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OpenCloudOS-Kernel/drivers/tty/serial
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Tony Lindgren f112530109 serial: core: Fix runtime PM handling for pending tx 
commit 6f699743aebf07538e506a46c5965eb8bdd2c716 upstream.

Richard reported that a serial port may end up sometimes with tx data
pending in the buffer for long periods of time.

Turns out we bail out early on any errors from pm_runtime_get(),
including -EINPROGRESS. To fix the issue, we need to ignore -EINPROGRESS
as we only care about the runtime PM usage count at this point. We check
for an active runtime PM state later on for tx.

Fixes: 84a9582fd2 ("serial: core: Start managing serial controllers to enable runtime PM")
Cc: stable <stable@kernel.org>
Reported-by: Richard Purdie <richard.purdie@linuxfoundation.org>
Cc: Bruce Ashfield <bruce.ashfield@gmail.com>
Cc: Mikko Rapeli <mikko.rapeli@linaro.org>
Cc: Paul Gortmaker <paul.gortmaker@windriver.com>
Cc: Randy MacLeod <randy.macleod@windriver.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
Tested-by: Richard Purdie <richard.purdie@linuxfoundation.org>
Link: https://lore.kernel.org/r/20231023074856.61896-1-tony@atomide.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
 		2023-11-08 11:56:24 +01:00
..
8250 tty: 8250: Add Brainboxes Oxford Semiconductor-based quirks 2023-11-08 11:56:24 +01:00
jsm drivers: serial: jsm: fix some leaks in probe 2022-09-22 16:11:43 +02:00
21285.c serial: drivers: switch ch and flag to u8 2023-07-25 19:21:04 +02:00
Kconfig TTY/Serial driver updates for 6.5-rc1. 2023-07-03 13:14:58 -07:00
Makefile serial: cpm_uart: Remove cpm_uart/ subdirectory 2023-08-04 15:08:30 +02:00
altera_jtaguart.c serial: altera_jtaguart: switch status to u32 2023-07-31 17:16:05 +02:00
altera_uart.c serial: drivers: switch ch and flag to u8 2023-07-25 19:21:04 +02:00
amba-pl010.c serial: drivers: switch ch and flag to u8 2023-07-25 19:21:04 +02:00
amba-pl011.c tty: Explicitly include correct DT includes 2023-07-25 20:19:05 +02:00
apbuart.c tty: Explicitly include correct DT includes 2023-07-25 20:19:05 +02:00
apbuart.h
…
ar933x_uart.c serial: ar933x: Use devm_platform_get_and_ioremap_resource() 2023-07-25 20:25:52 +02:00
arc_uart.c serial: drivers: switch ch and flag to u8 2023-07-25 19:21:04 +02:00
atmel_serial.c tty: Explicitly include correct DT includes 2023-07-25 20:19:05 +02:00
atmel_serial.h tty: serial: atmel: Use FIELD_PREP/FIELD_GET 2022-09-22 16:32:25 +02:00
bcm63xx_uart.c serial: bcm63xx-uart: Use devm_platform_get_and_ioremap_resource() 2023-07-25 20:25:52 +02:00
clps711x.c serial: clps711x: Use devm_platform_get_and_ioremap_resource() 2023-07-25 20:25:52 +02:00
cpm_uart.c serial: cpm_uart: Remove cpm_uart/ subdirectory 2023-08-04 15:08:30 +02:00
cpm_uart.h serial: cpm_uart: Remove cpm_uart/ subdirectory 2023-08-04 15:08:30 +02:00
digicolor-usart.c serial: drivers: switch ch and flag to u8 2023-07-25 19:21:04 +02:00
dz.c serial: drivers: switch ch and flag to u8 2023-07-25 19:21:04 +02:00
dz.h
…
earlycon-riscv-sbi.c serial: make uart_console_write->putchar()'s character an unsigned char 2022-03-03 15:06:31 +01:00
earlycon-semihost.c serial: Rename earlycon semihost driver 2023-01-19 14:58:19 +01:00
earlycon.c earlycon: Let users set the clock frequency 2023-01-19 14:56:44 +01:00
fsl_linflexuart.c serial: linflexuart: Use devm_platform_get_and_ioremap_resource() 2023-07-25 20:25:52 +02:00
fsl_lpuart.c Merge commit b320441c04 ("Merge tag 'tty-6.5-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty") into tty-next 2023-08-20 14:29:37 +02:00
icom.c serial: Make ->set_termios() old ktermios const 2022-08-30 14:22:35 +02:00
imx.c serial: imx: Use devm_platform_get_and_ioremap_resource() 2023-07-25 20:26:07 +02:00
imx_earlycon.c serial: make uart_console_write->putchar()'s character an unsigned char 2022-03-03 15:06:31 +01:00
ip22zilog.c serial: drivers: switch ch and flag to u8 2023-07-25 19:21:04 +02:00
ip22zilog.h
…
kgdb_nmi.c tty: make tty_operations::write()'s count size_t 2023-08-11 21:12:46 +02:00
kgdboc.c tty: serial: kgdboc: fix mutex locking order for configure_kgdboc() 2023-01-16 16:44:53 +01:00
lantiq.c tty: Explicitly include correct DT includes 2023-07-25 20:19:05 +02:00
liteuart.c tty: Explicitly include correct DT includes 2023-07-25 20:19:05 +02:00
lpc32xx_hs.c tty: serial: use uart_port_tx() helper 2022-11-03 03:32:40 +01:00
ma35d1_serial.c tty: serial: Remove redundant initialization for ma35d1serial_driver 2023-08-03 09:51:46 +02:00
max310x.c serial: max310x: fix typos in comments 2023-08-04 15:08:09 +02:00
max3100.c serial: drivers: switch ch and flag to u8 2023-07-25 19:21:04 +02:00
mcf.c serial: drivers: switch ch and flag to u8 2023-07-25 19:21:04 +02:00
men_z135_uart.c serial: men_z135_uart: Use uart_xmit_advance() 2022-11-03 03:35:41 +01:00
meson_uart.c Revert "tty: serial: meson: Add a earlycon for the T7 SoC" 2023-08-27 11:43:01 +02:00
milbeaut_usio.c serial: drivers: switch ch and flag to u8 2023-07-25 19:21:04 +02:00
mpc52xx_uart.c tty: Explicitly include correct DT includes 2023-07-25 20:19:05 +02:00
mps2-uart.c serial: mps2-uart: Use devm_platform_get_and_ioremap_resource() 2023-07-25 20:26:06 +02:00
msm_serial.c serial: msm: add lock annotation to msm_set_baud_rate() 2023-01-19 15:53:09 +01:00
mux.c tty: serial: use uart_port_tx_limited() 2022-11-03 03:32:40 +01:00
mvebu-uart.c serial: mvebu-uart: Use devm_platform_get_and_ioremap_resource() 2023-07-25 20:26:07 +02:00
mxs-auart.c tty: Explicitly include correct DT includes 2023-07-25 20:19:05 +02:00
omap-serial.c TTY/Serial driver changes for 6.6-rc1 2023-09-01 09:38:00 -07:00
owl-uart.c tty: serial: use uart_port_tx() helper 2022-11-03 03:32:40 +01:00
pch_uart.c tty: pcn_uart: fix memory leak with using debugfs_lookup() 2023-02-08 13:09:55 +01:00
pic32_uart.c tty: Explicitly include correct DT includes 2023-07-25 20:19:05 +02:00
pmac_zilog.c serial: pmac_zilog: Use uart_xmit_advance() 2022-11-03 03:35:42 +01:00
pmac_zilog.h serial: pmac_zilog: remove unused uart_pmac_port::termios_cache 2022-05-19 18:23:19 +02:00
pxa.c serial: drivers: switch ch and flag to u8 2023-07-25 19:21:04 +02:00
qcom_geni_serial.c tty: serial: qcom-geni-serial: Poll primary sequencer irq status after cancel_tx 2023-08-09 14:15:28 +02:00
rda-uart.c serial: rda: Use uart_xmit_advance() 2022-11-03 03:35:42 +01:00
rp2.c serial: drivers: switch ch and flag to u8 2023-07-25 19:21:04 +02:00
sa1100.c serial: drivers: switch ch and flag to u8 2023-07-25 19:21:04 +02:00
samsung_tty.c tty: serial: samsung: Set missing PM ops for hibernation support 2023-08-04 15:06:24 +02:00
sb1250-duart.c serial: drivers: switch ch and flag to u8 2023-07-25 19:21:04 +02:00
sc16is7xx.c serial: sc16is7xx: add missing support for rs485 devicetree properties 2023-08-22 15:30:00 +02:00
sccnxp.c serial: sccnxp: Use devm_platform_get_and_ioremap_resource() 2023-07-25 20:26:07 +02:00
serial-tegra.c serial: tegra: handle clk prepare error in tegra_uart_hw_init() 2023-08-22 15:29:18 +02:00
serial_base.h serial: core: Fix serial core port id, including multiport devices 2023-08-11 21:19:22 +02:00
serial_base_bus.c serial: core: Fix serial core port id, including multiport devices 2023-08-11 21:19:22 +02:00
serial_core.c serial: core: Fix runtime PM handling for pending tx 2023-11-08 11:56:24 +01:00
serial_ctrl.c serial: core: Start managing serial controllers to enable runtime PM 2023-05-31 10:46:59 +01:00
serial_mctrl_gpio.c Documentation: serial: move GPIO kernel-doc to the functions 2022-07-28 10:37:42 +02:00
serial_mctrl_gpio.h serial: mctrl_gpio: add a new API to enable / disable wake_irq 2022-02-08 11:07:16 +01:00
serial_port.c serial: core: Start managing serial controllers to enable runtime PM 2023-05-31 10:46:59 +01:00
serial_txx9.c serial: drivers: switch ch and flag to u8 2023-07-25 19:21:04 +02:00
sh-sci.c Merge 6.5-rc4 into tty-next 2023-07-31 09:39:56 +02:00
sh-sci.h tty: serial: sh-sci: Add support for tx end interrupt handling 2023-04-20 13:47:33 +02:00
sifive.c serial: sifive: Add suspend and resume operations 2023-08-22 15:29:10 +02:00
sprd_serial.c serial: sprd: Fix DMA buffer leak issue 2023-07-30 13:53:55 +02:00
st-asc.c drivers:tty: fix return value check in asc_init_port 2023-07-30 13:53:19 +02:00
stm32-usart.c serial: stm32: synchronize RX DMA channel in shutdown 2023-08-22 15:28:51 +02:00
stm32-usart.h serial: stm32: group dma pause/resume error handling into single function 2023-08-22 15:28:51 +02:00
suncore.c
…
sunhv.c tty: Explicitly include correct DT includes 2023-07-25 20:19:05 +02:00
sunplus-uart.c serial: drivers: switch ch and flag to u8 2023-07-25 19:21:04 +02:00
sunsab.c tty: Explicitly include correct DT includes 2023-07-25 20:19:05 +02:00
sunsab.h
…
sunsu.c tty: Explicitly include correct DT includes 2023-07-25 20:19:05 +02:00
sunzilog.c tty: Explicitly include correct DT includes 2023-07-25 20:19:05 +02:00
sunzilog.h
…
tegra-tcu.c tty: Explicitly include correct DT includes 2023-07-25 20:19:05 +02:00
timbuart.c serial: timbuart: Use uart_xmit_advance() 2022-11-03 03:35:43 +01:00
timbuart.h
…
uartlite.c tty: Explicitly include correct DT includes 2023-07-25 20:19:05 +02:00
ucc_uart.c serial: cpm_uart: Don't include fs_uart_pd.h when not needed 2023-08-04 15:08:55 +02:00
vt8500_serial.c serial: vt8500: Use devm_platform_get_and_ioremap_resource() 2023-07-25 20:26:06 +02:00
xilinx_uartps.c tty: serial: xilinx_uartps: Do not check for 0 return after calling platform_get_irq() 2023-08-04 15:06:01 +02:00
zs.c serial: drivers: switch ch and flag to u8 2023-07-25 19:21:04 +02:00
zs.h
…