linux-kernel - [PATCH 4.9 11/19] ASoC: max98090: Generate notifications on changes for custom control

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Date:   Mon, 16 May 2022 21:36:24 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Mark Brown <broonie@...nel.org>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH 4.9 11/19] ASoC: max98090: Generate notifications on changes for custom control

From: Mark Brown <broonie@...nel.org>

[ Upstream commit 13fcf676d9e102594effc686d98521ff5c90b925 ]

The max98090 driver has some custom controls which share a put() function
which returns 0 unconditionally, meaning that events are not generated
when the value changes. Fix that.

Signed-off-by: Mark Brown <broonie@...nel.org>
Link: https://lore.kernel.org/r/20220420193454.2647908-2-broonie@kernel.org
Signed-off-by: Mark Brown <broonie@...nel.org>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 sound/soc/codecs/max98090.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/sound/soc/codecs/max98090.c b/sound/soc/codecs/max98090.c
index 4aefb13900c2..1a55f6aecdfe 100644
--- a/sound/soc/codecs/max98090.c
+++ b/sound/soc/codecs/max98090.c
@@ -436,7 +436,7 @@ static int max98090_put_enab_tlv(struct snd_kcontrol *kcontrol,
 		mask << mc->shift,
 		sel << mc->shift);
 
-	return 0;
+	return *select != val;
 }
 
 static const char *max98090_perf_pwr_text[] =
-- 
2.35.1