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net/bnxt: fix set MTU

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There is no need to update bnxt_hwrm_vnic_plcmode_cfg if new MTU is
not greater than the max data the mbuf can accommodate.

Fixes: daef48efe5e5 ("net/bnxt: support set MTU")
Cc: stable@dpdk.org

Signed-off-by: Ajit Khaparde <ajit.khaparde@broadcom.com>
This commit is contained in:
Ajit Khaparde 2018-06-28 13:15:43 -07:00 committed by Ferruh Yigit
parent 0cc1fcdeb5
commit e80e88a097
1 changed files with 9 additions and 3 deletions
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12
drivers/net/bnxt/bnxt_ethdev.c
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@ -1582,6 +1582,7 @@ static int bnxt_mtu_set_op(struct rte_eth_dev *eth_dev, uint16_t new_mtu)
for (i = 0; i < bp->nr_vnics; i++) {
struct bnxt_vnic_info *vnic = &bp->vnic_info[i];
uint16_t size = 0;
vnic->mru = bp->eth_dev->data->mtu + ETHER_HDR_LEN +
ETHER_CRC_LEN + VLAN_TAG_SIZE * 2;
@ -1589,9 +1590,14 @@ static int bnxt_mtu_set_op(struct rte_eth_dev *eth_dev, uint16_t new_mtu)
if (rc)
break;
rc = bnxt_hwrm_vnic_plcmode_cfg(bp, vnic);
if (rc)
return rc;
size = rte_pktmbuf_data_room_size(bp->rx_queues[0]->mb_pool);
size -= RTE_PKTMBUF_HEADROOM;
if (size < new_mtu) {
rc = bnxt_hwrm_vnic_plcmode_cfg(bp, vnic);
if (rc)
return rc;
}
}
return rc;