen has gone on a
tear, fixing up a wireless driver to be "more sane" than it originally
was from the vendor, with over 500 patches merged here. Good stuff,
and a number of users laptops are better off for it.
All of this has been in linux-next for a while"
* tag 'staging-3.16-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging: (1703 commits)
staging: skein: fix sparse warning for static declarations
staging/mt29f_spinand: coding style fixes
staging: silicom: fix sparse warning for static variable
staging: lustre: Fix coding style
staging: android: binder.c: Use more appropriate functions for euid retrieval
staging: lustre: fix integer as NULL pointer warnings
Revert "staging: dgap: remove unneeded kfree() in dgap_tty_register_ports()"
Staging: rtl8192u: r8192U_wx.c Fixed a misplaced brace
staging: ion: shrink highmem pages on kswapd
staging: ion: use compound pages on high order pages for system heap
staging: ion: remove struct ion_page_pool_item
staging: ion: simplify ion_page_pool_total()
staging: ion: tidy up a bit
staging: rtl8723au: Remove redundant casting in usb_ops_linux.c
staging: rtl8723au: Remove redundant casting in rtl8723a_hal_init.c
staging: rtl8723au: Remove redundant casting in rtw_xmit.c
staging: rtl8723au: Remove redundant casting in rtw_wlan_util.c
staging: rtl8723au: Remove redundant casting in rtw_sta_mgt.c
staging: rtl8723au: Remove redundant casting in rtw_recv.c
staging: rtl8723au: Remove redundant casting in rtw_mlme.c
...
SoC-near driver changes that we're merging through our tree. Mostly
because they depend on other changes we have staged, but in some cases
because the driver maintainers preferred that we did it this way.
This contains a largeish cleanup series of the omap_l3_noc bus driver,
cpuidle rework for Exynos, some reset driver conversions and a long
branch of TI EDMA fixes and cleanups, with more to come next release.
The TI EDMA cleanups is a shared branch with the dmaengine tree, with
a handful of Davinci-specific fixes on top.
After discussion at last year's KS (and some more on the mailing lists),
we are here adding a drivers/soc directory. The purpose of this is
to keep per-vendor shared code that's needed by different drivers but
that doesn't fit into the MFD (nor drivers/platform) model. We expect
to keep merging contents for this hierarchy through arm-soc so we can
keep an eye on what the vendors keep adding here and not making it a
free-for-all to shove in crazy stuff.
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Merge tag 'drivers-for-3.16' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc into next
Pull ARM SoC driver changes from Olof Johansson:
"SoC-near driver changes that we're merging through our tree. Mostly
because they depend on other changes we have staged, but in some cases
because the driver maintainers preferred that we did it this way.
This contains a largeish cleanup series of the omap_l3_noc bus driver,
cpuidle rework for Exynos, some reset driver conversions and a long
branch of TI EDMA fixes and cleanups, with more to come next release.
The TI EDMA cleanups is a shared branch with the dmaengine tree, with
a handful of Davinci-specific fixes on top.
After discussion at last year's KS (and some more on the mailing
lists), we are here adding a drivers/soc directory. The purpose of
this is to keep per-vendor shared code that's needed by different
drivers but that doesn't fit into the MFD (nor drivers/platform)
model. We expect to keep merging contents for this hierarchy through
arm-soc so we can keep an eye on what the vendors keep adding here and
not making it a free-for-all to shove in crazy stuff"
* tag 'drivers-for-3.16' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (101 commits)
cpufreq: exynos: Fix driver compilation with ARCH_MULTIPLATFORM
tty: serial: msm: Remove direct access to GSBI
power: reset: keystone-reset: introduce keystone reset driver
Documentation: dt: add bindings for keystone pll control controller
Documentation: dt: add bindings for keystone reset driver
soc: qcom: fix of_device_id table
ARM: EXYNOS: Fix kernel panic when unplugging CPU1 on exynos
ARM: EXYNOS: Move the driver to drivers/cpuidle directory
ARM: EXYNOS: Cleanup all unneeded headers from cpuidle.c
ARM: EXYNOS: Pass the AFTR callback to the platform_data
ARM: EXYNOS: Move S5P_CHECK_SLEEP into pm.c
ARM: EXYNOS: Move the power sequence call in the cpu_pm notifier
ARM: EXYNOS: Move the AFTR state function into pm.c
ARM: EXYNOS: Encapsulate the AFTR code into a function
ARM: EXYNOS: Disable cpuidle for exynos5440
ARM: EXYNOS: Encapsulate boot vector code into a function for cpuidle
ARM: EXYNOS: Pass wakeup mask parameter to function for cpuidle
ARM: EXYNOS: Remove ifdef for scu_enable in pm
ARM: EXYNOS: Move scu_enable in the cpu_pm notifier
ARM: EXYNOS: Use the cpu_pm notifier for pm
...
* Updated MSM uart driver to not access GSBI control registers
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Merge tag 'qcom-drivers-for-3.16-2' of git://git.kernel.org/pub/scm/linux/kernel/git/galak/linux-qcom into next/drivers
Merge "Qualcomm ARM Based driver Updates for v3.16-2" from Kumar Gala:
* Updated MSM uart driver to not access GSBI control registers
* tag 'qcom-drivers-for-3.16-2' of git://git.kernel.org/pub/scm/linux/kernel/git/galak/linux-qcom:
tty: serial: msm: Remove direct access to GSBI
Signed-off-by: Olof Johansson <olof@lixom.net>
This reverts commit e2f2786606.
Huang reports that this patch is broken and should be reverted.
Cc: Huang Shijie <b32955@freescale.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
kgdb_nmi_tty_enabled is used for two unrelated purposes, namely to
suppress normal TTY input handling and to suppress console output
(although it has no effect at all on TTY output). A much better way to
handle muting the console is to not have to mute it in the first place!
That's what this patch does.
Signed-off-by: Daniel Thompson <daniel.thompson@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
kgdb_nmi uses tasklets on the assumption they will not be scheduled
until the next timer tick. This assumption is invalid and can lead to
live lock, continually servicing the kgdb_nmi tasklet. This is fixed
by using the timer API instead.
Signed-off-by: Daniel Thompson <daniel.thompson@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This corrects a crash in kgdb_nmi_tty_shutdown() which occurs when
the function is called with port->tty set to NULL.
All conversions between struct tty_port and struct kgdb_nmi_tty_priv
have been switched to direct calls to container_of() to improve code
clarity and consistancy.
Signed-off-by: Daniel Thompson <daniel.thompson@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
In (c7d44a02a serial_core: Commonalize crlf when working w/ a non open
console port) the core was modified to make the UART poll_put_char()
automatically convert LF to CRLF. This driver's poll_put_char() adds a
CR itself and this was not disabled by the above patch meaning
currently it sends two CR characters.
The code to issue a character is shared by the console write code (where
driver must do LF to CRLF conversion, although it can make use of the
uart_console_write() helper function) and the poll_put_char (where
driver must not do the conversion). For that reason we add a flag rather
than simply rip out the conversion code.
Signed-off-by: Daniel Thompson <daniel.thompson@linaro.org>
Cc: Doug Anderson <dianders@chromium.org>
Cc: Jiri Slaby <jslaby@suse.cz>
Cc: Christophe Leroy <christophe.leroy@c-s.fr>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
After 07d410e0) serial: sirf: fix spinlock deadlock issue it is no longer
possiblet to compile this driver. The rename of one of the spinlocks is
faulty. After looking at the original patch I believe this is the correct
fix.
Compile tested using ARM's multi_v7_defconfig
Reported-by: Stephen Rothwell <sfr@canb.auug.org.au>
Cc: Jiri Slaby <jslaby@suse.cz>
Cc: Qipan Li <Qipan.Li@csr.com>
Signed-off-by: Daniel Thompson <daniel.thompson@linaro.org>
Acked-by: Barry Song <baohua@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This patch removes direct access of the GSBI registers. GSBI configuration
should be done through the GSBI driver directly.
Signed-off-by: Andy Gross <agross@codeaurora.org>
Signed-off-by: Kumar Gala <galak@codeaurora.org>
uni_pagedir.readonly is never set. Let's get rid of superfluous check
codes.
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
The vc_data.vc_uni_pagedir filed is currently long int, supposedly to
be served generically. This, however, leads to lots of cast to
pointer, and rather it worsens the readability significantly.
Actually, we have now only a single uni_pagedir map implementation,
and this won't change likely. So, it'd be much more simple and
error-prone to just use the exact pointer for struct uni_pagedir
instead of long.
Ditto for vc_uni_pagedir_loc. It's a pointer to the uni_pagedir, thus
it can be changed similarly to the exact type.
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Put architecture-specific assembly code where it belongs,
allowing for support of additional architectures such as arm64 in
the future.
Signed-off-by: Christopher Covington <cov@codeaurora.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Some backends call hvc_kick() to wakeup the HVC thread from its
slumber upon incoming characters. This however doesn't work
properly because it uses msleep_interruptible() which is mostly
immune to wake_up_process(). It will basically go back to sleep
until the timeout is expired (only signals can really wake it).
Replace it with a simple shedule_timeout_interruptible() instead,
which may wakeup earlier every now and then but we really don't
care in this case.
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Most other mainstream terminals support "xterm256" colours, which means
people sometimes use these blindly without checking capabilities.
Because of hardware limitations of VGA consoles, colours are downgraded to
16 foregrounds and 8 backgrounds. On fbdev consoles it would be possible
to support them without quality loss, but adding that would require quite a
large amount of code.
Signed-off-by: Adam Borowski <kilobyte@angband.pl>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Commit 5f5c9ae56c
"serial_core: Unregister console in uart_remove_one_port()"
fixed a crash where a serial port was removed but
not deregistered as a console.
There is a side effect of that commit for platforms having serial consoles
and of_serial configured (CONFIG_SERIAL_OF_PLATFORM). The serial console
is disabled midway through the boot process.
This cessation of the serial console affects PowerPC computers
such as the MVME5100 and SAM440EP.
The sequence is:
bootconsole [udbg0] enabled
....
serial8250/16550 driver initialises and registers its UARTS,
one of these is the serial console.
console [ttyS0] enabled
....
of_serial probes "platform" devices, registering them as it goes.
One of these is the serial console.
console [ttyS0] disabled.
The disabling of the serial console is due to:
a. unregister_console in printk not clearing the
CONS_ENABLED bit in the console flags,
even though it has announced that the console is disabled; and
b. of_platform_serial_probe in of_serial not setting the port type
before it registers with serial8250_register_8250_port.
This patch ensures that the serial console is re-enabled when of_serial
registers a serial port that corresponds to the designated console.
Signed-off-by: Stephen Chivers <schivers@csc.com>
Tested-by: Stephen Chivers <schivers@csc.com>
Acked-by: Geert Uytterhoeven <geert@linux-m68k.org> [unregister_console]
Cc: stable <stable@vger.kernel.org> # 3.15
===
The above failure was identified in Linux-3.15-rc2.
Tested using MVME5100 and SAM440EP PowerPC computers with
kernels built from Linux-3.15-rc5 and tty-next.
The continued operation of the serial console is vital for computers
such as the MVME5100 as that Single Board Computer does not
have any grapical/display hardware.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Using dma_mapping_error() to make sure the mapping did not
fail.
Signed-off-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
8250 uart driver currently supports only software assisted hw flow
control. The software assisted hw flow control maintains a hw_stopped
flag in the tty structure to stop and start transmission and use modem
status interrupt for the event to drive the handshake signals. This is
not needed if hw has flow control capabilities. This patch adds a
DT attribute for enabling hw flow control for a uart port. Also skip
stop and start if this flag is present in flag field of the port
structure.
Signed-off-by: Murali Karicheri <m-karicheri2@ti.com>
CC: Rob Herring <robh+dt@kernel.org>
CC: Pawel Moll <pawel.moll@arm.com>
CC: Mark Rutland <mark.rutland@arm.com>
CC: Ian Campbell <ijc+devicetree@hellion.org.uk>
CC: Kumar Gala <galak@codeaurora.org>
CC: Randy Dunlap <rdunlap@infradead.org>
CC: Jiri Slaby <jslaby@suse.cz>
CC: Santosh Shilimkar <santosh.shilimkar@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
On sam9x5, dedicated CTS (and RTS) pins are unusable together with the
LCDC, the EMAC, or the MMC because they share the same line.
Moreover, the USART controller doesn't handle DTR/DSR/DCD/RI signals,
so we have to control them via GPIO.
This patch permits to use GPIOs to control the CTS/RTS/DTR/DSR/DCD/RI
signals.
Signed-off-by: Richard Genoud <richard.genoud@gmail.com>
Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Acked-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This patch add some helpers to control modem lines (CTS/RTS/DSR...) via
GPIO.
This will be useful for many boards which have a serial controller that
only handle CTS/RTS pins (or even just RX/TX).
Signed-off-by: Richard Genoud <richard.genoud@gmail.com>
Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Tested-by: Yegor Yefremov <yegorslists@googlemail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This patch add IGNPAR flag handling for the driver.
Signed-off-by: Alexander Shiyan <shc_work@mail.ru>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
sccnxp_timer() is triggered only by timer, so there are no need to
check for timer_pending().
Signed-off-by: Alexander Shiyan <shc_work@mail.ru>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This patch disables the receiver ready interrupt for imx_stop_rx.
It reduces the interrupt numbers when the uart is going to close
or suspend.
Signed-off-by: Huang Shijie <b32955@freescale.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
The DMA wait queue makes the code very complicated:
For RX, the @->stop_rx hook does not really stop the RX;
For TX, the @->stop_tx hook does not really stop the TX.
The above make the imx_shutdown has to wait the RX/TX DMA to be finished.
In order to make code more simple, this patch removes the DMA wait queue.
By calling the dmaengine_terminate_all, this patch makes the RX stops
immediately after we call the @->stop_rx hook, so does the TX.
Signed-off-by: Huang Shijie <b32955@freescale.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
In the imx_startup(), we will reset the uart port which will reset all
the FIFOs, including the URXD.
So the code to clear the RX FIFO is redundant. Just remove it.
Signed-off-by: Huang Shijie <b32955@freescale.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Current code resets the uart port only when it supports the irda mode.
In actually, we also need to reset the uart port in the non-irda mode.
A hang was caught in the following case:
UART A transmits data to the other end. But the transmission maybe
terminated. In some corner case, the TX FIFO maybe not empty.
The kernel will hang at the imx_set_termios():
............................................................
while (!(readl(sport->port.membase + USR2) & USR2_TXDC))
barrier();
............................................................
This patch resets the uart port all the time in the imx_startup().
And fix the hang.
Signed-off-by: Huang Shijie <b32955@freescale.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Bit 7 of UCR3 is described in the i.MX reference manuals (with the exception
of i.MX1) as follows:
ADNIMP: Autobaud Detection Not Improved-. Disables new features of
autobaud detection (See Baud Rate Automatic Detection
Protocol, for more details).
0 Autobaud detection new features selected
1 Keep old autobaud detection mechanism
The "new features" mechanism occasionally cause the receiver to get out of sync
and continuously produce received characters of '\xff'.
In order to reproduce the problem:
$ stty -F /dev/ttymxc0 19200
- Change the terminal baudrate to 19200
- Type in the console and it should look good
- Change the terminal baudrate back to 115200
- Type 'b' in the console, then a stream of garbage characters is seen.
Also rename the bit definition as per the reference manual.
Tested on mx6q, mx6dl, mx6solo and mx53.
Based on a patch from Eric Nelson for U-boot.
Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>
Tested-by: Eric Nelson <eric.nelson@boundarydevices.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This Multi-IO card has one serial 16550-like and one parallel port connector.
Here's the lspci output, after this commit is applied:
03:07.0 Serial controller: Device 4348:5053 (rev 10) (prog-if 02 [16550])
Subsystem: Device 4348:5053
Control: I/O+ Mem- BusMaster- SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx-
Status: Cap- 66MHz- UDF- FastB2B- ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
Interrupt: pin A routed to IRQ 21
Region 0: I/O ports at cf00 [size=8]
Region 1: I/O ports at ce00 [size=8]
Kernel driver in use: parport_serial
Kernel modules: 8250_pci, parport_serial
This commit adds an entry with the device ID to the blacklist declared in
8250_pci to prevent the driver from taking ownership. Also, and as was done
for the 2S/1P variant, add a quirk to skip autodetection and set the correct
type to 16550A clone.
Proper entries are added to parport_serial, to support the device parallel
and serial ports.
Cc: Gianluca Anzolin <gianluca@sottospazio.it>
Cc: Alan Cox <alan@linux.intel.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Ezequiel Garcia <ezequiel.garcia@free-electrons.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Add missing specification of efm32_uart_exit as module_exit.
This fixes the following compilation warning:
drivers/tty/serial/efm32-uart.c:840:123: warning: ‘efm32_uart_exit’ defined but not used [-Wunused-function]
Signed-off-by: Vincent Stehlé <vincent.stehle@laposte.net>
Cc: Jiri Slaby <jslaby@suse.cz>
Acked-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Add format and argument checking and fix misuses in the dbg macro.
Add __printf
Use %pR for resource
Add #include guard to samsung.h
Move static functions from .h to .c
Use vscnprintf instead of length unguarded vsprintf
Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Don't activate the TX Space available IRQ on startup, or a simple
$ cat /dev/ttyHSU0
will cause an endless amount of IRQs, as there is always space in
the TX FIFO available if no data is going to be sent.
Also correct comments for IRQ names (RX and TX swapped).
Signed-off-by: Johannes Thumshirn <johannes.thumshirn@men.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
On my test platform (B2020/STiH416) the serial port issues bad characters
during the initial message avalanche as the console comes up. The problem
also occurs when dense(ish) I/O is done using the polled I/O interface.
The problem is fixed for me by using the FIFO half-empty bit rather than
FIFO full bit. Note that using the half-empty bit causes the FIFO to be
managed in a similar way to interrupt based I/O (i.e. where the hardware
gets best test coverage).
Running the FIFO half full will have no impact (good or bad) on console
performance. The UART will still remain fully saturated and the busy-wait
until the FIFO is empty in asc_console_write() will complete at the same
time.
Signed-off-by: Daniel Thompson <daniel.thompson@linaro.org>
Acked-by: Maxime Coquelin <maxime.coquelin@st.com>
Acked-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Xilinx MDM (Microblaze Debug Module) also contains
uart interface via JTAG which is compatible with
uartlite driver. This interface is really slow
that's why timeout is setup to 1s.
Make this time delay not to be cpu speed dependent.
Signed-off-by: Michal Simek <michal.simek@xilinx.com>
Acked-by: Peter Korsgaard <peter@korsgaard.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
If NO_DMA=y:
drivers/built-in.o: In function `lpuart_dma_rx_free':
fsl_lpuart.c:(.text+0x7da28): undefined reference to `dma_unmap_single'
drivers/built-in.o: In function `lpuart_dma_tx_free':
fsl_lpuart.c:(.text+0x7da60): undefined reference to `dma_unmap_single'
drivers/built-in.o: In function `lpuart_dma_rx':
fsl_lpuart.c:(.text+0x7dab8): undefined reference to `dma_sync_single_for_cpu'
drivers/built-in.o: In function `lpuart_dma_tx':
fsl_lpuart.c:(.text+0x7db7e): undefined reference to `dma_sync_single_for_cpu'
drivers/built-in.o: In function `lpuart_copy_rx_to_tty':
fsl_lpuart.c:(.text+0x7dcd4): undefined reference to `dma_sync_single_for_cpu'
make[3]: *** [vmlinux] Error 1
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
commit fb78b81142 provide a workaround for
kernel panic, but bring potential deadlock risk. that is in
sirfsoc_rx_tmo_process_tl while enter into sirfsoc_uart_pio_rx_chars
cpu hold uart_port->lock, if uart interrupt comes cpu enter into
sirfsoc_uart_isr and deadlock occurs in getting uart_port->lock.
the patch replace spin_lock version to spin_lock_irq* version to avoid
spinlock dead lock issue. let function tty_flip_buffer_push in tasklet
outof spin_lock_irq* protect area to avoid add the pair of spin_lock and
spin_unlock for tty_flip_buffer_push.
BTW drop self defined unused spinlock protect of tx_lock/rx_lock.
56274.220464] BUG: spinlock lockup suspected on CPU#0, swapper/0/0
[56274.223648] lock: 0xc05d9db0, .magic: dead4ead, .owner: swapper/0/0,
.owner_cpu: 0
[56274.231278] CPU: 0 PID: 0 Comm: swapper/0 Tainted: G
O 3.10.35 #1
[56274.238241] [<c0015530>] (unwind_backtrace+0x0/0xf4) from
[<c00120d8>] (show_stack+0x10/0x14)
[56274.246742] [<c00120d8>] (show_stack+0x10/0x14) from
[<c01b11b0>] (do_raw_spin_lock+0x110/0x184)
[56274.255501] [<c01b11b0>] (do_raw_spin_lock+0x110/0x184) from
[<c02124c8>] (sirfsoc_uart_isr+0x20/0x42c)
[56274.264874] [<c02124c8>] (sirfsoc_uart_isr+0x20/0x42c) from
[<c0075790>] (handle_irq_event_percpu+0x54/0x17c)
[56274.274758] [<c0075790>] (handle_irq_event_percpu+0x54/0x17c)
from [<c00758f4>] (handle_irq_event+0x3c/0x5c)
[56274.284561] [<c00758f4>] (handle_irq_event+0x3c/0x5c) from
[<c0077fa0>] (handle_level_irq+0x98/0xfc)
[56274.293670] [<c0077fa0>] (handle_level_irq+0x98/0xfc) from
[<c0074f44>] (generic_handle_irq+0x2c/0x3c)
[56274.302952] [<c0074f44>] (generic_handle_irq+0x2c/0x3c) from
[<c000ef80>] (handle_IRQ+0x40/0x90)
[56274.311706] [<c000ef80>] (handle_IRQ+0x40/0x90) from
[<c000dc80>] (__irq_svc+0x40/0x70)
[56274.319697] [<c000dc80>] (__irq_svc+0x40/0x70) from
[<c038113c>] (_raw_spin_unlock_irqrestore+0x10/0x48)
[56274.329158] [<c038113c>]
(_raw_spin_unlock_irqrestore+0x10/0x48) from [<c0200034>]
(tty_port_tty_get+0x58/0x90)
[56274.339213] [<c0200034>] (tty_port_tty_get+0x58/0x90) from
[<c0212008>] (sirfsoc_uart_pio_rx_chars+0x1c/0xc8)
[56274.349097] [<c0212008>]
(sirfsoc_uart_pio_rx_chars+0x1c/0xc8) from [<c0212ef8>]
(sirfsoc_rx_tmo_process_tl+0xe4/0x1fc)
[56274.359853] [<c0212ef8>]
(sirfsoc_rx_tmo_process_tl+0xe4/0x1fc) from [<c0027c04>]
(tasklet_action+0x84/0x114)
[56274.369739] [<c0027c04>] (tasklet_action+0x84/0x114) from
[<c0027db4>] (__do_softirq+0x120/0x200)
[56274.378585] [<c0027db4>] (__do_softirq+0x120/0x200) from
[<c0027f44>] (do_softirq+0x54/0x5c)
[56274.386998] [<c0027f44>] (do_softirq+0x54/0x5c) from
[<c00281ec>] (irq_exit+0x9c/0xd0)
[56274.394899] [<c00281ec>] (irq_exit+0x9c/0xd0) from
[<c000ef84>] (handle_IRQ+0x44/0x90)
[56274.402790] [<c000ef84>] (handle_IRQ+0x44/0x90) from
[<c000dc80>] (__irq_svc+0x40/0x70)
[56274.410774] [<c000dc80>] (__irq_svc+0x40/0x70) from
[<c0288af4>] (cpuidle_enter_state+0x50/0xe0)
[56274.419532] [<c0288af4>] (cpuidle_enter_state+0x50/0xe0) from
[<c0288c34>] (cpuidle_idle_call+0xb0/0x148)
[56274.429080] [<c0288c34>] (cpuidle_idle_call+0xb0/0x148) from
[<c000f3ac>] (arch_cpu_idle+0x8/0x38)
[56274.438016] [<c000f3ac>] (arch_cpu_idle+0x8/0x38) from
[<c0059344>] (cpu_startup_entry+0xfc/0x140)
[56274.446956] [<c0059344>] (cpu_startup_entry+0xfc/0x140) from
[<c04a3a54>] (start_kernel+0x2d8/0x2e4)
Signed-off-by: Qipan Li <Qipan.Li@csr.com>
Signed-off-by: Barry Song <Baohua.Song@csr.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
All SiRFSoC UART registers are in 32-bits. If we use writeb for
TXFIFO, actually all of 32-bits are still written, for TXTIFO,
only low 8-bits are valid, so in prima2&atlas6, this causes no
problem.
But in the new atlas7, using writeb to write UART registers will
cause an imprecise data abort as HW does check the "wrong" writeb.
So move to writel and this also makes the code consistent with
sirfsoc_uart_pio_tx_chars() in which we use writel.
Signed-off-by: Barry Song <Baohua.Song@csr.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Two new drivers have been added since 3.14, the MEN 16z135 uart, and
the ARM semihosting console. Both are missing an explicit 'select
SERIAL_CORE', which can leads build errors when no other driver
selects the core, as found during ARM randconfig testing.
In case of the ARM semihosting console, we also have to select
SERIAL_CORE_CONSOLE.
This adds the missing 'select' statements.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This fixes the warnings:
drivers/tty/serial/sc16is7xx.c: In function 'sc16is7xx_handle_rx':
>> drivers/tty/serial/sc16is7xx.c:548:1: warning: 'sc16is7xx_handle_rx' uses dynamic stack allocation [enabled by default]
drivers/tty/serial/sc16is7xx.c: In function 'sc16is7xx_handle_tx':
>> drivers/tty/serial/sc16is7xx.c:589:1: warning: 'sc16is7xx_handle_tx' uses dynamic stack allocation [enabled by default]
Signed-off-by: Jon Ringle <jringle@gridpoint.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
drivers/tty/serial/sc16is7xx.c:1060:12: warning: 'sc16is7xx_probe' defined but not used [-Wunused-function]
static int sc16is7xx_probe(struct device *dev,
^
drivers/tty/serial/sc16is7xx.c:1176:12: warning: 'sc16is7xx_remove' defined but not used [-Wunused-function]
static int sc16is7xx_remove(struct device *dev)
^
drivers/tty/serial/sc16is7xx.c:1215:29: warning: 'regcfg' defined but not used [-Wunused-variable]
static struct regmap_config regcfg = {
^
Fixed these warnings by removing the `#ifdef CONFIG_REGMAP_I2C' around their
calls as this driver selects REGMAP_I2C in Kconfig. This part of driver just
didn't compile at all when REGMAP_I2C configured as module (CONFIG_REGMAP_I2C
is not defined, just CONFIG_REGMAP_I2C_MODULE).
Signed-off-by: Jan Moskyto Matejka <mq@suse.cz>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
On initialization failure, an error message is already printed with
level KERN_ERR, no need to print another one with level KERN_INFO.
Signed-off-by: Jean Delvare <jdelvare@suse.de>
Cc: Jiri Slaby <jslaby@suse.cz>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
The pch_uart driver is for a companion chip to the Intel Atom E600
series processors. These are 32-bit x86 processors so the driver is
only needed on X86_32. Add COMPILE_TEST as an alternative, so that the
driver can still be build-tested elsewhere.
Signed-off-by: Jean Delvare <jdelvare@suse.de>
Cc: Jiri Slaby <jslaby@suse.cz>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This function is largely a duplicate of paste_selection() in
drivers/tty/vt/selection.c, but with its own selection state. The
speakup selection mechanism should really be merged with vt.
For now, apply the changes from 'TTY: vt, fix paste_selection ldisc
handling', 'tty: Make ldisc input flow control concurrency-friendly',
and 'tty: Fix unsafe vt paste_selection()'.
References: https://bugs.debian.org/735202
References: https://bugs.debian.org/744015
Reported-by: Paul Gevers <elbrus@debian.org>
Reported-and-tested-by: Jarek Czekalski <jarekczek@poczta.onet.pl>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Cc: <stable@vger.kernel.org> # v3.8 but needs backporting for < 3.12
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This resolves the conflicts in the files:
drivers/iio/adc/Kconfig
drivers/staging/rtl8723au/os_dep/usb_ops_linux.c
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Enable DT based earlycon initialization for the pl011 uart.
Signed-off-by: Rob Herring <robh@kernel.org>
Cc: Russell King <linux@arm.linux.org.uk>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Jiri Slaby <jslaby@suse.cz>
Acked-by: Grant Likely <grant.likely@linaro.org>
This adds the infrastructure to generic earlycon for earlycon setup
using DT. The actual setup is not enabled until a following commit to
add the FDT parsing.
Signed-off-by: Rob Herring <robh@kernel.org>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Jiri Slaby <jslaby@suse.cz>
Cc: Arnd Bergmann <arnd@arndb.de>
Acked-by: Grant Likely <grant.likely@linaro.org>
No functional change. Just convert to the new interface.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Grant Likely <grant.likely@linaro.org>
Cc: Tony Luck <tony.luck@intel.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Acked-by: Chris Metcalf <cmetcalf@tilera.com>
Link: http://lkml.kernel.org/r/20140507154337.873477334@linutronix.de
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
No functional change. Just convert to the new interface.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Grant Likely <grant.likely@linaro.org>
Cc: Tony Luck <tony.luck@intel.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Acked-by: Chris Metcalf <cmetcalf@tilera.com>
Link: http://lkml.kernel.org/r/20140507154337.643399187@linutronix.de
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Mostly spacing changes, also making the operations structure const
Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
xinhui.pan