Re: [PATCH v3] amdgpu: remove unreachable code

[Christian König]

Am 28.05.21 um 11:29 schrieb Jiapeng Chong:
> In the function amdgpu_uvd_cs_msg(), every branch in the switch
> statement will have a return, so the code below the switch statement
> will not be executed.
>
> Eliminate the follow smatch warning:
>
> drivers/gpu/drm/amd/amdgpu/amdgpu_uvd.c:845 amdgpu_uvd_cs_msg() warn:
> ignoring unreachable code.
>
> Reported-by: Abaci Robot <abaci@xxxxxxxxxxxxxxxxx>
> Signed-off-by: Jiapeng Chong <jiapeng.chong@xxxxxxxxxxxxxxxxx>

Reviewed-by: Christian König <christian.koenig@xxxxxxx>

> ---
> Changes in v2:
>    -For the follow advice: https://lore.kernel.org/patchwork/patch/1435968/
>
>   drivers/gpu/drm/amd/amdgpu/amdgpu_uvd.c | 3 +--
>   1 file changed, 1 insertion(+), 2 deletions(-)
>
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_uvd.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_uvd.c
> index c6dbc08..35f6874 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_uvd.c
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_uvd.c
> @@ -829,9 +829,8 @@ static int amdgpu_uvd_cs_msg(struct amdgpu_uvd_cs_ctx *ctx,
>   
>   	default:
>   		DRM_ERROR("Illegal UVD message type (%d)!\n", msg_type);
> -		return -EINVAL;
>   	}
> -	BUG();
> +
>   	return -EINVAL;
>   }
>