From patchwork Tue Jun 19 21:30:55 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ajit Khaparde X-Patchwork-Id: 41300 X-Patchwork-Delegate: ferruh.yigit@amd.com Return-Path: X-Original-To: patchwork@dpdk.org Delivered-To: patchwork@dpdk.org Received: from [92.243.14.124] (localhost [127.0.0.1]) by dpdk.org (Postfix) with ESMTP id 9D9B91B4D1; Tue, 19 Jun 2018 23:32:18 +0200 (CEST) Received: from rnd-relay.smtp.broadcom.com (rnd-relay.smtp.broadcom.com [192.19.229.170]) by dpdk.org (Postfix) with ESMTP id 91B011B059; Tue, 19 Jun 2018 23:31:11 +0200 (CEST) Received: from nis-sj1-27.broadcom.com (nis-sj1-27.lvn.broadcom.net [10.75.144.136]) by rnd-relay.smtp.broadcom.com (Postfix) with ESMTP id 7A39130C07D; Tue, 19 Jun 2018 14:31:10 -0700 (PDT) DKIM-Filter: OpenDKIM Filter v2.10.3 rnd-relay.smtp.broadcom.com 7A39130C07D DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=broadcom.com; s=dkimrelay; t=1529443870; bh=eLL8HHYQ0hYo6m6jeC0VVjDmsY7rvkQCH2WIdr0k/Ns=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=GqBfY8qsXeojhPwudGlIMmRFRY3waTDQJbyUyHFgQ8hMlka+ku8Q3KQO1ySaq03tG wMWIc14hYx30HiXfFapCXFJq5O7EcV3Lyy0IMlqZb8hIDjTBKVcTgOe/p387nT4Ctf Oq8JmNFYFVUtcFGogPevrLhsY8hBfEq2gQAdknhI= Received: from C02VPB22HTD6.dhcp.broadcom.net (c02vpb22htd6.dhcp.broadcom.net [10.136.50.120]) by nis-sj1-27.broadcom.com (Postfix) with ESMTP id 52562AC0768; Tue, 19 Jun 2018 14:31:10 -0700 (PDT) From: Ajit Khaparde To: dev@dpdk.org Cc: ferruh.yigit@intel.com, stable@dpdk.org Date: Tue, 19 Jun 2018 14:30:55 -0700 Message-Id: <20180619213058.12273-29-ajit.khaparde@broadcom.com> X-Mailer: git-send-email 2.15.1 (Apple Git-101) In-Reply-To: <20180619213058.12273-1-ajit.khaparde@broadcom.com> References: <20180619213058.12273-1-ajit.khaparde@broadcom.com> Subject: [dpdk-dev] [PATCH 28/31] net/bnxt: fix set MTU X-BeenThere: dev@dpdk.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: DPDK patches and discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dev-bounces@dpdk.org Sender: "dev" There is no need to update hardware configuration 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 --- drivers/net/bnxt/bnxt_ethdev.c | 12 +++++++++--- 1 file changed, 9 insertions(+), 3 deletions(-) diff --git a/drivers/net/bnxt/bnxt_ethdev.c b/drivers/net/bnxt/bnxt_ethdev.c index 9cfa43778..1145bc195 100644 --- a/drivers/net/bnxt/bnxt_ethdev.c +++ b/drivers/net/bnxt/bnxt_ethdev.c @@ -1597,6 +1597,7 @@ 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; @@ -1604,9 +1605,14 @@ 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;