Check and propagate the return value of adp8870_write() when it fails,
which is possible when SMBus writing byte fails.
Signed-off-by: Li Zhong <floridsleeves@xxxxxxxxx>
---
drivers/video/backlight/adp8870_bl.c | 6 +++++-
1 file changed, 5 insertions(+), 1 deletion(-)
diff --git a/drivers/video/backlight/adp8870_bl.c b/drivers/video/backlight/adp8870_bl.c
index 8b5213a39527..0eb4ae2ff592 100644
--- a/drivers/video/backlight/adp8870_bl.c
+++ b/drivers/video/backlight/adp8870_bl.c
@@ -567,9 +567,13 @@ static ssize_t adp8870_store(struct device *dev, const char *buf,
return ret;
mutex_lock(&data->lock);
- adp8870_write(data->client, reg, val);
+ ret = adp8870_write(data->client, reg, val);
mutex_unlock(&data->lock);
+ if (ret) {
+ return ret;
+ }
+
return count;
}
--
2.25.1
