From mboxrd@z Thu Jan 1 00:00:00 1970 From: Thomas Falcon Subject: [PATCH net] ibmvnic: Wait for device response when changing MAC Date: Mon, 29 Jan 2018 13:45:05 -0600 Message-ID: <1517255105-13634-1-git-send-email-tlfalcon@linux.vnet.ibm.com> Cc: nfont@linux.vnet.ibm.com, jallen@linux.vnet.ibm.com, Thomas Falcon To: netdev@vger.kernel.org Return-path: Received: from mx0a-001b2d01.pphosted.com ([148.163.156.1]:34546 "EHLO mx0a-001b2d01.pphosted.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751593AbeA2TpP (ORCPT ); Mon, 29 Jan 2018 14:45:15 -0500 Received: from pps.filterd (m0098404.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.16.0.22/8.16.0.22) with SMTP id w0TJiODZ113859 for ; Mon, 29 Jan 2018 14:45:15 -0500 Received: from e15.ny.us.ibm.com (e15.ny.us.ibm.com [129.33.205.205]) by mx0a-001b2d01.pphosted.com with ESMTP id 2ft8bc41ru-1 (version=TLSv1.2 cipher=AES256-SHA bits=256 verify=NOT) for ; Mon, 29 Jan 2018 14:45:12 -0500 Received: from localhost by e15.ny.us.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted for from ; Mon, 29 Jan 2018 14:45:11 -0500 Sender: netdev-owner@vger.kernel.org List-ID: Wait for a response from the VNIC server before exiting after setting the MAC address. The resolves an issue with bonding a VNIC client in ALB or TLB modes. The bonding driver was changing the MAC address more rapidly than the device could respond, causing the following errors. "bond0: the hw address of slave eth2 is in use by the bond; couldn't find a slave with a free hw address to give it (this should not have happened)" If the function waits until the change is finalized, these errors are avoided. Signed-off-by: Thomas Falcon --- drivers/net/ethernet/ibm/ibmvnic.c | 21 ++++++++++++++------- 1 file changed, 14 insertions(+), 7 deletions(-) diff --git a/drivers/net/ethernet/ibm/ibmvnic.c b/drivers/net/ethernet/ibm/ibmvnic.c index b65f5f3..d4e8733 100644 --- a/drivers/net/ethernet/ibm/ibmvnic.c +++ b/drivers/net/ethernet/ibm/ibmvnic.c @@ -1543,15 +1543,19 @@ static int __ibmvnic_set_mac(struct net_device *netdev, struct sockaddr *p) crq.change_mac_addr.first = IBMVNIC_CRQ_CMD; crq.change_mac_addr.cmd = CHANGE_MAC_ADDR; ether_addr_copy(&crq.change_mac_addr.mac_addr[0], addr->sa_data); + + init_completion(&adapter->fw_done); ibmvnic_send_crq(adapter, &crq); + wait_for_completion(&adapter->fw_done); /* netdev->dev_addr is changed in handle_change_mac_rsp function */ - return 0; + return adapter->fw_done_rc ? -EIO : 0; } static int ibmvnic_set_mac(struct net_device *netdev, void *p) { struct ibmvnic_adapter *adapter = netdev_priv(netdev); struct sockaddr *addr = p; + int rc; if (adapter->state == VNIC_PROBED) { memcpy(&adapter->desired.mac, addr, sizeof(struct sockaddr)); @@ -1559,9 +1563,9 @@ static int ibmvnic_set_mac(struct net_device *netdev, void *p) return 0; } - __ibmvnic_set_mac(netdev, addr); + rc = __ibmvnic_set_mac(netdev, addr); - return 0; + return rc; } /** @@ -3558,8 +3562,8 @@ static void handle_error_indication(union ibmvnic_crq *crq, ibmvnic_reset(adapter, VNIC_RESET_NON_FATAL); } -static void handle_change_mac_rsp(union ibmvnic_crq *crq, - struct ibmvnic_adapter *adapter) +static int handle_change_mac_rsp(union ibmvnic_crq *crq, + struct ibmvnic_adapter *adapter) { struct net_device *netdev = adapter->netdev; struct device *dev = &adapter->vdev->dev; @@ -3568,10 +3572,13 @@ static void handle_change_mac_rsp(union ibmvnic_crq *crq, rc = crq->change_mac_addr_rsp.rc.code; if (rc) { dev_err(dev, "Error %ld in CHANGE_MAC_ADDR_RSP\n", rc); - return; + goto out; } memcpy(netdev->dev_addr, &crq->change_mac_addr_rsp.mac_addr[0], ETH_ALEN); +out: + complete(&adapter->fw_done); + return rc; } static void handle_request_cap_rsp(union ibmvnic_crq *crq, @@ -4031,7 +4038,7 @@ static void ibmvnic_handle_crq(union ibmvnic_crq *crq, break; case CHANGE_MAC_ADDR_RSP: netdev_dbg(netdev, "Got MAC address change Response\n"); - handle_change_mac_rsp(crq, adapter); + adapter->fw_done_rc = handle_change_mac_rsp(crq, adapter); break; case ERROR_INDICATION: netdev_dbg(netdev, "Got Error Indication\n"); -- 2.7.5