[PATCH v2 5/5] nouveau/gsp: Cleanup IS_ERR_OR_NULL in nvkm_gsp_rpc_rd()

[Hongling Zeng <zenghongling@kylinos.cn>]

nvkm_gsp_rpc_rd() calls nvkm_gsp_rpc_get() which never returns NULL,
only valid pointers or error pointers. Clean up by using IS_ERR()
instead, matching the actual return value contract.

Note: nvkm_gsp_rpc_push() can return NULL when policy is NOWAIT or
NOSEQ, but nvkm_gsp_rpc_rd() uses RECV policy which expects a reply.
If the RPC fails to get a reply, it should return an error pointer,
not NULL.

Signed-off-by: Hongling Zeng <zenghongling@kylinos.cn>
---
 drivers/gpu/drm/nouveau/include/nvkm/subdev/gsp.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/nouveau/include/nvkm/subdev/gsp.h b/drivers/gpu/drm/nouveau/include/nvkm/subdev/gsp.h
index 64fed208e4cf..a061779e0107 100644
--- a/drivers/gpu/drm/nouveau/include/nvkm/subdev/gsp.h
+++ b/drivers/gpu/drm/nouveau/include/nvkm/subdev/gsp.h
@@ -293,7 +293,7 @@ nvkm_gsp_rpc_rd(struct nvkm_gsp *gsp, u32 fn, u32 argc)
 {
 	void *argv = nvkm_gsp_rpc_get(gsp, fn, argc);
 
-	if (IS_ERR_OR_NULL(argv))
+	if (IS_ERR(argv))
 		return argv;
 
 	return nvkm_gsp_rpc_push(gsp, argv, NVKM_GSP_RPC_REPLY_RECV, argc);
-- 
2.25.1