Input: ps2-gpio - use guard notation when acquiring mutex

Using guard notation makes the code more compact and error handling
more robust by ensuring that mutexes are released in all code paths
when control leaves critical section.

Link: https://lore.kernel.org/r/20240905041732.2034348-15-dmitry.torokhov@gmail.com
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>

diff --git a/drivers/input/serio/ps2-gpio.c b/drivers/input/serio/ps2-gpio.c
index 3a431395c4646fc47e8b1d7deb0f1532fec5d388..3e4ae2cc6552dcf63dc6c8cd58ef17fd069ce0a9 100644 (file)
--- a/drivers/input/serio/ps2-gpio.c
+++ b/drivers/input/serio/ps2-gpio.c
@@ -133,12 +133,12 @@ static int ps2_gpio_write(struct serio *serio, unsigned char val)
        int ret = 0;
 
        if (in_task()) {
-               mutex_lock(&drvdata->tx.mutex);
+               guard(mutex)(&drvdata->tx.mutex);
+
                __ps2_gpio_write(serio, val);
                if (!wait_for_completion_timeout(&drvdata->tx.complete,
                                                 msecs_to_jiffies(10000)))
                        ret = SERIO_TIMEOUT;
-               mutex_unlock(&drvdata->tx.mutex);
        } else {
                __ps2_gpio_write(serio, val);
        }