[PATCH v4 1/2] net/ice: fix scalar Rx path segment

From: Mingjin Ye <mingjinx.ye@intel.com>
To: dev@dpdk.org
Cc: qiming.yang@intel.com, stable@dpdk.org, yidingx.zhou@intel.com,
	Mingjin Ye <mingjinx.ye@intel.com>,
	Qi Zhang <qi.z.zhang@intel.com>,
	Jingjing Wu <jingjing.wu@intel.com>,
	Ferruh Yigit <ferruh.yigit@intel.com>,
	Wenzhuo Lu <wenzhuo.lu@intel.com>,
	Xiaoyun Li <xiaoyun.li@intel.com>
Subject: [PATCH v4 1/2] net/ice: fix scalar Rx path segment
Date: Fri, 11 Nov 2022 16:12:40 +0000	[thread overview]
Message-ID: <20221111161241.861732-1-mingjinx.ye@intel.com> (raw)
In-Reply-To: <20221111120401.802805-2-mingjinx.ye@intel.com>

CRC is stripped by the hardware in the scattered Rx path. The last buffer
is invalid if it's packet length is zero.

This patch adds a judgment for the last buffer length to fix this issue,
it would free the mbuf associated to the last one if the last buffer is
empty.

Fixes: 6eac0b7fde95 ("net/ice: support advance Rx/Tx")
Cc: stable@dpdk.org

Signed-off-by: Mingjin Ye <mingjinx.ye@intel.com>
---
 drivers/net/ice/ice_rxtx.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/net/ice/ice_rxtx.c b/drivers/net/ice/ice_rxtx.c
index 0a2b0376ac..e6ddd2513d 100644
--- a/drivers/net/ice/ice_rxtx.c
+++ b/drivers/net/ice/ice_rxtx.c
@@ -2111,6 +2111,10 @@ ice_recv_scattered_pkts(void *rx_queue,
 			} else
 				rxm->data_len = (uint16_t)(rx_packet_len -
 							   RTE_ETHER_CRC_LEN);
+		} else if (rx_packet_len == 0) {
+			rte_pktmbuf_free_seg(rxm);
+			first_seg->nb_segs--;
+			last_seg->next = NULL;
 		}
 
 		first_seg->port = rxq->port_id;
-- 
2.34.1

