[dpdk-dev] [PATCH] net/i40e: fix scattered Rx enabling

[Qi Zhang]

No need to add additional vlan tag size for max packet size, since
for i40e, the queue's Rx Max Frame Size (rxq->max_pkt_len) already
includes the vlan header size.

Fixes: a3c83a2527e1 ("net/i40e: enable runtime queue setup")
Fixes: 4861cde46116 ("i40e: new poll mode driver")
Cc: stable at dpdk.org

Signed-off-by: Qi Zhang <qi.z.zhang at intel.com>
---
 drivers/net/i40e/i40e_rxtx.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/net/i40e/i40e_rxtx.c b/drivers/net/i40e/i40e_rxtx.c
index 8f727fae6..4d1a5929e 100644
--- a/drivers/net/i40e/i40e_rxtx.c
+++ b/drivers/net/i40e/i40e_rxtx.c
@@ -1718,7 +1718,7 @@ i40e_dev_rx_queue_setup_runtime(struct rte_eth_dev *dev,
 		(uint16_t)(rte_pktmbuf_data_room_size(rxq->mp) -
 			   RTE_PKTMBUF_HEADROOM);
 	int use_scattered_rx =
-		((rxq->max_pkt_len + 2 * I40E_VLAN_TAG_SIZE) > buf_size);
+		(rxq->max_pkt_len > buf_size);
 
 	if (i40e_rx_queue_init(rxq) != I40E_SUCCESS) {
 		PMD_DRV_LOG(ERR,
@@ -2708,7 +2708,7 @@ i40e_rx_queue_init(struct i40e_rx_queue *rxq)
 		RTE_PKTMBUF_HEADROOM);
 
 	/* Check if scattered RX needs to be used. */
-	if ((rxq->max_pkt_len + 2 * I40E_VLAN_TAG_SIZE) > buf_size) {
+	if (rxq->max_pkt_len > buf_size) {
 		dev_data->scattered_rx = 1;
 	}
 
-- 
2.13.6