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drm/amdgpu: fixx NULL pointer deref in gmc_v9_0_get_vm_pte 

We not only need to make sure that we have a BO, but also that the BO
has some backing store.

Fixes: d1a372af1c ("drm/amdgpu: Set MTYPE in PTE based on BO flags")
Signed-off-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Felix Kuehling <Felix.Kuehling@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Reviewed-by: Luben Tuikov <luben.tuikov@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Christian König 2022-12-07 08:47:30 +01:00 committed by Alex Deucher
parent 47ea20762b
commit 9c3db58bf8
1 changed files with 3 additions and 1 deletions
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4
drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c
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@ -1185,6 +1185,8 @@ static void gmc_v9_0_get_vm_pte(struct amdgpu_device *adev,
struct amdgpu_bo_va_mapping *mapping,
uint64_t *flags)
{
struct amdgpu_bo *bo = mapping->bo_va->base.bo;
*flags &= ~AMDGPU_PTE_EXECUTABLE;
*flags |= mapping->flags & AMDGPU_PTE_EXECUTABLE;
@ -1196,7 +1198,7 @@ static void gmc_v9_0_get_vm_pte(struct amdgpu_device *adev,
*flags &= ~AMDGPU_PTE_VALID;
}
if (mapping->bo_va->base.bo)
if (bo && bo->tbo.resource)
gmc_v9_0_get_coherence_flags(adev, mapping->bo_va->base.bo,
mapping, flags);
}