cfi_amdstd_sync() and cfi_staa_sync() call schedule() without changing task's
state appropriately.
In case of e.g. chip->state == FL_ERASING, cfi_*_sync() will be busy-looping
either redundantly for a fixed interval of time (for SCHED_NORMAL tasks) or
possibly endlessly (for RT tasks and UP).
Signed-off-by: Dmitry Adamushko <dmitry.adamushko@gmail.com>
Cc: David Woodhouse <dwmw2@infradead.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
THe CFI driver in 2.6.24 kernel is broken. Not so intensive read/write
operations cause incomplete writes which lead to kernel panics in JFFS2.
We investigated the issue - it is caused by bug in FL_SHUTDOWN parsing code.
Sometimes chip returns -EIO as if it is in FL_SHUTDOWN state when it should
wait in FL_PONT (error in order of conditions).
The following patch fixes the bug in state parsing code of CFI. Also I've
added comments to notify developers if they want to add new case in future.
Signed-off-by: Alexey Korolev <akorolev@infradead.org>
Reviewed-by: Joern Engel <joern@logfs.org>
Cc: David Woodhouse <dwmw2@infradead.org>
Cc: <stable@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
# reboot
...
[ 42.351266] Flash device refused suspend due to active operation (state 0)
[ 42.358195] Unable to handle kernel NULL pointer dereference at virtual address 00000078
[ 42.360060] pgd = c7d9c000
[ 42.362769] [00000078] *pgd=a7d8d031, *pte=00000000, *ppte=00000000
[ 42.372902] Internal error: Oops: 17 [#1]
[ 42.376911] Modules linked in:
[ 42.379980] CPU: 0 Not tainted (2.6.25-rc2-10642-ge8f2594-dirty #73)
[ 42.380000] PC is at physmap_flash_shutdown+0x28/0x54
...
[ 42.380000] Backtrace:
[ 42.380000] [<c0130c1c>] (physmap_flash_shutdown+0x0/0x54) from [<c01207c0>] (platform_drv_shutdown+0x20/0x24)
[ 42.380000] r5:28121969 r4:c0229e08
[ 42.380000] [<c01207a0>] (platform_drv_shutdown+0x0/0x24) from [<c011cd40>] (device_shutdown+0x60/0x88)
[ 42.380000] [<c011cce0>] (device_shutdown+0x0/0x88) from [<c003e8a4>] (kernel_restart_prepare+0x2c/0x3c)
[ 42.380000] r4:00000000
[ 42.380000] [<c003e878>] (kernel_restart_prepare+0x0/0x3c) from [<c003ea00>] (kernel_restart+0x14/0x48)
[ 42.380000] [<c003e9ec>] (kernel_restart+0x0/0x48) from [<c003fdc0>] (sys_reboot+0xe8/0x1f8)
[ 42.380000] r4:01234567
[ 42.380000] [<c003fcd8>] (sys_reboot+0x0/0x1f8) from [<c001aa00>] (ret_fast_syscall+0x0/0x2c)
[ 42.380000] r7:00000058 r6:00000004 r5:00000001 r4:00000000
[ 42.380000] Code: 0a000009 e7953004 e1a00003 e1a0e00f (e593f078)
[ 42.650051] ---[ end trace 6d6c26a0fc3141de ]---
Segmentation fault
INIT: no more processes left in this runlevel
While looping for mtd[i]s, we should stop at the mtd[i] == NULL.
This patch also removes unnecessary "if (info)" checks:
suspend/resume/shutdown ops are executed only if probe() is succeeded, so info
is guaranteed to be !NULL.
Signed-off-by: Anton Vorontsov <cbouatmailru@gmail.com>
Cc: David Brownell <david-b@pacbell.net>
Cc: David Woodhouse <dwmw2@infradead.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This has been forgotten in commit f5bbdacc41 ("[MTD] NAND Modularize
read function") and nobody compiled the driver.
Signed-off-by: Sebastian Siewior <bigeasy@linutronix.de>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: David Woodhouse <dwmw2@infradead.org>
Cc: Joern Engel <joern@wh.fh-wedel.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
The block2mtd driver (drivers/mtd/devices/block2mtd.c) will kfree an on-stack
pointer when handling an invalid argument line (e.g.
block2mtd=/dev/loop0,xxx).
The kfree was added some time ago when "name" was dynamically allocated.
Signed-off-by: Ingo van Lil <inguin@gmx.de>
Acked-by: Joern Engel <joern@lazybastard.org>
Cc: David Woodhouse <dwmw2@infradead.org>
Cc: <stable@kernel.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This patch fixes a memory leak introduced by commit
4ccf8cffa9 and spotted by the Coverity
checker.
Signed-off-by: Adrian Bunk <bunk@kernel.org>
Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
In C, signed 1-bit bitfields can only take the values 0 and -1, only 0 and 1
are ever assigned in current code. Make them unsigned bitfields.
Fixes the (repeated) sparse errors:
drivers/mtd/ubi/ubi.h:220:15: error: dubious one-bit signed bitfield
drivers/mtd/ubi/ubi.h:221:17: error: dubious one-bit signed bitfield
drivers/mtd/ubi/ubi.h:222:18: error: dubious one-bit signed bitfield
drivers/mtd/ubi/ubi.h:223:16: error: dubious one-bit signed bitfield
drivers/mtd/ubi/ubi.h:224:20: error: dubious one-bit signed bitfield
Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com>
Cc: Artem Bityutskiy <dedekind@infradead.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
drivers/mtd/ubi/vmt.c: In function `ubi_create_volume':
drivers/mtd/ubi/vmt.c:379: warning: statement with no effect
Signed-off-by: S.Çağlar Onur <caglar@pardus.org.tr>
Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
* Add path_put() functions for releasing a reference to the dentry and
vfsmount of a struct path in the right order
* Switch from path_release(nd) to path_put(&nd->path)
* Rename dput_path() to path_put_conditional()
[akpm@linux-foundation.org: fix cifs]
Signed-off-by: Jan Blunck <jblunck@suse.de>
Signed-off-by: Andreas Gruenbacher <agruen@suse.de>
Acked-by: Christoph Hellwig <hch@lst.de>
Cc: <linux-fsdevel@vger.kernel.org>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Steven French <sfrench@us.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This is the central patch of a cleanup series. In most cases there is no good
reason why someone would want to use a dentry for itself. This series reflects
that fact and embeds a struct path into nameidata.
Together with the other patches of this series
- it enforced the correct order of getting/releasing the reference count on
<dentry,vfsmount> pairs
- it prepares the VFS for stacking support since it is essential to have a
struct path in every place where the stack can be traversed
- it reduces the overall code size:
without patch series:
text data bss dec hex filename
5321639 858418 715768 6895825 6938d1 vmlinux
with patch series:
text data bss dec hex filename
5320026 858418 715768 6894212 693284 vmlinux
This patch:
Switch from nd->{dentry,mnt} to nd->path.{dentry,mnt} everywhere.
[akpm@linux-foundation.org: coding-style fixes]
[akpm@linux-foundation.org: fix cifs]
[akpm@linux-foundation.org: fix smack]
Signed-off-by: Jan Blunck <jblunck@suse.de>
Signed-off-by: Andreas Gruenbacher <agruen@suse.de>
Acked-by: Christoph Hellwig <hch@lst.de>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Casey Schaufler <casey@schaufler-ca.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Implements kernel command line partitioning support for the CS5535/CS5536 chipsets driver.
For that the following is done:
* cs553x_cleanup(): try the cleanup for all chip selects to not leak memory
* Assign a unique name for each chip select to be separately addressable in the command line mtd-id portion(s)
* Use the already defined PIN_OPT_IDE constant where appropriate for readability
* Include command line partitioning support when CONFIG_MTD_PARTS is set
Signed-off-by: Mart Raudsepp <mart.raudsepp@artecdesign.ee>
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
* git://git.infradead.org/mtd-2.6: (120 commits)
[MTD] Fix mtdoops.c compilation
[MTD] [NOR] fix startup lock when using multiple nor flash chips
[MTD] [DOC200x] eccbuf is statically defined and always evaluate to true
[MTD] Fix maps/physmap.c compilation with CONFIG_PM
[MTD] onenand: Add panic_write function to the onenand driver
[MTD] mtdoops: Use the panic_write function when present
[MTD] Add mtd panic_write function pointer
[MTD] [NAND] Freescale enhanced Local Bus Controller FCM NAND support.
[MTD] physmap.c: Add support for multiple resources
[MTD] [NAND] Fix misparenthesization introduced by commit 78b65179...
[MTD] [NAND] Fix Blackfin NFC ECC calculating bug with page size 512 bytes
[MTD] [NAND] Remove wrong operation in PM function of the BF54x NFC driver
[MTD] [NAND] Remove unused variable in plat_nand_remove
[MTD] Unlocking all Intel flash that is locked on power up.
[MTD] [NAND] at91_nand: Make mtdparts option can override board info
[MTD] mtdoops: Various minor cleanups
[MTD] mtdoops: Ensure sequential write to the buffer
[MTD] mtdoops: Perform write operations in a workqueue
[MTD] mtdoops: Add further error return code checking
[MTD] [NOR] Test devtype, not definition in flash_probe(), drivers/mtd/devices/lart.c
...
drivers/mtd/mtdoops.c: In function ‘mtdoops_console_sync’:
drivers/mtd/mtdoops.c:329: error: implicit declaration of function ‘in_interrupt’
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
Taken from http://bugzilla.kernel.org/show_bug.cgi?id=9829
I found and solved the problem, at line 115 of drivers/mtd/chips/gen_probe.c
(kernel 2.6.24): mapsize value must be calculated in bytes, not in long.
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
Signed-off-by: Samuel Tardieu <sam@rfc1149.net>
Acked-by: Joern Engel <joern@logfs.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
Implement the panic_write function for the onenand driver. This waits
for any active command to complete/timeout, performs the write, waits
for it to complete and then returns.
Signed-off-by: Richard Purdie <rpurdie@rpsys.net>
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
When the MTD provides a panic_write function, use it.
Signed-off-by: Richard Purdie <rpurdie@rpsys.net>
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
MTDs are well suited for logging critical data and the mtdoops driver
allows kernel panics/oops to be written to flash in a blackbox flight
recorder fashion allowing better debugging and analysis of crashes.
Any kernel oops in user context can be easily handled since the kernel
continues as normal and any queued mtd writes are scheduled. Any kernel
oops in interrupt context results in a panic and the delayed writes will
not be scheduled however. The existing mtd->write function cannot be
called in interrupt context so these messages can never be written to
flash.
This patch adds a panic_write function pointer that drivers can
optionally implement which can be called in interrupt context. It is
only intended to be called when its known the kernel is about to panic
and we need to write to succeed. Since the kernel is not going to be
running for much longer, this function can break locks and delay to
ensure the write succeeds (but not sleep).
Signed-off-by: Richard Purdie <rpurdie@rpsys.net>
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
Signed-off-by: Nick Spence <nick.spence@freescale.com>
Signed-off-by: Scott Wood <scottwood@freescale.com>
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
I have been prime author and maintainer of block2mtd from day one, but
neither MAINTAINERS nor the module source makes this fact clear. And while
I'm at it, update my email addresses tree-wide, as the old address
currently bounces and change my name to "joern" as unicode will likely
continue to cause trouble until the end of this century.
Signed-off-by: Joern Engel <joern@lazybastard.org>
Cc: David Woodhouse <dwmw2@infradead.org>
Cc: Andy Whitcroft <apw@shadowen.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This patch extends the physmap mapping driver to support multiple
resources for non-identical NOR chips that will be concatenated together
when selected.
This is needed for example for Intel 48F4400 512MBit chips, since they
consist of 2 single different NOR chips with different geometries. The
first (lower) one has botton boot sectors and the 2nd (upper) has top
boot sectors. This currently isn't handled correctly by calling the
physmap driver once with only one resource covering both chips in one
memory region. The same geometrie is used for both chips.
With this patch the following resource structure can be used to
describe the 48F4400 chip correctly:
static struct resource board_nor_resource[] = {
[0] = {
.start = 0xf8000000,
.end = 0xfbffffff,
.flags = IORESOURCE_MEM,
},
[1] = {
.start = 0xfc000000,
.end = 0xffffffff,
.flags = IORESOURCE_MEM,
}
};
Signed-off-by: Stefan Roese <sr@denx.de>
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
There is no suspend/resume operation in NFC driver at all, currently.
Signed-off-by: Bryan Wu <bryan.wu@analog.com>
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
With CONFIG_MTD_PARTITIONS not set, got this:
drivers/mtd/nand/plat_nand.c:113: warning: unused variable 'pdata'
Signed-off-by: Li Zefan <lizf@cn.fujitsu.com>
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
Patch for unlocking all Intel flash that has instant locking on power up.
The patch has been tested on Intel M18, P30 and J3D Strata Flash.
1. The automatic unlocking can be disabled for a particular partition
in the map or the command line.
a. For the bit mask in the map it should look like:
.mask_flags = MTD_POWERUP_LOCK,
b. For the command line parsing it should look like:
mtdparts=0x80000(bootloader)lk
2. This will only unlock parts with instant individual block locking.
Intel parts with legacy unlocking will not be unlocked.
Signed-off-by: Justin Treon <justin_treon@yahoo.com>
Signed-off-by: Jared Hulbert <jaredeh@gmail.com>
Acked-by: Nicolas Pitre <nico@cam.org>
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
Call parse_mtd_partitions before checking board's partition_info, so
that "mtdparts=" option can override board's default setting.
Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
Various minor cleaups to mtdoops:
* Don't support the mtd->erasesize < OOPS_PAGE_SIZE case
* Tweak printks and make the device mtdoops connects to more visible
* CON_PRINTBUFFER flag is uneeded
Signed-off-by: Richard Purdie <rpurdie@rpsys.net>
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
Add a spinlock to ensure writes to the mtdoops buffer memory are
sequential and don't race.
Signed-off-by: Richard Purdie <rpurdie@rpsys.net>
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
Writing to the flash needs to be done in a workqueue. The console
write functions may be called in any context which can lead to
lockups otherwise.
Signed-off-by: Richard Purdie <rpurdie@rpsys.net>
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
Add further error return code checks to the mtdoops driver.
Signed-off-by: Richard Purdie <rpurdie@rpsys.net>
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
drivers/mtd/devices/lart.c:119:#define FLASH_DEVICE_16mbit_BOTTOM 0x88f488f4
As was, unless "manufacturer != FLASH_MANUFACTURER" this returned true
Signed-off-by: Roel Kluin <12o3l@tiscali.nl>
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
drivers/mtd/ubi/scan.c: In function 'ubi_scan':
drivers/mtd/ubi/scan.c:772: warning: 'ec' may be used uninitialized in this function
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
drivers/mtd/ubi/wl.c:746: warning: 'pe' may be used uninitialized in this function
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
This is just not necessary. We re-write whole layout copy, so
the old contents cannot show up again sice scan process will
drop it.
Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
In function onenand_verify_oob, local variable oobbuf shall be unsigned char.
In the case of a value is >= 0x80, it's unequal in comparing the value in an unsigned char and signed char.
Signed-off-by: Sheng Yongjie (Sam) <samsheng@trident.com.cn>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Dmitry Adamushko