From patchwork Tue Apr 7 18:32:55 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Mitch Williams X-Patchwork-Id: 458755 X-Patchwork-Delegate: jeffrey.t.kirsher@intel.com Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Received: from whitealder.osuosl.org (whitealder.osuosl.org [140.211.166.138]) by ozlabs.org (Postfix) with ESMTP id E2733140283 for ; Wed, 8 Apr 2015 04:32:59 +1000 (AEST) Received: from localhost (localhost [127.0.0.1]) by whitealder.osuosl.org (Postfix) with ESMTP id 54AEC8C198; Tue, 7 Apr 2015 18:32:59 +0000 (UTC) X-Virus-Scanned: amavisd-new at osuosl.org Received: from whitealder.osuosl.org ([127.0.0.1]) by localhost (.osuosl.org [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id Kiy5pysIvwU1; Tue, 7 Apr 2015 18:32:58 +0000 (UTC) Received: from ash.osuosl.org (ash.osuosl.org [140.211.166.34]) by whitealder.osuosl.org (Postfix) with ESMTP id CE8698C039; Tue, 7 Apr 2015 18:32:58 +0000 (UTC) X-Original-To: intel-wired-lan@lists.osuosl.org Delivered-To: intel-wired-lan@lists.osuosl.org Received: from hemlock.osuosl.org (hemlock.osuosl.org [140.211.166.133]) by ash.osuosl.org (Postfix) with ESMTP id 49BE41C2574 for ; Tue, 7 Apr 2015 18:32:57 +0000 (UTC) Received: from localhost (localhost [127.0.0.1]) by hemlock.osuosl.org (Postfix) with ESMTP id 463DA93924 for ; Tue, 7 Apr 2015 18:32:57 +0000 (UTC) X-Virus-Scanned: amavisd-new at osuosl.org Received: from hemlock.osuosl.org ([127.0.0.1]) by localhost (.osuosl.org [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id zjL8yeI1JydA for ; Tue, 7 Apr 2015 18:32:56 +0000 (UTC) X-Greylist: domain auto-whitelisted by SQLgrey-1.7.6 Received: from mga02.intel.com (mga02.intel.com [134.134.136.20]) by hemlock.osuosl.org (Postfix) with ESMTP id 966DF93920 for ; Tue, 7 Apr 2015 18:32:56 +0000 (UTC) Received: from fmsmga001.fm.intel.com ([10.253.24.23]) by orsmga101.jf.intel.com with ESMTP; 07 Apr 2015 11:32:27 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.11,539,1422950400"; d="scan'208";a="691601235" Received: from mawilli1-mobl.jf.intel.com ([10.166.14.28]) by fmsmga001.fm.intel.com with ESMTP; 07 Apr 2015 11:32:26 -0700 From: Mitch Williams To: intel-wired-lan@lists.osuosl.org Date: Tue, 7 Apr 2015 11:32:55 -0700 Message-Id: <1428431575-168522-1-git-send-email-mitch.a.williams@intel.com> X-Mailer: git-send-email 2.1.0 Subject: [Intel-wired-lan] [PATCH v2 net-next] i40e: stop VF rings X-BeenThere: intel-wired-lan@lists.osuosl.org X-Mailman-Version: 2.1.18-1 Precedence: list List-Id: Intel Wired Ethernet Linux Kernel Driver Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Errors-To: intel-wired-lan-bounces@lists.osuosl.org Sender: "Intel-wired-lan" Explicitly stop the rings belonging to each VF when disabling SR-IOV. Even though the VFs were gone, and the associated VSIs were removed, the rings were not stopped, and in some circumstances the hardware would continue to access the memory formerly used by the rings, causing memory corruption or DMAR errors, both of which would lead to general malaise of the kernel. To relieve this condition, explicitly stop all the rings associated with each VF before releasing its resources. Signed-off-by: Mitch Williams v2: use correct variable name (changed in a different patch) --- drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c b/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c index 4d69e1f..20ae88b 100644 --- a/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c +++ b/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c @@ -733,6 +733,11 @@ void i40e_free_vfs(struct i40e_pf *pf) while (test_and_set_bit(__I40E_VF_DISABLE, &pf->state)) usleep_range(1000, 2000); + for (i = 0; i < pf->num_alloc_vfs; i++) + if (test_bit(I40E_VF_STAT_INIT, &pf->vf[i].vf_states)) + i40e_vsi_control_rings(pf->vsi[pf->vf[i].lan_vsi_idx], + false); + /* Disable IOV before freeing resources. This lets any VF drivers * running in the host get themselves cleaned up before we yank * the carpet out from underneath their feet.