[PATCH 3/4] ASoC: tegra: Fix kcontrol put callback in DMIC

[Sameer Pujar <spujar@nvidia.com>]

The kcontrol put callback is expected to return 1 when there is change
in HW or when the update is acknowledged by driver. This would ensure
that change notifications are sent to subscribed applications. Update
the DMIC driver accordingly.

Fixes: 8c8ff982e9e2 ("ASoC: tegra: Add Tegra210 based DMIC driver")
Suggested-by: Jaroslav Kysela <perex@perex.cz>
Suggested-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Sameer Pujar <spujar@nvidia.com>
---
 sound/soc/tegra/tegra210_dmic.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/sound/soc/tegra/tegra210_dmic.c b/sound/soc/tegra/tegra210_dmic.c
index b096478..133509f 100644
--- a/sound/soc/tegra/tegra210_dmic.c
+++ b/sound/soc/tegra/tegra210_dmic.c
@@ -197,8 +197,10 @@ static int tegra210_dmic_put_control(struct snd_kcontrol *kcontrol,
 		dmic->osr_val = value;
 	else if (strstr(kcontrol->id.name, "LR Polarity Select"))
 		dmic->lrsel = value;
+	else
+		return 0;
 
-	return 0;
+	return 1;
 }
 
 static const struct snd_soc_dai_ops tegra210_dmic_dai_ops = {
-- 
2.7.4