Commit c0d64cb0 authored by Len Brown's avatar Len Brown
Browse files

cpuidle: add cpuidle_unregister_driver() error check 



Assure that cpuidle_unregister_driver() will not clobber
the registered driver if unregistered by somebody else.

Signed-off-by: default avatarLen Brown <len.brown@intel.com>
parent 6b2c676b

drivers/cpuidle/driver.c

+4 −1
Original line number Diff line number Diff line
@@ -45,8 +45,11 @@ EXPORT_SYMBOL_GPL(cpuidle_register_driver); 
 */

void cpuidle_unregister_driver(struct cpuidle_driver *drv)

{

	if (!drv)

	if (drv != cpuidle_curr_driver) {

		WARN(1, "invalid cpuidle_unregister_driver(%s)\n",

			drv->name);

		return;

	}



	spin_lock(&cpuidle_driver_lock);

	cpuidle_curr_driver = NULL;