cpuidle: Avoid NULL argument in cpuidle_switch_governor()

Checks if the new governor is NULL before updating the cupidle_curr_governor. Signed-off-by: gaurav jindal <[email protected]> [ rjw : Subject ] Signed-off-by: Rafael J. Wysocki <[email protected]>
ambv · Jan 5, 2018 · 3cfd68b · 3cfd68b
1 parent 30a7acd
commit 3cfd68b
Showing 1 changed file with 3 additions and 2 deletions.
diff --git a/drivers/cpuidle/governor.c b/drivers/cpuidle/governor.c
@@ -36,14 +36,15 @@ static struct cpuidle_governor * __cpuidle_find_governor(const char *str)
 /**
  * cpuidle_switch_governor - changes the governor
  * @gov: the new target governor
- *
- * NOTE: "gov" can be NULL to specify disabled
  * Must be called with cpuidle_lock acquired.
  */
 int cpuidle_switch_governor(struct cpuidle_governor *gov)
 {
 	struct cpuidle_device *dev;
 
+	if (!gov)
+		return -EINVAL;
+
 	if (gov == cpuidle_curr_governor)
 		return 0;