From patchwork Tue Jun 27 14:00:41 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jingjing Wu X-Patchwork-Id: 25805 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 03AD05323; Tue, 27 Jun 2017 16:06:45 +0200 (CEST) Received: from mga04.intel.com (mga04.intel.com [192.55.52.120]) by dpdk.org (Postfix) with ESMTP id BC1C32C8 for ; Tue, 27 Jun 2017 16:06:37 +0200 (CEST) Received: from fmsmga006.fm.intel.com ([10.253.24.20]) by fmsmga104.fm.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 27 Jun 2017 07:06:18 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.39,399,1493708400"; d="scan'208";a="119771440" Received: from dpdk2.sh.intel.com ([10.239.128.238]) by fmsmga006.fm.intel.com with ESMTP; 27 Jun 2017 07:06:18 -0700 From: Jingjing Wu To: dev@dpdk.org Cc: jingjing.wu@intel.com, helin.zhang@intel.com Date: Tue, 27 Jun 2017 22:00:41 +0800 Message-Id: <1498572056-72971-3-git-send-email-jingjing.wu@intel.com> X-Mailer: git-send-email 2.4.11 In-Reply-To: <1498572056-72971-1-git-send-email-jingjing.wu@intel.com> References: <1498570158-57201-1-git-send-email-jingjing.wu@intel.com> <1498572056-72971-1-git-send-email-jingjing.wu@intel.com> Subject: [dpdk-dev] [PATCH v4 02/17] net/i40e/base: sync nvmupdate command and adminq subtask X-BeenThere: dev@dpdk.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: DPDK patches and discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dev-bounces@dpdk.org Sender: "dev" During NVMupdate, state machine gets into unrecoverable state because i40e_clean_adminq_subtask can get scheduled after the admin queue command but before other state variables are updated. This patch adds locking around admin queue command and update of state variables so that adminq_subtask will have accurate information whenever it gets scheduled. Signed-off-by: Jingjing Wu --- drivers/net/i40e/base/i40e_nvm.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/drivers/net/i40e/base/i40e_nvm.c b/drivers/net/i40e/base/i40e_nvm.c index e896502..90521fa 100644 --- a/drivers/net/i40e/base/i40e_nvm.c +++ b/drivers/net/i40e/base/i40e_nvm.c @@ -899,6 +899,11 @@ enum i40e_status_code i40e_nvmupd_command(struct i40e_hw *hw, hw->nvmupd_state = I40E_NVMUPD_STATE_INIT; } + /* Acquire lock to prevent race condition where adminq_task + * can execute after i40e_nvmupd_nvm_read/write but before state + * variables (nvm_wait_opcode, nvm_release_on_done) are updated + */ + i40e_acquire_spinlock(&hw->aq.arq_spinlock); switch (hw->nvmupd_state) { case I40E_NVMUPD_STATE_INIT: status = i40e_nvmupd_state_init(hw, cmd, bytes, perrno); @@ -934,6 +939,7 @@ enum i40e_status_code i40e_nvmupd_command(struct i40e_hw *hw, *perrno = -ESRCH; break; } + i40e_release_spinlock(&hw->aq.arq_spinlock); return status; }