[dpdk-dev] [PATCH v4 1/4] net/af_xdp: enqueue buf ring when allocate Tx queue fails

From: Xiaolong Ye <xiaolong.ye@intel.com>
To: dev@dpdk.org, Ferruh Yigit <ferruh.yigit@intel.com>,
	David Marchand <david.marchand@redhat.com>
Cc: Qi Zhang <qi.z.zhang@intel.com>,
	Karlsson Magnus <magnus.karlsson@intel.com>,
	Topel Bjorn <bjorn.topel@intel.com>,
	Xiaolong Ye <xiaolong.ye@intel.com>
Subject: [dpdk-dev] [PATCH v4 1/4] net/af_xdp: enqueue buf ring when allocate Tx queue fails
Date: Wed, 17 Apr 2019 21:49:43 +0800	[thread overview]
Message-ID: <20190417134946.1250-2-xiaolong.ye@intel.com> (raw)
In-Reply-To: <20190417134946.1250-1-xiaolong.ye@intel.com>

When it fails to allocate enough slots in Tx queue for transmitting
packets, we need to return the dequeued addrs to buf ring.

Fixes: f1debd77efaf ("net/af_xdp: introduce AF_XDP PMD")

Reviewed-by: David Marchand <david.marchand@redhat.com>
Signed-off-by: Xiaolong Ye <xiaolong.ye@intel.com>
---
 drivers/net/af_xdp/rte_eth_af_xdp.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/net/af_xdp/rte_eth_af_xdp.c b/drivers/net/af_xdp/rte_eth_af_xdp.c
index 007a1c6b4..5cc643ce2 100644
--- a/drivers/net/af_xdp/rte_eth_af_xdp.c
+++ b/drivers/net/af_xdp/rte_eth_af_xdp.c
@@ -276,6 +276,7 @@ eth_af_xdp_tx(void *queue, struct rte_mbuf **bufs, uint16_t nb_pkts)
 
 	if (xsk_ring_prod__reserve(&txq->tx, nb_pkts, &idx_tx) != nb_pkts) {
 		kick_tx(txq);
+		rte_ring_enqueue_bulk(umem->buf_ring, addrs, nb_pkts, NULL);
 		return 0;
 	}
 
-- 
2.17.1

