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ALSA: hda - Avoid possible race of beep on/off

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Call cancel_work_sync() when turning off the beep switch so that the
mute call is executed in a proper order.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Takashi Iwai 2012-07-03 17:36:35 +02:00
parent 257dfb4100
commit 3fd877d32c
1 changed files with 3 additions and 2 deletions
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5
sound/pci/hda/hda_beep.c
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@ -165,12 +165,13 @@ static int snd_hda_do_attach(struct hda_beep *beep)
int snd_hda_enable_beep_device(struct hda_codec *codec, int enable)
{
struct hda_beep *beep = codec->beep;
enable = !!enable;
if (beep == NULL)
if (!beep)
return 0;
enable = !!enable;
if (beep->enabled != enable) {
beep->enabled = enable;
if (!enable) {
cancel_work_sync(&beep->beep_work);
/* turn off beep */
snd_hda_codec_write(beep->codec, beep->nid, 0,
AC_VERB_SET_BEEP_CONTROL, 0);