libmemif: cleanup queue info while memif connecting

[vpp.git] / extras / libmemif / src / main.c

diff --git a/extras/libmemif/src/main.c b/extras/libmemif/src/main.c
index 9b5bdd2..372bf75 100644 (file)
--- a/extras/libmemif/src/main.c
+++ b/extras/libmemif/src/main.c
@@ -1398,11 +1398,13 @@ memif_buffer_alloc (memif_conn_handle_t conn, uint16_t qid,
   uint16_t mask = (1 << mq->log2_ring_size) - 1;
   uint16_t head = ring->head;
   uint16_t tail = ring->tail;
+  uint16_t ring_size;
   uint16_t s0, s1, ns;
   *count_out = 0;
   int i, err = MEMIF_ERR_SUCCESS;      /* 0 */
 
-  ns = (1 << mq->log2_ring_size) - head + tail;
+  ring_size = (1 << mq->log2_ring_size);
+  ns = ring_size - head + tail;
 
   /* calculate number of chain buffers */
   if (size > ring->desc[0].buffer_length)