[dpdk-dev] [PATCH 3/3] net/virtio: fix wrong Rx/Tx method for secondary process

[Yuanhan Liu]

If the primary enables the vector Rx/Tx path, the current code would
let the secondary always choose the non vector Rx/Tx path. This results
to a Rx/Tx method mismatch between primary and secondary process. Werid
errors then may happen, something like:

    PMD: virtio_xmit_pkts() tx: virtqueue_enqueue error: -14

Fix it by choosing the correct Rx/Tx callbacks for the secondary process.
That is, use vector path if it's given.

Fixes: 8d8393fb1861 ("virtio: pick simple Rx/Tx")

Cc: stable at dpdk.org
Signed-off-by: Yuanhan Liu <yuanhan.liu at linux.intel.com>
---
 drivers/net/virtio/virtio_ethdev.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/drivers/net/virtio/virtio_ethdev.c b/drivers/net/virtio/virtio_ethdev.c
index a9f7ae4..04d93de 100644
--- a/drivers/net/virtio/virtio_ethdev.c
+++ b/drivers/net/virtio/virtio_ethdev.c
@@ -1325,7 +1325,11 @@ static int virtio_dev_xstats_get_names(struct rte_eth_dev *dev,
 			return 1;
 
 		set_vtpci_ops(eth_dev, hw);
-		rx_func_get(eth_dev);
+		if (hw->use_simple_rxtx) {
+			eth_dev->tx_pkt_burst = virtio_xmit_pkts_simple;
+			eth_dev->rx_pkt_burst = virtio_recv_pkts_vec;
+		} else
+			rx_func_get(eth_dev);
 		return 0;
 	}
 
-- 
1.9.0