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cpuidle: Avoid NULL argument in cpuidle_switch_governor()

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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>
This commit is contained in:
gaurav jindal 2018-01-05 14:01:30 +01:00 committed by Rafael J. Wysocki
parent 30a7acd573
commit 3cfd68b5ba
1 changed files with 3 additions and 2 deletions
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5
drivers/cpuidle/governor.c
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@ -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;