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Commit 50e66c7e authored by Eduardo Valentin's avatar Eduardo Valentin
Browse files

drivers: thermal: add check when unregistering cpu cooling 



This patch avoids NULL pointer accesses while unregistering
cpu cooling devices, in case a NULL pointer is received.

Cc: Zhang Rui <rui.zhang@intel.com>
Cc: linux-pm@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Signed-off-by: default avatarEduardo Valentin <eduardo.valentin@ti.com>
parent a8892d83

drivers/thermal/cpu_cooling.c

+5 −1
Original line number Diff line number Diff line
@@ -498,8 +498,12 @@ EXPORT_SYMBOL_GPL(cpufreq_cooling_register); 
 */

void cpufreq_cooling_unregister(struct thermal_cooling_device *cdev)

{

	struct cpufreq_cooling_device *cpufreq_dev = cdev->devdata;

	struct cpufreq_cooling_device *cpufreq_dev;



	if (!cdev)

		return;



	cpufreq_dev = cdev->devdata;

	mutex_lock(&cooling_cpufreq_lock);

	cpufreq_dev_count--;