[PATCH] iio: light: vcnl4035: Propagate regcache_sync() errors

[Pengpeng Hou]

vcnl4035_runtime_suspend() marks the regmap cache dirty before runtime
suspend. vcnl4035_runtime_resume() then syncs the cache before re-
enabling ALS, but currently ignores a regcache_sync() failure and can
still report resume success.

Return the regcache_sync() error so the PM core sees the failed register
restore.

Signed-off-by: Pengpeng Hou <pengpeng@xxxxxxxxxxx>
---
 drivers/iio/light/vcnl4035.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/iio/light/vcnl4035.c b/drivers/iio/light/vcnl4035.c
index bf3a49b4351d..3ca7ccdb7f15 100644
--- a/drivers/iio/light/vcnl4035.c
+++ b/drivers/iio/light/vcnl4035.c
@@ -647,7 +647,9 @@ static int vcnl4035_runtime_resume(struct device *dev)
 	struct vcnl4035_data *data = iio_priv(indio_dev);
 	int ret;
 
-	regcache_sync(data->regmap);
+	ret = regcache_sync(data->regmap);
+	if (ret < 0)
+		return ret;
 	ret = vcnl4035_set_als_power_state(data, VCNL4035_MODE_ALS_ENABLE);
 	if (ret < 0)
 		return ret;
-- 
2.43.0