ASoC: ops: Fix stereo change notifications in snd_soc_put_volsw_sx()

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
Link: https://lore.kernel.org/r/20220201155629.120510-3-broonie@kernel.org
Signed-off-by: Mark Brown <broonie@kernel.org>

diff --git a/sound/soc/soc-ops.c b/sound/soc/soc-ops.c
index 2ce73e3..4987c58 100644 (file)
--- a/sound/soc/soc-ops.c
+++ b/sound/soc/soc-ops.c
@@ -427,6 +427,7 @@ 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;
 
        if (ucontrol->value.integer.value[0] < 0)
@@ -443,6 +444,7 @@ 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;
@@ -453,6 +455,11 @@ 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;
 }