From mboxrd@z Thu Jan 1 00:00:00 1970 From: Sathya Perla Subject: [PATCH 1/4] be2net: provision VF resources before enabling SR-IOV Date: Wed, 8 May 2013 17:35:47 +0530 Message-ID: <1368014750-25065-2-git-send-email-sathya.perla@emulex.com> References: <1368014750-25065-1-git-send-email-sathya.perla@emulex.com> Mime-Version: 1.0 Content-Type: text/plain To: Return-path: Received: from cmexedge2.ext.emulex.com ([138.239.224.100]:10926 "EHLO CMEXEDGE2.ext.emulex.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754813Ab3EHMDJ (ORCPT ); Wed, 8 May 2013 08:03:09 -0400 In-Reply-To: <1368014750-25065-1-git-send-email-sathya.perla@emulex.com> Sender: netdev-owner@vger.kernel.org List-ID: When the PF driver calls pci_enable_sriov(), the VFs may be probed inline before the call returns. So, the resources required for all VFs must be provisioned by the PF driver *before* calling pci_enable_sriov(); else, VF probe will fail. Signed-off-by: Sathya Perla --- drivers/net/ethernet/emulex/benet/be_main.c | 21 +++++++++++++-------- 1 files changed, 13 insertions(+), 8 deletions(-) diff --git a/drivers/net/ethernet/emulex/benet/be_main.c b/drivers/net/ethernet/emulex/benet/be_main.c index 6c52a60..b304b83 100644 --- a/drivers/net/ethernet/emulex/benet/be_main.c +++ b/drivers/net/ethernet/emulex/benet/be_main.c @@ -2783,6 +2783,8 @@ static void be_vf_clear(struct be_adapter *adapter) goto done; } + pci_disable_sriov(adapter->pdev); + for_all_vfs(adapter, vf_cfg, vf) { if (lancer_chip(adapter)) be_cmd_set_mac_list(adapter, NULL, 0, vf + 1); @@ -2792,7 +2794,6 @@ static void be_vf_clear(struct be_adapter *adapter) be_cmd_if_destroy(adapter, vf_cfg->if_handle, vf + 1); } - pci_disable_sriov(adapter->pdev); done: kfree(adapter->vf_cfg); adapter->num_vfs = 0; @@ -2889,13 +2890,8 @@ static int be_vf_setup(struct be_adapter *adapter) dev_info(dev, "Device supports %d VFs and not %d\n", adapter->dev_num_vfs, num_vfs); adapter->num_vfs = min_t(u16, num_vfs, adapter->dev_num_vfs); - - status = pci_enable_sriov(adapter->pdev, num_vfs); - if (status) { - dev_err(dev, "SRIOV enable failed\n"); - adapter->num_vfs = 0; + if (!adapter->num_vfs) return 0; - } } status = be_vf_setup_init(adapter); @@ -2944,6 +2940,15 @@ static int be_vf_setup(struct be_adapter *adapter) be_cmd_enable_vf(adapter, vf + 1); } + + if (!old_vfs) { + status = pci_enable_sriov(adapter->pdev, adapter->num_vfs); + if (status) { + dev_err(dev, "SRIOV enable failed\n"); + adapter->num_vfs = 0; + goto err; + } + } return 0; err: dev_err(dev, "VF setup failed\n"); @@ -3198,7 +3203,7 @@ static int be_setup(struct be_adapter *adapter) be_cmd_set_flow_control(adapter, adapter->tx_fc, adapter->rx_fc); - if (be_physfn(adapter) && num_vfs) { + if (be_physfn(adapter)) { if (adapter->dev_num_vfs) be_vf_setup(adapter); else -- 1.7.1