From: Jaroslav Kysela <perex@xxxxxxxx>
[ Upstream commit a2befe9380dd04ee76c871568deca00eedf89134 ]
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: 352f7f914ebb ("ALSA: hda - Merge Realtek parser code to generic parser")
BugLink: https://bugzilla.kernel.org/show_bug.cgi?id=213851
Cc: <stable@xxxxxxxxxx>
Signed-off-by: Jaroslav Kysela <perex@xxxxxxxx>
Link: https://lore.kernel.org/r/20210811161441.1325250-1-perex@xxxxxxxx
Signed-off-by: Takashi Iwai <tiwai@xxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
sound/pci/hda/hda_generic.c | 10 +++++++---
1 file changed, 7 insertions(+), 3 deletions(-)
diff --git a/sound/pci/hda/hda_generic.c b/sound/pci/hda/hda_generic.c
index 7c49a7e92dd2..323df011b94a 100644
--- a/sound/pci/hda/hda_generic.c
+++ b/sound/pci/hda/hda_generic.c
@@ -3458,7 +3458,7 @@ 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;
@@ -3468,9 +3468,13 @@ 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)
--
2.30.2
