diff --git a/net/9p/client.c b/net/9p/client.c
index bc7b03537699..e3cfdff37327 100644
--- a/net/9p/client.c
+++ b/net/9p/client.c
@@ -579,6 +579,8 @@ p9_client_rpc(struct p9_client *c, int8_t type, const char *fmt, ...)
 	va_start(ap, fmt);
 	err = p9pdu_vwritef(req->tc, c->proto_version, fmt, ap);
 	va_end(ap);
+	if (err)
+		goto reterr;
 	p9pdu_finalize(req->tc);
 
 	err = c->trans_mod->request(c, req);
diff --git a/net/9p/protocol.c b/net/9p/protocol.c
index 3acd3afb20c8..45c15f491401 100644
--- a/net/9p/protocol.c
+++ b/net/9p/protocol.c
@@ -122,9 +122,8 @@ static size_t
 pdu_write_u(struct p9_fcall *pdu, const char __user *udata, size_t size)
 {
 	size_t len = MIN(pdu->capacity - pdu->size, size);
-	int err = copy_from_user(&pdu->sdata[pdu->size], udata, len);
-	if (err)
-		printk(KERN_WARNING "pdu_write_u returning: %d\n", err);
+	if (copy_from_user(&pdu->sdata[pdu->size], udata, len))
+		len = 0;
 
 	pdu->size += len;
 	return size - len;