[PATCH v2 1/2] leds: trigger: Fix error path to not unlock the unlocked mutex

[Uwe Kleine-König <u.kleine-koenig@xxxxxxxxxxxxxx>]

ttyname is allocated before the mutex is taken, so it must not be
unlocked in the error path.

Reported-by: Pavel Machek <pavel@xxxxxx>
Fixes: fd4a641ac88f ("leds: trigger: implement a tty trigger")
Acked-by: Pavel Machek <pavel@xxxxxx>
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@xxxxxxxxxxxxxx>
---
 drivers/leds/trigger/ledtrig-tty.c | 7 ++-----
 1 file changed, 2 insertions(+), 5 deletions(-)

diff --git a/drivers/leds/trigger/ledtrig-tty.c b/drivers/leds/trigger/ledtrig-tty.c
index d2ab6ab080ac..af61281dc6a1 100644
--- a/drivers/leds/trigger/ledtrig-tty.c
+++ b/drivers/leds/trigger/ledtrig-tty.c
@@ -51,10 +51,8 @@ static ssize_t ttyname_store(struct device *dev,
 
 	if (size) {
 		ttyname = kmemdup_nul(buf, size, GFP_KERNEL);
-		if (!ttyname) {
-			ret = -ENOMEM;
-			goto out_unlock;
-		}
+		if (!ttyname)
+			return -ENOMEM;
 	} else {
 		ttyname = NULL;
 	}
@@ -69,7 +67,6 @@ static ssize_t ttyname_store(struct device *dev,
 
 	trigger_data->ttyname = ttyname;
 
-out_unlock:
 	mutex_unlock(&trigger_data->mutex);
 
 	if (ttyname && !running)
-- 
2.29.2