From: Takashi Iwai tiwai@suse.de
commit 5af82c81b2c49cfb1cad84d9eb6eab0e3d1c4842 upstream.
The put callback of a kcontrol is supposed to return 1 when the value is changed, and this will be notified to user-space. However, some DAPM kcontrols always return 0 (except for errors), hence the user-space misses the update of a control value.
This patch corrects the behavior by properly returning 1 when the value gets updated.
Reported-and-tested-by: Hans de Goede hdegoede@redhat.com Cc: stable@vger.kernel.org Signed-off-by: Takashi Iwai tiwai@suse.de Link: https://lore.kernel.org/r/20211006141712.2439-1-tiwai@suse.de Signed-off-by: Mark Brown broonie@kernel.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- sound/soc/soc-dapm.c | 13 ++++++++----- 1 file changed, 8 insertions(+), 5 deletions(-)
--- a/sound/soc/soc-dapm.c +++ b/sound/soc/soc-dapm.c @@ -2515,6 +2515,7 @@ static int snd_soc_dapm_set_pin(struct s const char *pin, int status) { struct snd_soc_dapm_widget *w = dapm_find_widget(dapm, pin, true); + int ret = 0;
dapm_assert_locked(dapm);
@@ -2527,13 +2528,14 @@ static int snd_soc_dapm_set_pin(struct s dapm_mark_dirty(w, "pin configuration"); dapm_widget_invalidate_input_paths(w); dapm_widget_invalidate_output_paths(w); + ret = 1; }
w->connected = status; if (status == 0) w->force = 0;
- return 0; + return ret; }
/** @@ -3461,14 +3463,15 @@ int snd_soc_dapm_put_pin_switch(struct s { struct snd_soc_card *card = snd_kcontrol_chip(kcontrol); const char *pin = (const char *)kcontrol->private_value; + int ret;
if (ucontrol->value.integer.value[0]) - snd_soc_dapm_enable_pin(&card->dapm, pin); + ret = snd_soc_dapm_enable_pin(&card->dapm, pin); else - snd_soc_dapm_disable_pin(&card->dapm, pin); + ret = snd_soc_dapm_disable_pin(&card->dapm, pin);
snd_soc_dapm_sync(&card->dapm); - return 0; + return ret; } EXPORT_SYMBOL_GPL(snd_soc_dapm_put_pin_switch);
@@ -3858,7 +3861,7 @@ static int snd_soc_dapm_dai_link_put(str
w->params_select = ucontrol->value.enumerated.item[0];
- return 0; + return 1; }
static void