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linux-stable/drivers/tty/serial
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Ilpo Järvinen 4d70e2f375 serial: 8250: Store to lsr_save_flags after lsr read 
commit be03b0651f upstream.

Not all LSR register flags are preserved across reads. Therefore, LSR
readers must store the non-preserved bits into lsr_save_flags.

This fix was initially mixed into feature commit f6f586102a ("serial:
8250: Handle UART without interrupt on TEMT using em485"). However,
that feature change had a flaw and it was reverted to make room for
simpler approach providing the same feature. The embedded fix got
reverted with the feature change.

Re-add the lsr_save_flags fix and properly mark it's a fix.

Link: https://lore.kernel.org/all/1d6c31d-d194-9e6a-ddf9-5f29af829f3@linux.intel.com/T/#m1737eef986bd20cf19593e344cebd7b0244945fc
Fixes: e490c9144c ("tty: Add software emulated RS485 support for 8250")
Cc: stable <stable@kernel.org>
Acked-by: Uwe Kleine-König <u.kleine-koenig@penugtronix.de>
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Link: https://lore.kernel.org/r/f4d774be-1437-a550-8334-19d8722ab98c@linux.intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2022-06-22 14:28:08 +02:00
..
8250 serial: 8250: Store to lsr_save_flags after lsr read 2022-06-22 14:28:08 +02:00
cpm_uart serial: cpm_uart: Fix build error without CONFIG_SERIAL_CPM_CONSOLE 2022-06-14 18:44:51 +02:00
jsm tty: serial: jsm: fix two assignments in if conditions 2022-03-18 13:15:50 +01:00
21285.c serial: make uart_console_write->putchar()'s character an unsigned char 2022-03-03 15:06:31 +01:00
altera_jtaguart.c serial: make uart_console_write->putchar()'s character an unsigned char 2022-03-03 15:06:31 +01:00
altera_uart.c serial: make uart_console_write->putchar()'s character an unsigned char 2022-03-03 15:06:31 +01:00
amba-pl010.c serial: make uart_console_write->putchar()'s character an unsigned char 2022-03-03 15:06:31 +01:00
amba-pl011.c serial: amba-pl011: do not time out prematurely when draining tx fifo 2022-04-15 11:41:56 +02:00
amba-pl011.h
apbuart.c serial: make uart_console_write->putchar()'s character an unsigned char 2022-03-03 15:06:31 +01:00
apbuart.h
ar933x_uart.c serial: make uart_console_write->putchar()'s character an unsigned char 2022-03-03 15:06:31 +01:00
arc_uart.c serial: make uart_console_write->putchar()'s character an unsigned char 2022-03-03 15:06:31 +01:00
atmel_serial.c serial: make uart_console_write->putchar()'s character an unsigned char 2022-03-03 15:06:31 +01:00
atmel_serial.h
bcm63xx_uart.c serial: make uart_console_write->putchar()'s character an unsigned char 2022-03-03 15:06:31 +01:00
clps711x.c serial: make uart_console_write->putchar()'s character an unsigned char 2022-03-03 15:06:31 +01:00
digicolor-usart.c serial: digicolor-usart: Don't allow CS5-6 2022-06-14 18:44:51 +02:00
dz.c serial: make uart_console_write->putchar()'s character an unsigned char 2022-03-03 15:06:31 +01:00
dz.h
earlycon-arm-semihost.c serial: make uart_console_write->putchar()'s character an unsigned char 2022-03-03 15:06:31 +01:00
earlycon-riscv-sbi.c serial: make uart_console_write->putchar()'s character an unsigned char 2022-03-03 15:06:31 +01:00
earlycon.c earlycon: simplify earlycon-table implementation 2020-12-04 15:49:48 +01:00
fsl_linflexuart.c serial: make uart_console_write->putchar()'s character an unsigned char 2022-03-03 15:06:31 +01:00
fsl_lpuart.c tty: serial: fsl_lpuart: fix potential bug when using both of_alias_get_id and ida_simple_get 2022-06-14 18:44:45 +02:00
icom.c tty: Fix a possible resource leak in icom_probe 2022-06-14 18:45:09 +02:00
icom.h
imx.c serial: imx: fix overrun interrupts in DMA mode 2022-04-15 11:41:58 +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: make uart_console_write->putchar()'s character an unsigned char 2022-03-03 15:06:31 +01:00
ip22zilog.h
Kconfig tty: serial: samsung: Add ARTPEC-8 support 2022-03-18 13:29:05 +01:00
kgdb_nmi.c tty: drop put_tty_driver 2021-07-27 12:17:21 +02:00
kgdboc.c kgdboc: fix return value of __setup handler 2022-03-18 13:12:33 +01:00
lantiq.c serial: make uart_console_write->putchar()'s character an unsigned char 2022-03-03 15:06:31 +01:00
liteuart.c serial: make uart_console_write->putchar()'s character an unsigned char 2022-03-03 15:06:31 +01:00
lpc32xx_hs.c serial: make uart_console_write->putchar()'s character an unsigned char 2022-03-03 15:06:31 +01:00
Makefile serial: sunplus-uart: Add Sunplus SoC UART Driver 2022-02-26 10:03:21 +01:00
max310x.c spi: make remove callback a void function 2022-02-09 13:00:45 +00:00
max3100.c TTY/Serial driver changes for 5.18-rc1 2022-03-28 13:00:51 -07:00
mcf.c serial: mcf: use helpers in mcf_tx_chars() 2022-01-26 14:55:14 +01:00
men_z135_uart.c
meson_uart.c serial: meson: acquire port->lock in startup() 2022-06-14 18:44:51 +02:00
milbeaut_usio.c serial: make uart_console_write->putchar()'s character an unsigned char 2022-03-03 15:06:31 +01:00
mpc52xx_uart.c tty: serial: mpc52xx_uart: make rx/tx hooks return unsigned, part II. 2022-04-04 10:33:02 +02:00
mps2-uart.c serial: make uart_console_write->putchar()'s character an unsigned char 2022-03-03 15:06:31 +01:00
msm_serial.c serial: msm_serial: disable interrupts in __msm_console_write() 2022-06-14 18:45:11 +02:00
mux.c parisc: Make struct parisc_driver::remove() return void 2021-08-30 10:18:25 +02:00
mvebu-uart.c serial: make uart_console_write->putchar()'s character an unsigned char 2022-03-03 15:06:31 +01:00
mxs-auart.c serial: make uart_console_write->putchar()'s character an unsigned char 2022-03-03 15:06:31 +01:00
omap-serial.c serial: make uart_console_write->putchar()'s character an unsigned char 2022-03-03 15:06:31 +01:00
owl-uart.c tty: serial: owl: Fix missing clk_disable_unprepare() in owl_uart_probe 2022-06-14 18:44:45 +02:00
pch_uart.c serial: pch: don't overwrite xmit->buf[0] by x_char 2022-06-09 10:30:53 +02:00
pic32_uart.c serial: make uart_console_write->putchar()'s character an unsigned char 2022-03-03 15:06:31 +01:00
pic32_uart.h
pmac_zilog.c serial: make uart_console_write->putchar()'s character an unsigned char 2022-03-03 15:06:31 +01:00
pmac_zilog.h
pxa.c serial: make uart_console_write->putchar()'s character an unsigned char 2022-03-03 15:06:31 +01:00
qcom_geni_serial.c serial: make uart_console_write->putchar()'s character an unsigned char 2022-03-03 15:06:31 +01:00
rda-uart.c serial: rda-uart: Don't allow CS5-6 2022-06-14 18:44:51 +02:00
rp2.c serial: rp2: use 'request_firmware' instead of 'request_firmware_nowait' 2021-05-21 20:34:02 +02:00
sa1100.c drivers: tty: serial: Fix deadlock in sa1100_set_termios() 2022-06-14 18:45:10 +02:00
samsung_tty.c tty: serial: samsung: Add ARTPEC-8 support 2022-03-18 13:29:05 +01:00
sb1250-duart.c serial: make uart_console_write->putchar()'s character an unsigned char 2022-03-03 15:06:31 +01:00
sc16is7xx.c Revert "serial: sc16is7xx: Clear RS485 bits in the shutdown" 2022-04-22 16:37:00 +02:00
sccnxp.c serial: make uart_console_write->putchar()'s character an unsigned char 2022-03-03 15:06:31 +01:00
serial-tegra.c tty: serial: make use of UART_LCR_WLEN() + tty_get_char_size() 2022-02-28 21:49:06 +01:00
serial_core.c serial: 8250: fix XOFF/XON sending when DMA is used 2022-03-18 13:30:54 +01:00
serial_mctrl_gpio.c serial: mctrl_gpio: add a new API to enable / disable wake_irq 2022-02-08 11:07:16 +01:00
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_txx9.c serial: txx9: Don't allow CS5-6 2022-06-14 18:44:51 +02:00
sh-sci.c serial: sh-sci: Don't allow CS5-6 2022-06-14 18:44:52 +02:00
sh-sci.h serial: sh-sci: Add support for RZ/G2L SoC 2021-06-04 15:12:40 +02:00
sifive.c serial: sifive: Sanitize CSIZE and c_iflag 2022-06-14 18:44:52 +02:00
sprd_serial.c serial: make uart_console_write->putchar()'s character an unsigned char 2022-03-03 15:06:31 +01:00
st-asc.c serial: st-asc: Sanitize CSIZE and correct PARENB for CS7 2022-06-14 18:44:52 +02:00
stm32-usart.c serial: stm32-usart: Correct CSIZE, bits, and parity 2022-06-14 18:44:52 +02:00
stm32-usart.h serial: stm32: rework TX DMA state condition 2022-01-06 15:58:46 +01:00
suncore.c
sunhv.c
sunplus-uart.c serial: make uart_console_write->putchar()'s character an unsigned char 2022-03-03 15:06:31 +01:00
sunsab.c serial: make uart_console_write->putchar()'s character an unsigned char 2022-03-03 15:06:31 +01:00
sunsab.h
sunsu.c serial: make uart_console_write->putchar()'s character an unsigned char 2022-03-03 15:06:31 +01:00
sunzilog.c serial: make uart_console_write->putchar()'s character an unsigned char 2022-03-03 15:06:31 +01:00
sunzilog.h
tegra-tcu.c serial: tegra-tcu: Reorder channel initialization 2021-06-15 14:02:06 +02:00
timbuart.c serial: timbuart: drop low-latency workaround 2021-04-22 12:09:26 +02:00
timbuart.h
uartlite.c serial: uartlite: Fix BRKINT clearing 2022-06-14 18:44:51 +02:00
ucc_uart.c firmware: replace HOTPLUG with UEVENT in FW_ACTION defines 2021-05-13 16:14:45 +02:00
vr41xx_siu.c serial: make uart_console_write->putchar()'s character an unsigned char 2022-03-03 15:06:31 +01:00
vt8500_serial.c serial: make uart_console_write->putchar()'s character an unsigned char 2022-03-03 15:06:31 +01:00
xilinx_uartps.c serial: make uart_console_write->putchar()'s character an unsigned char 2022-03-03 15:06:31 +01:00
zs.c serial: make uart_console_write->putchar()'s character an unsigned char 2022-03-03 15:06:31 +01:00
zs.h