From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mx0a-001b2d01.pphosted.com (mx0a-001b2d01.pphosted.com [148.163.156.1]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id 3v7yDV0gJVzDq5W for ; Thu, 26 Jan 2017 08:02:33 +1100 (AEDT) Received: from pps.filterd (m0098396.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.16.0.20/8.16.0.20) with SMTP id v0PKwh21143814 for ; Wed, 25 Jan 2017 16:02:31 -0500 Received: from e37.co.us.ibm.com (e37.co.us.ibm.com [32.97.110.158]) by mx0a-001b2d01.pphosted.com with ESMTP id 286xtqc5ck-1 (version=TLSv1.2 cipher=AES256-SHA bits=256 verify=NOT) for ; Wed, 25 Jan 2017 16:02:31 -0500 Received: from localhost by e37.co.us.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted for from ; Wed, 25 Jan 2017 14:02:29 -0700 From: Thomas Falcon To: netdev@vger.kernel.org Cc: linuxppc-dev@lists.ozlabs.org, wvoigt@us.ibm.com, nfont@linux.vnet.ibm.com, jallen@linux.vnet.ibm.com, tlfalcon@linux.vnet.ibm.com Subject: [PATCH net 2/5] ibmvnic: Fix MTU settings Date: Wed, 25 Jan 2017 15:02:20 -0600 In-Reply-To: <1485378143-5084-1-git-send-email-tlfalcon@linux.vnet.ibm.com> References: <1485378143-5084-1-git-send-email-tlfalcon@linux.vnet.ibm.com> Message-Id: <1485378143-5084-2-git-send-email-tlfalcon@linux.vnet.ibm.com> List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , In the current driver, the MTU is set to the maximum value capable for the backing device. This patch sets the MTU to the default value for a Linux net device. It also corrects a discrepancy between MTU values received from firmware, which includes the ethernet header length, and net device MTU values. Finally, it removes redundant min/max MTU assignments after device initialization. Signed-off-by: Thomas Falcon --- drivers/net/ethernet/ibm/ibmvnic.c | 12 +++++------- 1 file changed, 5 insertions(+), 7 deletions(-) diff --git a/drivers/net/ethernet/ibm/ibmvnic.c b/drivers/net/ethernet/ibm/ibmvnic.c index 48debde2..f95f6a4 100644 --- a/drivers/net/ethernet/ibm/ibmvnic.c +++ b/drivers/net/ethernet/ibm/ibmvnic.c @@ -1496,7 +1496,7 @@ static void init_sub_crqs(struct ibmvnic_adapter *adapter, int retry) adapter->req_rx_queues = adapter->opt_rx_comp_queues; adapter->req_rx_add_queues = adapter->max_rx_add_queues; - adapter->req_mtu = adapter->max_mtu; + adapter->req_mtu = adapter->netdev->mtu + ETH_HLEN; } total_queues = adapter->req_tx_queues + adapter->req_rx_queues; @@ -2626,12 +2626,12 @@ static void handle_query_cap_rsp(union ibmvnic_crq *crq, break; case MIN_MTU: adapter->min_mtu = be64_to_cpu(crq->query_capability.number); - netdev->min_mtu = adapter->min_mtu; + netdev->min_mtu = adapter->min_mtu - ETH_HLEN; netdev_dbg(netdev, "min_mtu = %lld\n", adapter->min_mtu); break; case MAX_MTU: adapter->max_mtu = be64_to_cpu(crq->query_capability.number); - netdev->max_mtu = adapter->max_mtu; + netdev->max_mtu = adapter->max_mtu - ETH_HLEN; netdev_dbg(netdev, "max_mtu = %lld\n", adapter->max_mtu); break; case MAX_MULTICAST_FILTERS: @@ -3672,9 +3672,7 @@ static void handle_crq_init_rsp(struct work_struct *work) goto task_failed; netdev->real_num_tx_queues = adapter->req_tx_queues; - netdev->mtu = adapter->req_mtu; - netdev->min_mtu = adapter->min_mtu; - netdev->max_mtu = adapter->max_mtu; + netdev->mtu = adapter->req_mtu - ETH_HLEN; if (adapter->failover) { adapter->failover = false; @@ -3814,7 +3812,7 @@ static int ibmvnic_probe(struct vio_dev *dev, const struct vio_device_id *id) } netdev->real_num_tx_queues = adapter->req_tx_queues; - netdev->mtu = adapter->req_mtu; + netdev->mtu = adapter->req_mtu - ETH_HLEN; rc = register_netdev(netdev); if (rc) { -- 1.8.3.1