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From:   Alex Deucher <alexdeucher@gmail.com>
Date:   Mon, 24 May 2021 14:48:55 -0400
Message-ID: <CADnq5_N3WkoYHcn8b1-qZ23+t=E9xxV5fV_1Lwqck6x2dUPqmA@mail.gmail.com>
Subject: Re: [PATCH] drm/amdgpu: remove unreachable code
To:     Jiapeng Chong <jiapeng.chong@linux.alibaba.com>
Cc:     "Deucher, Alexander" <alexander.deucher@amd.com>,
        Dave Airlie <airlied@linux.ie>,
        LKML <linux-kernel@vger.kernel.org>,
        Maling list - DRI developers 
        <dri-devel@lists.freedesktop.org>,
        "moderated list:DMA BUFFER SHARING FRAMEWORK" 
        <linaro-mm-sig@lists.linaro.org>,
        amd-gfx list <amd-gfx@lists.freedesktop.org>,
        Christian Koenig <christian.koenig@amd.com>,
        linux-media <linux-media@vger.kernel.org>
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Applied.  Thanks!

Alex

On Mon, May 24, 2021 at 6:47 AM Jiapeng Chong
<jiapeng.chong@linux.alibaba.com> wrote:
>
> 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@linux.alibaba.com>
> Signed-off-by: Jiapeng Chong <jiapeng.chong@linux.alibaba.com>
> ---
>  drivers/gpu/drm/amd/amdgpu/amdgpu_uvd.c | 2 --
>  1 file changed, 2 deletions(-)
>
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_uvd.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_uvd.c
> index 82f0542..375b346 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_uvd.c
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_uvd.c
> @@ -842,8 +842,6 @@ static int amdgpu_uvd_cs_msg(struct amdgpu_uvd_cs_ctx *ctx,
>                 DRM_ERROR("Illegal UVD message type (%d)!\n", msg_type);
>                 return -EINVAL;
>         }
> -       BUG();
> -       return -EINVAL;
>  }
>
>  /**
> --
> 1.8.3.1
>