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drm/amdgpu: shadow in shadow_list without tbo.mem.start cause page fault in sriov TDR

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shadow was added into shadow_list by amdgpu_bo_create_shadow.
meanwhile, shadow->tbo.mem was not fully configured.
tbo.mem would be fully configured by amdgpu_vm_sdma_map_table until calling amdgpu_vm_clear_bo.
If sriov TDR occurred between amdgpu_bo_create_shadow and amdgpu_vm_sdma_map_table,
amdgpu_device_recover_vram would deal with shadow without tbo.mem.start.

Signed-off-by: Wentao Lou <Wentao.Lou@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
wentalou 2019-04-12 15:01:14 +08:00 committed by Alex Deucher
parent f4bbebf8e7
commit b575f10dbd
1 changed files with 1 additions and 0 deletions
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drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
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@ -3165,6 +3165,7 @@ static int amdgpu_device_recover_vram(struct amdgpu_device *adev)
/* No need to recover an evicted BO */
if (shadow->tbo.mem.mem_type != TTM_PL_TT ||
shadow->tbo.mem.start == AMDGPU_BO_INVALID_OFFSET ||
shadow->parent->tbo.mem.mem_type != TTM_PL_VRAM)
continue;