memif: fix "remove barriers" commit

[vpp.git] / src / plugins / memif / device.c

diff --git a/src/plugins/memif/device.c b/src/plugins/memif/device.c
index befc0b5..7c1ac36 100644 (file)
--- a/src/plugins/memif/device.c
+++ b/src/plugins/memif/device.c
@@ -315,8 +315,8 @@ memif_interface_tx_zc_inline (vlib_main_t * vm, vlib_node_runtime_t * node,
   u16 head, tail;
 
 retry:
-  slot = tail = __atomic_load_n (&ring->tail, __ATOMIC_ACQUIRE);
-  head = ring->head;
+  tail = __atomic_load_n (&ring->tail, __ATOMIC_ACQUIRE);
+  slot = head = ring->head;
 
   n_free = tail - mq->last_tail;
   if (n_free >= 16)