Re: [PATCH v2] amdgpu: remove unreachable code

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Am 25.05.21 um 12:40 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>
---
Changes in v2:
   -For the follow advice: https://lore.kernel.org/patchwork/patch/1435074/

  drivers/gpu/drm/amd/amdgpu/amdgpu_uvd.c | 1 -
  1 file changed, 1 deletion(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_uvd.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_uvd.c
index 82f0542..b32ed85 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_uvd.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_uvd.c
@@ -840,7 +840,6 @@ 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();

You also need to remove the BUG() here or otherwise that will crash on an relatively harmless error.

Christian.

  	return -EINVAL;




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