Merge "msm: kgsl: Verify the user address before reading a perfcounter group"

 */

int adreno_perfcounter_read_group(struct adreno_device *adreno_dev,

	struct kgsl_perfcounter_read_group *reads, unsigned int count)

	struct kgsl_perfcounter_read_group __user *reads, unsigned int count)

{

	struct adreno_perfcounters *counters = adreno_dev->gpudev->perfcounters;

	struct adreno_perfcount_group *group;

	if (reads == NULL || count == 0 || count > 100)

		return -EINVAL;

	/* verify valid inputs group ids and countables */

	for (i = 0; i < count; i++) {

		if (reads[i].groupid >= counters->group_count)

			return -EINVAL;

	}

	list = kmalloc(sizeof(struct kgsl_perfcounter_read_group) * count,

			GFP_KERNEL);

	if (!list)

	/* list iterator */

	for (j = 0; j < count; j++) {

		list[j].value = 0;

		/* Verify that the group ID is within range */

		if (list[j].groupid >= counters->group_count) {

			ret = -EINVAL;

			goto done;

		}

		group = &(counters->groups[list[j].groupid]);

		/* group/counter iterator */