From: Felix Kuehling <felix.kuehl...@amd.com>
[ Upstream commit 316baf09d355aec1179981b6dfe28eba50c5ee5b ]
In amdgpu_dma_buf_move_notify reserve fences for the page table updates
in amdgpu_vm_clear_freed and amdgpu_vm_handle_moved. This fixes a BUG_ON
in dma_resv_add_fence when using SDMA for page table updates.
Signed-off-by: Felix Kuehling <felix.kuehl...@amd.com>
Reviewed-by: Christian König <christian.koe...@amd.com>
Signed-off-by: Alex Deucher <alexander.deuc...@amd.com>
Signed-off-by: Sasha Levin <sas...@kernel.org>
---
drivers/gpu/drm/amd/amdgpu/amdgpu_dma_buf.c | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_dma_buf.c
b/drivers/gpu/drm/amd/amdgpu/amdgpu_dma_buf.c
index 7bd8e33b14be5..e8b3e9520cf6e 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_dma_buf.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_dma_buf.c
@@ -400,7 +400,10 @@ amdgpu_dma_buf_move_notify(struct dma_buf_attachment
*attach)
continue;
}
- r = amdgpu_vm_clear_freed(adev, vm, NULL);
+ /* Reserve fences for two SDMA page table updates */
+ r = dma_resv_reserve_fences(resv, 2);
+ if (!r)
+ r = amdgpu_vm_clear_freed(adev, vm, NULL);
if (!r)
r = amdgpu_vm_handle_moved(adev, vm);
--
2.42.0
