When writing out a stereo control we discard the change notification from the first channel, meaning that events are only generated based on changes to the second channel. Ensure that we report a change if either channel has changed.
Signed-off-by: Mark Brown broonie@kernel.org Cc: stable@vger.kernel.org --- sound/soc/soc-ops.c | 7 +++++++ 1 file changed, 7 insertions(+)
diff --git a/sound/soc/soc-ops.c b/sound/soc/soc-ops.c index 73c9d53de25b..f0d1aeb38346 100644 --- a/sound/soc/soc-ops.c +++ b/sound/soc/soc-ops.c @@ -413,6 +413,7 @@ int snd_soc_put_volsw_sx(struct snd_kcontrol *kcontrol, int min = mc->min; unsigned int mask = (1U << (fls(min + max) - 1)) - 1; int err = 0; + int ret; unsigned int val, val_mask;
val_mask = mask << shift; @@ -422,6 +423,7 @@ int snd_soc_put_volsw_sx(struct snd_kcontrol *kcontrol, err = snd_soc_component_update_bits(component, reg, val_mask, val); if (err < 0) return err; + ret = err;
if (snd_soc_volsw_is_stereo(mc)) { unsigned int val2; @@ -432,6 +434,11 @@ int snd_soc_put_volsw_sx(struct snd_kcontrol *kcontrol,
err = snd_soc_component_update_bits(component, reg2, val_mask, val2); + + /* Don't discard any error code or drop change flag */ + if (ret == 0 || err < 0) { + ret = err; + } } return err; }