[PATCH] alsa: control_led - fix initialization in the mode show callback

[Jaroslav Kysela]

The str variable should be always initialized before use even if
the switch covers all cases. This is a minimalistic fix: Assign NULL,
the sprintf() may print '(null)' if something is corrupted.

Signed-off-by: Jaroslav Kysela <perex at perex.cz>
---
 sound/core/control_led.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/sound/core/control_led.c b/sound/core/control_led.c
index 861f71f2fab5..764058cc345d 100644
--- a/sound/core/control_led.c
+++ b/sound/core/control_led.c
@@ -397,7 +397,7 @@ static ssize_t mode_show(struct device *dev,
 			 struct device_attribute *attr, char *buf)
 {
 	struct snd_ctl_led *led = container_of(dev, struct snd_ctl_led, dev);
-	const char *str;
+	const char *str = NULL;
 
 	switch (led->mode) {
 	case MODE_FOLLOW_MUTE:	str = "follow-mute"; break;
-- 
2.30.2