[dpdk-dev] [PATCH 1/2] ixgbe: vector rx rearm after queue reset

[Eric Kinzie <ehkinzie@gmail.com>]

zero values in ixgbe_reset_rx_queue() used by vector receive so that
rearming the rx queue happens at the right time.  Not doing so can in
some cases result in the software inadvertently setting the card's rx
tail pointer equal to the head pointer, which indicates that there are
no descriptors available.  This causes receive to stop indefinitely
on that queue.

Fixes: 01fa1d6215fa ("ixgbe: unify Rx setup")

Signed-off-by: Eric Kinzie <ehkinzie@gmail.com>
---
 drivers/net/ixgbe/ixgbe_rxtx.c |    4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/net/ixgbe/ixgbe_rxtx.c b/drivers/net/ixgbe/ixgbe_rxtx.c
index 3ace8a8..1e840b6 100644
--- a/drivers/net/ixgbe/ixgbe_rxtx.c
+++ b/drivers/net/ixgbe/ixgbe_rxtx.c
@@ -2261,6 +2261,10 @@ ixgbe_reset_rx_queue(struct ixgbe_adapter *adapter, struct ixgbe_rx_queue *rxq)
 	rxq->nb_rx_hold = 0;
 	rxq->pkt_first_seg = NULL;
 	rxq->pkt_last_seg = NULL;
+#ifdef RTE_IXGBE_INC_VECTOR
+	rxq->rxrearm_nb = 0;
+	rxq->rxrearm_start = 0;
+#endif
 }
 
 int
-- 
1.7.10.4