linux/drivers/tty
Uwe Kleine-König ea2624b5b8 serial: stm32: Reset .throttled state in .startup()
When an UART is opened that still has .throttled set from a previous
open, the RX interrupt is enabled but the irq handler doesn't consider
it. This easily results in a stuck irq with the effect to occupy the CPU
in a tight loop.

So reset the throttle state in .startup() to ensure that RX irqs are
handled.

Fixes: d1ec8a2eab ("serial: stm32: update throttle and unthrottle ops for dma mode")
Cc: stable@vger.kernel.org
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Link: https://lore.kernel.org/r/a784f80d3414f7db723b2ec66efc56e1ad666cbf.1713344161.git.u.kleine-koenig@pengutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2024-04-17 13:26:45 +02:00
..
hvc
ipwireless
serdev
serial serial: stm32: Reset .throttled state in .startup() 2024-04-17 13:26:45 +02:00
vt TTY/Serial driver update for 6.9-rc1 2024-03-21 12:44:10 -07:00
amiserial.c
ehv_bytechan.c
goldfish.c
Kconfig
Makefile
mips_ejtag_fdc.c
moxa.c
mxser.c
n_gsm.c
n_hdlc.c
n_null.c
n_tty.c
nozomi.c
pty.c
rpmsg_tty.c
synclink_gt.c
sysrq.c
tty.h
tty_audit.c
tty_baudrate.c
tty_buffer.c
tty_io.c
tty_ioctl.c
tty_jobctrl.c
tty_ldisc.c
tty_ldsem.c
tty_mutex.c
tty_port.c
ttynull.c
vcc.c