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062e8e02dfd43c94b0d601c071e8a5c50bed830e
linux/drivers/tty/serial
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Ilpo Järvinen be03b0651f serial: 8250: Store to lsr_save_flags after lsr read 
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>
2022-06-10 13:52:19 +02:00
..
8250
serial: 8250: Store to lsr_save_flags after lsr read
2022-06-10 13:52:19 +02:00
cpm_uart
serial: cpm_uart: Fix build error without CONFIG_SERIAL_CPM_CONSOLE
2022-05-19 18:31:58 +02:00
jsm
serial: jsm: Use B0 instead of 0
2022-05-19 18:26:17 +02:00
21285.c
…
altera_jtaguart.c
…
altera_uart.c
…
amba-pl010.c
…
amba-pl011.c
serial: amba-pl011: move header content to .c
2022-05-19 18:23:09 +02:00
apbuart.c
…
apbuart.h
…
ar933x_uart.c
…
arc_uart.c
…
atmel_serial.c
…
atmel_serial.h
…
bcm63xx_uart.c
…
clps711x.c
…
digicolor-usart.c
serial: digicolor-usart: Don't allow CS5-6
2022-05-19 18:32:39 +02:00
dz.c
…
dz.h
…
earlycon-arm-semihost.c
…
earlycon-riscv-sbi.c
…
earlycon.c
…
fsl_linflexuart.c
…
fsl_lpuart.c
serial: fsl_lpuart: Remove unnecessary clearing for CRTSCTS
2022-05-19 18:26:17 +02:00
icom.c
…
imx_earlycon.c
…
imx.c
Merge tag 'tty-5.19-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty
2022-06-03 11:08:40 -07:00
ip22zilog.c
…
ip22zilog.h
…
Kconfig
Merge tag 'tty-5.19-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty
2022-06-03 11:08:40 -07:00
kgdb_nmi.c
…
kgdboc.c
…
lantiq.c
…
liteuart.c
…
lpc32xx_hs.c
…
Makefile
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max310x.c
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max3100.c
…
mcf.c
…
men_z135_uart.c
…
meson_uart.c
serial: meson: acquire port->lock in startup()
2022-05-19 18:29:25 +02:00
milbeaut_usio.c
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mpc52xx_uart.c
…
mps2-uart.c
…
msm_serial.c
serial: msm_serial: disable interrupts in __msm_console_write()
2022-05-19 18:29:44 +02:00
mux.c
…
mvebu-uart.c
…
mxs-auart.c
…
omap-serial.c
…
owl-uart.c
…
pch_uart.c
serial: pch: inline pop_tx() into handle_tx()
2022-05-05 22:42:47 +02:00
pic32_uart.c
serial: pic32: restore disabled irqs in pic32_uart_startup()
2022-05-05 22:39:20 +02:00
pmac_zilog.c
serial: pmac_zilog: remove initial print
2022-05-19 18:23:19 +02:00
pmac_zilog.h
serial: pmac_zilog: remove unused uart_pmac_port::termios_cache
2022-05-19 18:23:19 +02:00
pxa.c
…
qcom_geni_serial.c
tty: serial: qcom-geni-serial: Implement start_rx callback
2022-06-10 13:30:41 +02:00
rda-uart.c
serial: rda-uart: Don't allow CS5-6
2022-05-19 18:32:39 +02:00
rp2.c
…
sa1100.c
…
samsung_tty.c
tty: serial: samsung_tty: Fix suspend/resume on S5L
2022-05-19 18:24:47 +02:00
sb1250-duart.c
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sc16is7xx.c
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sccnxp.c
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serial_core.c
serial: core: Introduce callback for start_rx and do stop_rx in suspend only if this callback implementation is present.
2022-06-10 13:30:41 +02:00
serial_mctrl_gpio.c
…
serial_mctrl_gpio.h
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serial_txx9.c
serial: txx9: Don't allow CS5-6
2022-05-19 18:32:40 +02:00
serial-tegra.c
…
sh-sci.c
serial: sh-sci: Don't allow CS5-6
2022-05-19 18:32:40 +02:00
sh-sci.h
…
sifive.c
serial: sifive: Sanitize CSIZE and c_iflag
2022-05-19 18:32:40 +02:00
sprd_serial.c
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st-asc.c
serial: st-asc: Sanitize CSIZE and correct PARENB for CS7
2022-05-19 18:32:40 +02:00
stm32-usart.c
serial: stm32-usart: Correct CSIZE, bits, and parity
2022-05-19 18:32:40 +02:00
stm32-usart.h
serial: stm32: Use TC interrupt to deassert GPIO RTS in RS485 mode
2022-05-05 22:37:47 +02:00
suncore.c
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sunhv.c
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sunplus-uart.c
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sunsab.c
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sunsab.h
…
sunsu.c
tty: remove CMSPAR ifdefs
2022-05-19 18:26:16 +02:00
sunzilog.c
…
sunzilog.h
…
tegra-tcu.c
…
timbuart.c
…
timbuart.h
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uartlite.c
serial: uartlite: Fix BRKINT clearing
2022-05-19 18:32:39 +02:00
ucc_uart.c
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vr41xx_siu.c
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vt8500_serial.c
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xilinx_uartps.c
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zs.c
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zs.h
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