drm/amd/amdgpu/amdgpu_uvd: Fix forgotten unmap buffer object

After the buffer object is successfully mapped,
call amdgpu_bo_kunmap before the function returns.
Signed-off-by: zhanglianjie <zhanglianjie@uniontech.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/amdgpu/amdgpu_uvd.c

@@ -834,6 +834,7 @@ static int amdgpu_uvd_cs_msg(struct amdgpu_uvd_cs_ctx *ctx,
 	handle = msg[2];
 
 	if (handle == 0) {
+		amdgpu_bo_kunmap(bo);
 		DRM_ERROR("Invalid UVD handle!\n");
 		return -EINVAL;
 	}
@@ -892,6 +893,7 @@ static int amdgpu_uvd_cs_msg(struct amdgpu_uvd_cs_ctx *ctx,
 		DRM_ERROR("Illegal UVD message type (%d)!\n", msg_type);
 	}
 
+	amdgpu_bo_kunmap(bo);
 	return -EINVAL;
 }