ALSA: line6: Handle error from line6_pcm_acquire()

Tested-by: Chris Rorvick <chris@rorvick.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

diff --git a/sound/usb/line6/pcm.c b/sound/usb/line6/pcm.c
index 73c8746..8461d6b 100644 (file)
--- a/sound/usb/line6/pcm.c
+++ b/sound/usb/line6/pcm.c
@@ -45,15 +45,22 @@ static int snd_line6_impulse_volume_put(struct snd_kcontrol *kcontrol,
 {
        struct snd_line6_pcm *line6pcm = snd_kcontrol_chip(kcontrol);
        int value = ucontrol->value.integer.value[0];
+       int err;
 
        if (line6pcm->impulse_volume == value)
                return 0;
 
        line6pcm->impulse_volume = value;
-       if (value > 0)
-               line6_pcm_acquire(line6pcm, LINE6_STREAM_IMPULSE);
-       else
+       if (value > 0) {
+               err = line6_pcm_acquire(line6pcm, LINE6_STREAM_IMPULSE);
+               if (err < 0) {
+                       line6pcm->impulse_volume = 0;
+                       line6_pcm_release(line6pcm, LINE6_STREAM_IMPULSE);
+                       return err;
+               }
+       } else {
                line6_pcm_release(line6pcm, LINE6_STREAM_IMPULSE);
+       }
        return 1;
 }
 

diff --cc sound/usb/line6/toneport.c
Simple merge