linux-kernel - Re: [PATCH v3] amdgpu: remove unreachable code

Open Source and information security mailing list archives

Date:   Tue, 1 Jun 2021 21:57:35 -0400
From:   Alex Deucher <alexdeucher@...il.com>
To:     Christian König <christian.koenig@....com>
Cc:     Jiapeng Chong <jiapeng.chong@...ux.alibaba.com>,
        "Deucher, Alexander" <alexander.deucher@....com>,
        Dave Airlie <airlied@...ux.ie>,
        LKML <linux-kernel@...r.kernel.org>,
        Maling list - DRI developers 
        <dri-devel@...ts.freedesktop.org>,
        "moderated list:DMA BUFFER SHARING FRAMEWORK" 
        <linaro-mm-sig@...ts.linaro.org>,
        amd-gfx list <amd-gfx@...ts.freedesktop.org>,
        Daniel Vetter <daniel@...ll.ch>,
        Sumit Semwal <sumit.semwal@...aro.org>,
        linux-media <linux-media@...r.kernel.org>
Subject: Re: [PATCH v3] amdgpu: remove unreachable code

Applied.  Thanks!

On Fri, May 28, 2021 at 8:18 AM Christian König
<christian.koenig@....com> wrote:
>
> 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@...ux.alibaba.com>
> > Signed-off-by: Jiapeng Chong <jiapeng.chong@...ux.alibaba.com>
>
> Reviewed-by: Christian König <christian.koenig@....com>
>
> > ---
> > 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;
> >   }
> >
>
> _______________________________________________
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> amd-gfx@...ts.freedesktop.org
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