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Commit 87654273 authored by Zhao Yakui's avatar Zhao Yakui Committed by Len Brown
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ACPI : Check parameter when calling acpi_processor_get/set_throttling 

It is necessary to check the parameter when calling the function of
acpi_processor_get/set_throttling function so as to avoid the NULL
pointer reference in pr or throttling.

http://bugzilla.kernel.org/show_bug.cgi?id=9747



Signed-off-by: default avatarZhao Yakui <yakui.zhao@intel.com>
Signed-off-by: default avatarLen Brown <len.brown@intel.com>
parent 3abbd337

drivers/acpi/processor_throttling.c

+15 −0
Original line number Original line Diff line number Diff line
@@ -589,6 +589,11 @@ static int acpi_processor_get_throttling(struct acpi_processor *pr) 
	cpumask_t saved_mask;

	cpumask_t saved_mask;

	int ret;

	int ret;





	if (!pr)

		return -EINVAL;



	if (!pr->flags.throttling)

		return -ENODEV;

	/*

	/*

	 * Migrate task to the cpu pointed by pr.

	 * Migrate task to the cpu pointed by pr.

	 */

	 */
@@ -743,6 +748,16 @@ int acpi_processor_set_throttling(struct acpi_processor *pr, int state) 
{

{

	cpumask_t saved_mask;

	cpumask_t saved_mask;

	int ret;

	int ret;



	if (!pr)

		return -EINVAL;



	if (!pr->flags.throttling)

		return -ENODEV;



	if ((state < 0) || (state > (pr->throttling.state_count - 1)))

		return -EINVAL;



	/*

	/*

	 * Migrate task to the cpu pointed by pr.

	 * Migrate task to the cpu pointed by pr.

	 */

	 */