We are initializing the entity before the scheduler is actually initialized.
This can lead to all kind of problem, but especially NULL pointer deref because of Nayan's scheduler work. Signed-off-by: Christian König <[email protected]> --- drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c | 36 ++++++++++++++++++--------------- 1 file changed, 20 insertions(+), 16 deletions(-) diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c index 2a0e1b4752ff..11a12483c995 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c @@ -104,8 +104,6 @@ static void amdgpu_ttm_mem_global_release(struct drm_global_reference *ref) static int amdgpu_ttm_global_init(struct amdgpu_device *adev) { struct drm_global_reference *global_ref; - struct amdgpu_ring *ring; - struct drm_sched_rq *rq; int r; /* ensure reference is false in case init fails */ @@ -138,21 +136,10 @@ static int amdgpu_ttm_global_init(struct amdgpu_device *adev) mutex_init(&adev->mman.gtt_window_lock); - ring = adev->mman.buffer_funcs_ring; - rq = &ring->sched.sched_rq[DRM_SCHED_PRIORITY_KERNEL]; - r = drm_sched_entity_init(&adev->mman.entity, - &rq, 1, NULL); - if (r) { - DRM_ERROR("Failed setting up TTM BO move run queue.\n"); - goto error_entity; - } - adev->mman.mem_global_referenced = true; return 0; -error_entity: - drm_global_item_unref(&adev->mman.bo_global_ref.ref); error_bo: drm_global_item_unref(&adev->mman.mem_global_ref); error_mem: @@ -162,8 +149,6 @@ static int amdgpu_ttm_global_init(struct amdgpu_device *adev) static void amdgpu_ttm_global_fini(struct amdgpu_device *adev) { if (adev->mman.mem_global_referenced) { - drm_sched_entity_destroy(adev->mman.entity.sched, - &adev->mman.entity); mutex_destroy(&adev->mman.gtt_window_lock); drm_global_item_unref(&adev->mman.bo_global_ref.ref); drm_global_item_unref(&adev->mman.mem_global_ref); @@ -1921,10 +1906,29 @@ void amdgpu_ttm_set_buffer_funcs_status(struct amdgpu_device *adev, bool enable) { struct ttm_mem_type_manager *man = &adev->mman.bdev.man[TTM_PL_VRAM]; uint64_t size; + int r; - if (!adev->mman.initialized || adev->in_gpu_reset) + if (!adev->mman.initialized || adev->in_gpu_reset || + adev->mman.buffer_funcs_enabled == enable) return; + if (enable) { + struct amdgpu_ring *ring; + struct drm_sched_rq *rq; + + ring = adev->mman.buffer_funcs_ring; + rq = &ring->sched.sched_rq[DRM_SCHED_PRIORITY_KERNEL]; + r = drm_sched_entity_init(&adev->mman.entity, &rq, 1, NULL); + if (r) { + DRM_ERROR("Failed setting up TTM BO move entity (%d)\n", + r); + return; + } + } else { + drm_sched_entity_destroy(adev->mman.entity.sched, + &adev->mman.entity); + } + /* this just adjusts TTM size idea, which sets lpfn to the correct value */ if (enable) size = adev->gmc.real_vram_size; -- 2.14.1 _______________________________________________ amd-gfx mailing list [email protected] https://lists.freedesktop.org/mailman/listinfo/amd-gfx
