ALSA: gus: add a check of the status of snd_ctl_add

snd_ctl_add() could fail, so let's check its status and issue an error
message if it indeed fails.

Signed-off-by: Kangjie Lu <kjlu@umn.edu>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

diff --git a/sound/isa/gus/gus_main.c b/sound/isa/gus/gus_main.c
index 3b8a0c8..33c8b66 100644 (file)
--- a/sound/isa/gus/gus_main.c
+++ b/sound/isa/gus/gus_main.c
@@ -92,8 +92,17 @@ static const struct snd_kcontrol_new snd_gus_joystick_control = {
 
 static void snd_gus_init_control(struct snd_gus_card *gus)
 {
-       if (!gus->ace_flag)
-               snd_ctl_add(gus->card, snd_ctl_new1(&snd_gus_joystick_control, gus));
+       int ret;
+
+       if (!gus->ace_flag) {
+               ret =
+                       snd_ctl_add(gus->card,
+                                       snd_ctl_new1(&snd_gus_joystick_control,
+                                               gus));
+               if (ret)
+                       snd_printk(KERN_ERR "gus: snd_ctl_add failed: %d\n",
+                                       ret);
+       }
 }
 
 /*