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ALSA: hda - fix the 'Capture Switch' value change notifications 

The original code in the cap_put_caller() function does not
handle correctly the positive values returned from the passed
function for multiple iterations. It means that the change
notifications may be lost.

Fixes: 352f7f914e ("ALSA: hda - Merge Realtek parser code to generic parser")
BugLink: https://bugzilla.kernel.org/show_bug.cgi?id=213851
Cc: <stable@kernel.org>
Signed-off-by: Jaroslav Kysela <perex@perex.cz>
Link: https://lore.kernel.org/r/20210811161441.1325250-1-perex@perex.cz
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Jaroslav Kysela 2021-08-11 18:14:41 +02:00 committed by Takashi Iwai
parent d07149aba2
commit a2befe9380
1 changed files with 7 additions and 3 deletions
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10
sound/pci/hda/hda_generic.c
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@ -3460,7 +3460,7 @@ static int cap_put_caller(struct snd_kcontrol *kcontrol,
struct hda_gen_spec *spec = codec->spec;
const struct hda_input_mux *imux;
struct nid_path *path;
int i, adc_idx, err = 0;
int i, adc_idx, ret, err = 0;
imux = &spec->input_mux;
adc_idx = kcontrol->id.index;
@ -3470,9 +3470,13 @@ static int cap_put_caller(struct snd_kcontrol *kcontrol,
if (!path || !path->ctls[type])
continue;
kcontrol->private_value = path->ctls[type];
err = func(kcontrol, ucontrol);
if (err < 0)
ret = func(kcontrol, ucontrol);
if (ret < 0) {
err = ret;
break;
}
if (ret > 0)
err = 1;
}
mutex_unlock(&codec->control_mutex);
if (err >= 0 && spec->cap_sync_hook)