Re: [PATCH] drm/amdkfd: Fix unchecked return value

[Kuehling, Felix]

Alex already applied an equivalent patch by Colin King (attached for 
reference).

Regards,
 Â Felix

On 3/18/2019 2:05 PM, Gustavo A. R. Silva wrote:
> Assign return value of function amdgpu_bo_sync_wait() to variable ret
> for its further check.
>
> Addresses-Coverity-ID: 1443914 ("Logically dead code")
> Fixes: c60cd590cb7d ("drm/amdgpu: Replace ttm_bo_wait with amdgpu_bo_sync_wait")
> Signed-off-by: Gustavo A. R. Silva <gustavo@xxxxxxxxxxxxxx>
> ---
>   drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c | 3 ++-
>   1 file changed, 2 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c
> index 1921dec3df7a..fb621abcb006 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c
> @@ -906,7 +906,8 @@ static int init_kfd_vm(struct amdgpu_vm *vm, void **process_info,
>   		pr_err("validate_pt_pd_bos() failed\n");
>   		goto validate_pd_fail;
>   	}
> -	amdgpu_bo_sync_wait(vm->root.base.bo, AMDGPU_FENCE_OWNER_KFD, false);
> +	ret = amdgpu_bo_sync_wait(vm->root.base.bo, AMDGPU_FENCE_OWNER_KFD,
> +				  false);
>   	if (ret)
>   		goto wait_pd_fail;
>   	amdgpu_bo_fence(vm->root.base.bo,
> --- Begin Message ---
> From: Colin Ian King <colin.king@xxxxxxxxxxxxx>
>
> An earlier commit replaced ttm_bo_wait with amdgpu_bo_sync_wait and
> removed the error return assignment to variable ret. Fix this by adding
> the assignment back. Also break line to clean up checkpatch overly
> long line warning.
>
> Detected by CoverityScan, CID#1477327 ("Logically dead code")
>
> Fixes: c60cd590cb7d ("drm/amdgpu: Replace ttm_bo_wait with amdgpu_bo_sync_wait")
> Signed-off-by: Colin Ian King <colin.king@xxxxxxxxxxxxx>
> ---
>  drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c | 3 ++-
>  1 file changed, 2 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c
> index 1921dec3df7a..92993baac91a 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c
> @@ -906,7 +906,8 @@ static int init_kfd_vm(struct amdgpu_vm *vm, void **process_info,
>  		pr_err("validate_pt_pd_bos() failed\n");
>  		goto validate_pd_fail;
>  	}
> -	amdgpu_bo_sync_wait(vm->root.base.bo, AMDGPU_FENCE_OWNER_KFD, false);
> +	ret = amdgpu_bo_sync_wait(vm->root.base.bo,
> +				  AMDGPU_FENCE_OWNER_KFD, false);
>  	if (ret)
>  		goto wait_pd_fail;
>  	amdgpu_bo_fence(vm->root.base.bo,
> -- 
> 2.20.1
>
> _______________________________________________
> amd-gfx mailing list
> amd-gfx@xxxxxxxxxxxxxxxxxxxxx
> https://lists.freedesktop.org/mailman/listinfo/amd-gfx
> --- End Message ---