linux/drivers/tty
Ilpo Järvinen 4b171ac88c serial: 8250_dw: Store LSR into lsr_saved_flags in dw8250_tx_wait_empty()
[ Upstream commit af14f3007e ]

Make sure LSR flags are preserved in dw8250_tx_wait_empty(). This
function is called from a low-level out function and therefore cannot
call serial_lsr_in() as it would lead to infinite recursion.

It is borderline if the flags need to be saved here at all since this
code relates to writing LCR register which usually implies no important
characters should be arriving.

Fixes: 914eaf935e ("serial: 8250_dw: Allow TX FIFO to drain before writing to UART_LCR")
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Link: https://lore.kernel.org/r/20220608095431.18376-7-ilpo.jarvinen@linux.intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2022-08-21 15:16:05 +02:00
..
hvc tty: hvc: fix return value of __setup handler 2022-04-08 14:40:28 +02:00
ipwireless
serdev
serial serial: 8250_dw: Store LSR into lsr_saved_flags in dw8250_tx_wait_empty() 2022-08-21 15:16:05 +02:00
vt tty: vt: initialize unicode screen buffer 2022-08-21 15:15:22 +02:00
amiserial.c
cyclades.c tty: drivers/tty/, stop using tty_schedule_flip() 2022-07-29 17:19:27 +02:00
ehv_bytechan.c
goldfish.c tty: drivers/tty/, stop using tty_schedule_flip() 2022-07-29 17:19:27 +02:00
isicom.c
Kconfig
Makefile
mips_ejtag_fdc.c
moxa.c tty: drivers/tty/, stop using tty_schedule_flip() 2022-07-29 17:19:27 +02:00
moxa.h
mxser.c mxser: fix xmit_buf leak in activate when LSR == 0xff 2022-04-08 14:40:23 +02:00
mxser.h
n_gsm.c tty: n_gsm: fix mux activation issues in gsm_config() 2022-05-18 10:23:46 +02:00
n_hdlc.c tty: n_hdlc: make n_hdlc_tty_wakeup() asynchronous 2021-12-22 09:30:56 +01:00
n_null.c
n_r3964.c
n_tracerouter.c
n_tracesink.c
n_tracesink.h
n_tty.c tty: n_tty: Restore EOF push handling behavior 2022-06-14 18:32:30 +02:00
nozomi.c
pty.c tty: use new tty_insert_flip_string_and_push_buffer() in pty_write() 2022-07-29 17:19:28 +02:00
rocket_int.h
rocket.c
rocket.h
synclink_gt.c tty: synclink_gt: Fix null-pointer-dereference in slgt_clean() 2022-06-14 18:32:41 +02:00
synclink.c
synclinkmp.c
sysrq.c sysrq: do not omit current cpu when showing backtrace of all active CPUs 2022-06-14 18:32:42 +02:00
tty_audit.c
tty_baudrate.c
tty_buffer.c tty: use new tty_insert_flip_string_and_push_buffer() in pty_write() 2022-07-29 17:19:28 +02:00
tty_io.c tty: Fix data race between tiocsti() and flush_to_ldisc() 2021-09-15 09:50:47 +02:00
tty_ioctl.c
tty_jobctrl.c
tty_ldisc.c
tty_ldsem.c
tty_mutex.c
tty_port.c
ttynull.c
vcc.c