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-rw-r--r--drivers/video/backlight/adp5520_bl.c7
1 files changed, 5 insertions, 2 deletions
diff --git a/drivers/video/backlight/adp5520_bl.c b/drivers/video/backlight/adp5520_bl.c
index 962d120f6d0d..c84701b7ca6e 100644
--- a/drivers/video/backlight/adp5520_bl.c
+++ b/drivers/video/backlight/adp5520_bl.c
@@ -143,13 +143,16 @@ static int adp5520_bl_setup(struct backlight_device *bl)
static ssize_t adp5520_show(struct device *dev, char *buf, int reg)
{
struct adp5520_bl *data = dev_get_drvdata(dev);
- int error;
+ int ret;
uint8_t reg_val;
mutex_lock(&data->lock);
- error = adp5520_read(data->master, reg, &reg_val);
+ ret = adp5520_read(data->master, reg, &reg_val);
mutex_unlock(&data->lock);
+ if (ret < 0)
+ return ret;
+
return sprintf(buf, "%u\n", reg_val);
}