From: Lin.Cao <lincao12@xxxxxxx>
commit 6c032c37ac3ef3b7df30937c785ecc4da428edc0 upstream.
v1: Vmbo->shadow is used to back vram bo up when vram lost. So that we
should set shadow as vmbo->shadow to recover vmbo->bo
v2: Modify if(vmbo->shadow) shadow = vmbo->shadow as if(!vmbo->shadow)
continue;
Fixes: e18aaea733da ("drm/amdgpu: move shadow_list to amdgpu_bo_vm")
Reviewed-by: Christian König <christian.koenig@xxxxxxx>
Signed-off-by: Lin.Cao <lincao12@xxxxxxx>
Signed-off-by: Alex Deucher <alexander.deucher@xxxxxxx>
Cc: stable@xxxxxxxxxxxxxxx
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/gpu/drm/amd/amdgpu/amdgpu_device.c | 6 +++++-
1 file changed, 5 insertions(+), 1 deletion(-)
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
@@ -4368,7 +4368,11 @@ static int amdgpu_device_recover_vram(st
dev_info(adev->dev, "recover vram bo from shadow start\n");
mutex_lock(&adev->shadow_list_lock);
list_for_each_entry(vmbo, &adev->shadow_list, shadow_list) {
- shadow = &vmbo->bo;
+ /* If vm is compute context or adev is APU, shadow will be NULL */
+ if (!vmbo->shadow)
+ continue;
+ shadow = vmbo->shadow;
+
/* No need to recover an evicted BO */
if (shadow->tbo.resource->mem_type != TTM_PL_TT ||
shadow->tbo.resource->start == AMDGPU_BO_INVALID_OFFSET ||
