[PATCH 3.16 163/366] xen-netfront: fix locking in connect error path

[Ben Hutchings]

3.16.61-rc1 review patch.  If anyone has any objections, please let me know.

------------------

From: David Vrabel <david.vrabel@xxxxxxxxxx>

commit db8c8ab61a28d7e3eb86d247b342a853263262c3 upstream.

If no queues could be created when connecting to the backend, one of the
error paths would deadlock.

Signed-off-by: David Vrabel <david.vrabel@xxxxxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
Signed-off-by: Ben Hutchings <ben@xxxxxxxxxxxxxxx>
---
 drivers/net/xen-netfront.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/net/xen-netfront.c
+++ b/drivers/net/xen-netfront.c
@@ -2000,7 +2000,7 @@ abort_transaction_no_dev_fatal:
 	info->queues = NULL;
 	rtnl_lock();
 	netif_set_real_num_tx_queues(info->netdev, 0);
-	rtnl_lock();
+	rtnl_unlock();
  out:
 	return err;
 }