drivers/video/backlight/lm3639_bl.c: return proper error in lm3639_bled_mode_store() error paths

Signed-off-by: Axel Lin <axel.lin@ingics.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

drivers/video/backlight/lm3639_bl.c

@@ -206,11 +206,11 @@ static ssize_t lm3639_bled_mode_store(struct device *dev,
 
 out:
 	dev_err(pchip->dev, "%s:i2c access fail to register\n", __func__);
-	return size;
+	return ret;
 
 out_input:
 	dev_err(pchip->dev, "%s:input conversion fail\n", __func__);
-	return size;
+	return ret;
 
 }