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Pavel Krasavin 065ae2ec2b tty: serial: meson: fix hard LOCKUP on crtscts mode 
commit 2a1d728f20edeee7f26dc307ed9df4e0d23947ab upstream.

There might be hard lockup if we set crtscts mode on port without RTS/CTS configured:

# stty -F /dev/ttyAML6 crtscts; echo 1 > /dev/ttyAML6; echo 2 > /dev/ttyAML6
[   95.890386] rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
[   95.890857] rcu:     3-...0: (201 ticks this GP) idle=e33c/1/0x4000000000000000 softirq=5844/5846 fqs=4984
[   95.900212] rcu:     (detected by 2, t=21016 jiffies, g=7753, q=296 ncpus=4)
[   95.906972] Task dump for CPU 3:
[   95.910178] task:bash            state:R  running task     stack:0     pid:205   ppid:1      flags:0x00000202
[   95.920059] Call trace:
[   95.922485]  __switch_to+0xe4/0x168
[   95.925951]  0xffffff8003477508
[   95.974379] watchdog: Watchdog detected hard LOCKUP on cpu 3
[   95.974424] Modules linked in: 88x2cs(O) rtc_meson_vrtc

Possible solution would be to not allow to setup crtscts on such port.

Tested on S905X3 based board.

Fixes: ff7693d079e5 ("ARM: meson: serial: add MesonX SoC on-chip uart driver")
Cc: stable@vger.kernel.org
Signed-off-by: Pavel Krasavin <pkrasavin@imaqliq.com>
Reviewed-by: Neil Armstrong <neil.armstrong@linaro.org>
Reviewed-by: Dmitry Rokosov <ddrokosov@salutedevices.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2023-11-28 17:19:57 +00:00
..
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
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 b320441c04c9 ("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_earlycon.c
serial: make uart_console_write->putchar()'s character an unsigned char
2022-03-03 15:06:31 +01:00
imx.c
serial: imx: Use devm_platform_get_and_ioremap_resource()
2023-07-25 20:26:07 +02:00
ip22zilog.c
serial: drivers: switch ch and flag to u8
2023-07-25 19:21:04 +02:00
ip22zilog.h
…
Kconfig
TTY/Serial driver updates for 6.5-rc1.
2023-07-03 13:14:58 -07:00
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
Makefile
serial: cpm_uart: Remove cpm_uart/ subdirectory
2023-08-04 15:08:30 +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
tty: serial: meson: fix hard LOCKUP on crtscts mode
2023-11-28 17:19:57 +00:00
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_base_bus.c
serial: core: Fix serial core port id, including multiport devices
2023-08-11 21:19:22 +02:00
serial_base.h
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_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
serial-tegra.c
serial: tegra: handle clk prepare error in tegra_uart_hw_init()
2023-08-22 15:29:18 +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
…