[PATCH -next] sh: intc: replace simple_strtoul to kstrtoul

The function simple_strtoul performs no error checking
in scenarios where the input value overflows the intended
output variable.

We can replace the use of the simple_strtoul with the safer
alternatives kstrtoul. For fail case, we also print the extra
message.

Signed-off-by: Hongbo Li <[email protected]>
---
 drivers/sh/intc/userimask.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/sh/intc/userimask.c b/drivers/sh/intc/userimask.c
index abe9091827cd..c9892338fc22 100644
--- a/drivers/sh/intc/userimask.c
+++ b/drivers/sh/intc/userimask.c
@@ -33,7 +33,8 @@ store_intc_userimask(struct device *dev,
 {
 	unsigned long level;
 
-	level = simple_strtoul(buf, NULL, 10);
+	if (kstrtoul(buf, 10, &level))
+		return -EINVAL;
 
 	/*
 	 * Minimal acceptable IRQ levels are in the 2 - 16 range, but
-- 
2.34.1