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From:   Jiapeng Chong <jiapeng.chong@linux.alibaba.com>
To:     alexander.deucher@amd.com
Cc:     christian.koenig@amd.com, airlied@linux.ie, daniel@ffwll.ch,
        sumit.semwal@linaro.org, amd-gfx@lists.freedesktop.org,
        dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org,
        linux-media@vger.kernel.org, linaro-mm-sig@lists.linaro.org,
        Jiapeng Chong <jiapeng.chong@linux.alibaba.com>
Subject: [PATCH v3] amdgpu: remove unreachable code
Date:   Fri, 28 May 2021 17:29:18 +0800
Message-Id: <1622194158-70898-1-git-send-email-jiapeng.chong@linux.alibaba.com>
Precedence: bulk

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>
---
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;
 }
 
-- 
1.8.3.1