From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mga11.intel.com (mga11.intel.com [192.55.52.93]) by dpdk.org (Postfix) with ESMTP id D24388E9D for ; Fri, 15 Jan 2016 03:41:15 +0100 (CET) Received: from orsmga002.jf.intel.com ([10.7.209.21]) by fmsmga102.fm.intel.com with ESMTP; 14 Jan 2016 18:41:15 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.22,297,1449561600"; d="scan'208";a="890867486" Received: from shvmail01.sh.intel.com ([10.239.29.42]) by orsmga002.jf.intel.com with ESMTP; 14 Jan 2016 18:41:14 -0800 Received: from shecgisg004.sh.intel.com (shecgisg004.sh.intel.com [10.239.29.89]) by shvmail01.sh.intel.com with ESMTP id u0F2fBLR002319; Fri, 15 Jan 2016 10:41:11 +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 u0F2f8jb000701; Fri, 15 Jan 2016 10:41:10 +0800 Received: (from hzhan75@localhost) by shecgisg004.sh.intel.com (8.13.6/8.13.6/Submit) id u0F2f87s000697; Fri, 15 Jan 2016 10:41:08 +0800 From: Helin Zhang To: dev@dpdk.org Date: Fri, 15 Jan 2016 10:40:30 +0800 Message-Id: <1452825653-623-7-git-send-email-helin.zhang@intel.com> X-Mailer: git-send-email 1.7.4.1 In-Reply-To: <1452825653-623-1-git-send-email-helin.zhang@intel.com> References: <1452825653-623-1-git-send-email-helin.zhang@intel.com> Subject: [dpdk-dev] [PATCH 06/29] 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: , X-List-Received-Date: Fri, 15 Jan 2016 02:41:16 -0000 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 -- 1.9.3