xen/9pfs: fix return value check in xen_9pfs_front_probe()

[karo-tx-linux.git] / net / 9p / trans_xen.c

diff --git a/net/9p/trans_xen.c b/net/9p/trans_xen.c
index 71e85643b3f96db09de3330263f556fedba65257..83fe487f460ef8c5c38af2b90b71536b018ab639 100644 (file)
--- a/net/9p/trans_xen.c
+++ b/net/9p/trans_xen.c
@@ -454,8 +454,8 @@ static int xen_9pfs_front_probe(struct xenbus_device *dev,
                        goto error_xenbus;
        }
        priv->tag = xenbus_read(xbt, dev->nodename, "tag", NULL);
-       if (!priv->tag) {
-               ret = -EINVAL;
+       if (IS_ERR(priv->tag)) {
+               ret = PTR_ERR(priv->tag);
                goto error_xenbus;
        }
        ret = xenbus_transaction_end(xbt, 0);