drm/amdgpu: check contiguous flags instead of mm_node

Drop the last user of drm_mm_node.
Signed-off-by: Christian König <christian.koenig@amd.com>
Acked-by: Felix Kuehling <Felix.Kuehling@amd.com>
Tested-by: Nirmoy Das <nirmoy.das@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c

@@ -576,10 +576,10 @@ static int amdgpu_bo_move(struct ttm_buffer_object *bo, bool evict,
  *
  * Called by ttm_mem_io_reserve() ultimately via ttm_bo_vm_fault()
  */
-static int amdgpu_ttm_io_mem_reserve(struct ttm_device *bdev, struct ttm_resource *mem)
+static int amdgpu_ttm_io_mem_reserve(struct ttm_device *bdev,
+				     struct ttm_resource *mem)
 {
 	struct amdgpu_device *adev = amdgpu_ttm_adev(bdev);
-	struct drm_mm_node *mm_node = mem->mm_node;
 	size_t bus_size = (size_t)mem->num_pages << PAGE_SHIFT;
 
 	switch (mem->mem_type) {
@@ -593,12 +593,9 @@ static int amdgpu_ttm_io_mem_reserve(struct ttm_device *bdev, struct ttm_resourc
 		/* check if it's visible */
 		if ((mem->bus.offset + bus_size) > adev->gmc.visible_vram_size)
 			return -EINVAL;
-		/* Only physically contiguous buffers apply. In a contiguous
-		 * buffer, size of the first mm_node would match the number of
-		 * pages in ttm_resource.
-		 */
+
 		if (adev->mman.aper_base_kaddr &&
-		    (mm_node->size == mem->num_pages))
+		    mem->placement & TTM_PL_FLAG_CONTIGUOUS)
 			mem->bus.addr = (u8 *)adev->mman.aper_base_kaddr +
 					mem->bus.offset;