[patch] Input: lm8323 - missing error check in lm8323_set_disable()

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The missing error handling here is not especially harmful but static
checkers complain that "i" can be used uninitialized.

Signed-off-by: Dan Carpenter <dan.carpenter@xxxxxxxxxx>

diff --git a/drivers/input/keyboard/lm8323.c b/drivers/input/keyboard/lm8323.c
index cb32e2b..21bea52 100644
--- a/drivers/input/keyboard/lm8323.c
+++ b/drivers/input/keyboard/lm8323.c
@@ -616,6 +616,8 @@ static ssize_t lm8323_set_disable(struct device *dev,
 	unsigned int i;
 
 	ret = kstrtouint(buf, 10, &i);
+	if (ret)
+		return ret;
 
 	mutex_lock(&lm->lock);
 	lm->kp_enabled = !i;
--
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