[PATCH 19/19] ASoC: codecs: max98090: Propagate runtime regcache_sync() errors

[Pengpeng Hou <pengpeng@iscas.ac.cn>]

max98090_runtime_suspend() puts the regmap into cache-only mode. Runtime
resume clears cache-only mode, resets the device, and replays cached
register state with regcache_sync(), but currently ignores a failed
replay.

Return the sync error and restore cache-only/dirty state before failing
runtime resume. This deliberately leaves the separate system-resume sync
call unchanged because the source does not provide an equally strong
paired system suspend/cache-only proof for that path.

Signed-off-by: Pengpeng Hou <pengpeng@iscas.ac.cn>
---
 sound/soc/codecs/max98090.c | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/sound/soc/codecs/max98090.c b/sound/soc/codecs/max98090.c
index da416329b038..53f8894db9e0 100644
--- a/sound/soc/codecs/max98090.c
+++ b/sound/soc/codecs/max98090.c
@@ -2645,12 +2645,18 @@ static void max98090_i2c_remove(struct i2c_client *client)
 static int max98090_runtime_resume(struct device *dev)
 {
 	struct max98090_priv *max98090 = dev_get_drvdata(dev);
+	int ret;
 
 	regcache_cache_only(max98090->regmap, false);
 
 	max98090_reset(max98090);
 
-	regcache_sync(max98090->regmap);
+	ret = regcache_sync(max98090->regmap);
+	if (ret < 0) {
+		regcache_cache_only(max98090->regmap, true);
+		regcache_mark_dirty(max98090->regmap);
+		return ret;
+	}
 
 	return 0;
 }
-- 
2.43.0