drm/amdgpu: Use allowed_domains for pinning dmabufs

When determining the domains for pinning DMABufs, filter allowed_domains
and fail with a warning if VRAM is forbidden and GTT is not an allowed
domain.

Fixes: f5e7fab ("drm/amdgpu: allow pinning DMA-bufs into VRAM if all importers can do P2P")
Suggested-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Felix Kuehling <felix.kuehling@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
(cherry picked from commit 3940796)

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

@@ -77,7 +77,7 @@ static int amdgpu_dma_buf_pin(struct dma_buf_attachment *attach)
 {
 	struct dma_buf *dmabuf = attach->dmabuf;
 	struct amdgpu_bo *bo = gem_to_amdgpu_bo(dmabuf->priv);
-	u32 domains = bo->preferred_domains;
+	u32 domains = bo->allowed_domains;
 
 	dma_resv_assert_held(dmabuf->resv);
 
@@ -93,6 +93,9 @@ static int amdgpu_dma_buf_pin(struct dma_buf_attachment *attach)
 	if (domains & AMDGPU_GEM_DOMAIN_VRAM)
 		bo->flags |= AMDGPU_GEM_CREATE_CPU_ACCESS_REQUIRED;
 
+	if (WARN_ON(!domains))
+		return -EINVAL;
+
 	return amdgpu_bo_pin(bo, domains);
 }