diff options
| author | John Ogness | 2023-05-25 11:37:55 +0206 |
|---|---|---|
| committer | Greg Kroah-Hartman | 2023-07-19 16:21:53 +0200 |
| commit | 3a1ab191e00f7ff6170db4c0fd1eda251dd09ef8 (patch) | |
| tree | 20461e1a12429cf4faf8d7b9477bc1fc153a0af7 /drivers | |
| parent | 65a7cfc009b388a96fff95e3aabecfbd589649bf (diff) | |
serial: core: lock port for start_rx() in uart_resume_port()
[ Upstream commit 51e45fba14bf08b66bca764a083c7f2e2ff62f01 ]
The only user of the start_rx() callback (qcom_geni) directly calls
its own stop_rx() callback. Since stop_rx() requires that the
port->lock is taken and interrupts are disabled, the start_rx()
callback has the same requirement.
Fixes: cfab87c2c271 ("serial: core: Introduce callback for start_rx and do stop_rx in suspend only if this callback implementation is present.")
Signed-off-by: John Ogness <john.ogness@linutronix.de>
Reviewed-by: Douglas Anderson <dianders@chromium.org>
Link: https://lore.kernel.org/r/20230525093159.223817-5-john.ogness@linutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/tty/serial/serial_core.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/drivers/tty/serial/serial_core.c b/drivers/tty/serial/serial_core.c index b0a467717206..2cc5c68c8689 100644 --- a/drivers/tty/serial/serial_core.c +++ b/drivers/tty/serial/serial_core.c @@ -2431,8 +2431,11 @@ int uart_resume_port(struct uart_driver *drv, struct uart_port *uport) if (console_suspend_enabled) uart_change_pm(state, UART_PM_STATE_ON); uport->ops->set_termios(uport, &termios, NULL); - if (!console_suspend_enabled && uport->ops->start_rx) + if (!console_suspend_enabled && uport->ops->start_rx) { + spin_lock_irq(&uport->lock); uport->ops->start_rx(uport); + spin_unlock_irq(&uport->lock); + } if (console_suspend_enabled) console_start(uport->cons); } |