[lm-sensors] [PATCH 2/4] hwmon: (applesmc) Do not return random value in error case

[Guenter Roeck]

If a bad parameter is passed to applesmc_read_motion_sensor(), an uninitialized
and thus arbitrary value is returned. Fix by returning immediately if a bad
parameter is detected.

Cc: Henrik Rydberg <rydberg at euromail.se>
Signed-off-by: Guenter Roeck <linux at roeck-us.net>
---
 drivers/hwmon/applesmc.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/hwmon/applesmc.c b/drivers/hwmon/applesmc.c
index f082e48..cc8dd57 100644
--- a/drivers/hwmon/applesmc.c
+++ b/drivers/hwmon/applesmc.c
@@ -450,7 +450,7 @@ static int applesmc_read_motion_sensor(int index, s16 *value)
 		ret = applesmc_read_key(MOTION_SENSOR_Z_KEY, buffer, 2);
 		break;
 	default:
-		ret = -EINVAL;
+		return -EINVAL;
 	}
 
 	*value = ((s16)buffer[0] << 8) | buffer[1];
-- 
1.7.9.7