cifsd: fix WARNING: Possible unnecessary 'out of memory' message

WARNING: Possible unnecessary 'out of memory' message
902: FILE: fs/cifsd/smb2pdu.c:569:
+       if (!work->response_buf) {
+               ksmbd_err("Failed to allocate %zu bytes buffer\n", sz);

Fix a warning from checkpatch.pl.
Signed-off-by: Namjae Jeon <namjae.jeon@samsung.com>
Signed-off-by: Steve French <stfrench@microsoft.com>

fs/cifsd/smb2pdu.c

@@ -565,10 +565,8 @@ int smb2_allocate_rsp_buf(struct ksmbd_work *work)
 	else
 		work->response_buf = kvmalloc(sz, GFP_KERNEL | __GFP_ZERO);
 
-	if (!work->response_buf) {
-		ksmbd_err("Failed to allocate %zu bytes buffer\n", sz);
+	if (!work->response_buf)
 		return -ENOMEM;
-	}
 
 	work->response_sz = sz;
 	return 0;