Am 03.07.24 um 11:01 schrieb Bob Zhou:
To avoid null pointer dereference reported by Coverity,
so add null pointer check for the return of amdgpu_device_get_gang().
NAK, that's complete nonsense in the first place.
The pointer is guaranteed to be never NULL or otherwise the logic would
have crashed long before.
Regards,
Christian.
Signed-off-by: Bob Zhou <[email protected]>
---
drivers/gpu/drm/amd/amdgpu/amdgpu_device.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
index bcacf2e35eba..c1d82c346daa 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
@@ -6569,7 +6569,7 @@ struct dma_fence *amdgpu_device_switch_gang(struct
amdgpu_device *adev,
if (old == gang)
break;
- if (!dma_fence_is_signaled(old))
+ if (!old || !dma_fence_is_signaled(old))
return old;
} while (cmpxchg((struct dma_fence __force **)&adev->gang_submit,
