From patchwork Thu Feb 18 14:34:12 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Zhang, Helin" X-Patchwork-Id: 10639 X-Patchwork-Delegate: bruce.richardson@intel.com Return-Path: X-Original-To: patchwork@dpdk.org Delivered-To: patchwork@dpdk.org Received: from [92.243.14.124] (localhost [IPv6:::1]) by dpdk.org (Postfix) with ESMTP id 31187C40C; Thu, 18 Feb 2016 15:35:00 +0100 (CET) Received: from mga01.intel.com (mga01.intel.com [192.55.52.88]) by dpdk.org (Postfix) with ESMTP id 60107C3E8 for ; Thu, 18 Feb 2016 15:34:57 +0100 (CET) Received: from fmsmga002.fm.intel.com ([10.253.24.26]) by fmsmga101.fm.intel.com with ESMTP; 18 Feb 2016 06:34:56 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.22,465,1449561600"; d="scan'208";a="918504642" Received: from shvmail01.sh.intel.com ([10.239.29.42]) by fmsmga002.fm.intel.com with ESMTP; 18 Feb 2016 06:34:55 -0800 Received: from shecgisg004.sh.intel.com (shecgisg004.sh.intel.com [10.239.29.89]) by shvmail01.sh.intel.com with ESMTP id u1IEYsEL018270; Thu, 18 Feb 2016 22:34:54 +0800 Received: from shecgisg004.sh.intel.com (localhost [127.0.0.1]) by shecgisg004.sh.intel.com (8.13.6/8.13.6/SuSE Linux 0.8) with ESMTP id u1IEYpOA018575; Thu, 18 Feb 2016 22:34:53 +0800 Received: (from hzhan75@localhost) by shecgisg004.sh.intel.com (8.13.6/8.13.6/Submit) id u1IEYpgx018571; Thu, 18 Feb 2016 22:34:51 +0800 From: Helin Zhang To: dev@dpdk.org Date: Thu, 18 Feb 2016 22:34:12 +0800 Message-Id: <1455806076-18497-7-git-send-email-helin.zhang@intel.com> X-Mailer: git-send-email 1.7.4.1 In-Reply-To: <1455806076-18497-1-git-send-email-helin.zhang@intel.com> References: <1455776683-11790-1-git-send-email-helin.zhang@intel.com> <1455806076-18497-1-git-send-email-helin.zhang@intel.com> Subject: [dpdk-dev] [PATCH v3 06/30] i40e/base: check for stopped admin queue X-BeenThere: dev@dpdk.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: patches and discussions about DPDK List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dev-bounces@dpdk.org Sender: "dev" It's possible that while waiting for the spinlock, another entity (that owns the spinlock) has shut down the admin queue. If it then attempts to use the queue, it will panic. It adds a check for this condition on the receive side. This matches an existing check on the send queue side. Signed-off-by: Helin Zhang --- drivers/net/i40e/base/i40e_adminq.c | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/drivers/net/i40e/base/i40e_adminq.c b/drivers/net/i40e/base/i40e_adminq.c index 998582c..e1a162e 100644 --- a/drivers/net/i40e/base/i40e_adminq.c +++ b/drivers/net/i40e/base/i40e_adminq.c @@ -1035,6 +1035,13 @@ enum i40e_status_code i40e_clean_arq_element(struct i40e_hw *hw, /* take the lock before we start messing with the ring */ i40e_acquire_spinlock(&hw->aq.arq_spinlock); + if (hw->aq.arq.count == 0) { + i40e_debug(hw, I40E_DEBUG_AQ_MESSAGE, + "AQRX: Admin queue not initialized.\n"); + ret_code = I40E_ERR_QUEUE_EMPTY; + goto clean_arq_element_err; + } + /* set next_to_use to head */ #ifdef PF_DRIVER #ifdef INTEGRATED_VF @@ -1113,6 +1120,7 @@ clean_arq_element_out: /* Set pending if needed, unlock and return */ if (pending != NULL) *pending = (ntc > ntu ? hw->aq.arq.count : 0) + (ntu - ntc); +clean_arq_element_err: i40e_release_spinlock(&hw->aq.arq_spinlock); #ifdef PF_DRIVER