[PATCH AUTOSEL 6.6 21/83] drm/amd/amdgpu: Check tbo resource pointer

[Sasha Levin]

From: Asad Kamal <asad.ka...@amd.com>

[ Upstream commit 6cd2b872643bb29bba01a8ac739138db7bd79007 ]

Validate tbo resource pointer, skip if NULL

Signed-off-by: Asad Kamal <asad.ka...@amd.com>
Reviewed-by: Christian König <christian.koe...@amd.com>
Reviewed-by: Lijo Lazar <lijo.la...@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_device.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c 
b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
index e1227b7c71b16..8c95b877155a3 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
@@ -4479,7 +4479,8 @@ static int amdgpu_device_recover_vram(struct 
amdgpu_device *adev)
                shadow = vmbo->shadow;
 
                /* No need to recover an evicted BO */
-               if (shadow->tbo.resource->mem_type != TTM_PL_TT ||
+               if (!shadow->tbo.resource ||
+                   shadow->tbo.resource->mem_type != TTM_PL_TT ||
                    shadow->tbo.resource->start == AMDGPU_BO_INVALID_OFFSET ||
                    shadow->parent->tbo.resource->mem_type != TTM_PL_VRAM)
                        continue;
-- 
2.43.0