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 <gauravjindal1104@gmail.com>
[ rjw : Subject ]
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

diff --git a/drivers/cpuidle/governor.c b/drivers/cpuidle/governor.c
index 4e78263e34a476c2280b5c317cd054bc5d3e6c86..5d359aff3cc538005f6ebeb3b32a2ded2dd5605b 100644 (file)
--- 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;