From d0a396083e91e3f118c90afa95c91f8c243a6c11 Mon Sep 17 00:00:00 2001 From: Steven Price Date: Thu, 1 Jun 2023 11:55:48 +0100 Subject: serial: core: Don't drop port_mutex in serial_core_remove_one_port Commit 84a9582fd203 ("serial: core: Start managing serial controllers to enable runtime PM") required the caller to hold port_mutex rather than taking it locally. However the mutex_unlock() call wasn't removed causing the mutex to be dropped unexpectly. Remove the call to mutex_unlock() (and fix up the early return) to restore correct behaviour. Fixes: 84a9582fd203 ("serial: core: Start managing serial controllers to enable runtime PM") Signed-off-by: Steven Price Reviewed-by: Tony Lindgren Link: https://lore.kernel.org/r/20230601105548.29965-1-steven.price@arm.com Signed-off-by: Greg Kroah-Hartman --- drivers/tty/serial/serial_core.c | 4 +--- 1 file changed, 1 insertion(+), 3 deletions(-) (limited to 'drivers/tty') diff --git a/drivers/tty/serial/serial_core.c b/drivers/tty/serial/serial_core.c index 29bd5ede0b25..efda90215ee9 100644 --- a/drivers/tty/serial/serial_core.c +++ b/drivers/tty/serial/serial_core.c @@ -3194,7 +3194,7 @@ static void serial_core_remove_one_port(struct uart_driver *drv, if (!uart_port) { mutex_unlock(&port->mutex); - goto out; + return; } mutex_unlock(&port->mutex); @@ -3234,8 +3234,6 @@ static void serial_core_remove_one_port(struct uart_driver *drv, wait_event(state->remove_wait, !atomic_read(&state->refcount)); state->uart_port = NULL; mutex_unlock(&port->mutex); -out: - mutex_unlock(&port_mutex); } /** -- cgit v1.2.3