Re: [PATCH] drm/amdgpu: remove unreachable code

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Am 24.05.21 um 12:46 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.

Mhm, that is a NAK. IIRC we explicitely added that code because some compiler versions complained that we don't return a value at the end of the function.

I suggest to drop the return from the default case and the BUG() instead.

Regards,
Christian.


Reported-by: Abaci Robot <abaci@xxxxxxxxxxxxxxxxx>
Signed-off-by: Jiapeng Chong <jiapeng.chong@xxxxxxxxxxxxxxxxx>
---
  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;
  }
/**




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