drm/amdgpu: restrict the sched jobs number to power of two
Signed-off-by: Chunming Zhou <David1.Zhou@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
CC: stable@vger.kernel.org
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
index 54af6ce..587ff71 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
@@ -949,6 +949,15 @@
*/
static void amdgpu_check_arguments(struct amdgpu_device *adev)
{
+ if (amdgpu_sched_jobs < 4) {
+ dev_warn(adev->dev, "sched jobs (%d) must be at least 4\n",
+ amdgpu_sched_jobs);
+ amdgpu_sched_jobs = 4;
+ } else if (!amdgpu_check_pot_argument(amdgpu_sched_jobs)){
+ dev_warn(adev->dev, "sched jobs (%d) must be a power of 2\n",
+ amdgpu_sched_jobs);
+ amdgpu_sched_jobs = roundup_pow_of_two(amdgpu_sched_jobs);
+ }
/* vramlimit must be a power of two */
if (!amdgpu_check_pot_argument(amdgpu_vram_limit)) {
dev_warn(adev->dev, "vram limit (%d) must be a power of 2\n",