[dpdk-dev] [PATCH 04/11] net/bnxt: fix double counting VLAN tags

[Ajit Khaparde <ajit.khaparde@broadcom.com>]

From: Lance Richardson <lance.richardson@broadcom.com>

When determining whether scattered receive mode is needed, the
size of a QinQ header is being added to rxmode.max_rx_pkt_len
before comparing to the receive buffer size, however max_rx_pkt_len
already accounts for the QinQ header size. Fix by simply comparing
rxmode.max_rx_pkt_len against the buffer size.

Fixes: daef48efe5e5 ("net/bnxt: support set MTU")
Signed-off-by: Lance Richardson <lance.richardson@broadcom.com>
Signed-off-by: Ajit Khaparde <ajit.khaparde@broadcom.com>
---
 drivers/net/bnxt/bnxt_ethdev.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/drivers/net/bnxt/bnxt_ethdev.c b/drivers/net/bnxt/bnxt_ethdev.c
index 064a153ec..52a6b94e0 100644
--- a/drivers/net/bnxt/bnxt_ethdev.c
+++ b/drivers/net/bnxt/bnxt_ethdev.c
@@ -638,8 +638,7 @@ static int bnxt_scattered_rx(struct rte_eth_dev *eth_dev)
 
 		buf_size = (uint16_t)(rte_pktmbuf_data_room_size(rxq->mb_pool) -
 				      RTE_PKTMBUF_HEADROOM);
-		if (eth_dev->data->dev_conf.rxmode.max_rx_pkt_len +
-		    VLAN_TAG_SIZE * BNXT_NUM_VLANS > buf_size)
+		if (eth_dev->data->dev_conf.rxmode.max_rx_pkt_len > buf_size)
 			return 1;
 	}
 	return 0;
-- 
2.20.1 (Apple Git-117)