drm/amdgpu: drm/amdgpu: Handle IOMMU enabled case

Handle all DMA IOMMU group related dependencies before the
group is removed and we try to access it after free.

v2:
Move the actul handling function to TTM

Signed-off-by: Andrey Grodzovsky <andrey.grodzovsky@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
index 48089dc..ec63496 100644 (file)
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
@@ -3872,6 +3872,8 @@ void amdgpu_device_fini_hw(struct amdgpu_device *adev)
 
        amdgpu_device_ip_fini_early(adev);
 
+       ttm_device_clear_dma_mappings(&adev->mman.bdev);
+
        amdgpu_gart_dummy_page_fini(adev);
 
        amdgpu_device_unmap_mmio(adev);