From patchwork Sun Nov 27 09:35:17 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jingjing Wu X-Patchwork-Id: 17272 X-Patchwork-Delegate: ferruh.yigit@amd.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 DD17E316B; Sun, 27 Nov 2016 10:35:53 +0100 (CET) Received: from mga05.intel.com (mga05.intel.com [192.55.52.43]) by dpdk.org (Postfix) with ESMTP id 4AD6E2BD8 for ; Sun, 27 Nov 2016 10:35:51 +0100 (CET) Received: from fmsmga006.fm.intel.com ([10.253.24.20]) by fmsmga105.fm.intel.com with ESMTP; 27 Nov 2016 01:35:51 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.31,705,1473145200"; d="scan'208";a="36060157" Received: from dpdk2.sh.intel.com ([10.239.128.246]) by fmsmga006.fm.intel.com with ESMTP; 27 Nov 2016 01:35:50 -0800 From: Jingjing Wu To: dev@dpdk.org Cc: jingjing.wu@intel.com, helin.zhang@intel.com Date: Sun, 27 Nov 2016 17:35:17 +0800 Message-Id: <1480239317-7827-1-git-send-email-jingjing.wu@intel.com> X-Mailer: git-send-email 2.4.11 Subject: [dpdk-dev] [PATCH] net/i40evf: fix casting between structs 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" Casting from structs which lay out data in typed members to structs which have flat memory buffers, will cause problems if the alignment of the former isn't as expected. This patch removes the casting between structs. Fixes: ae19955e7c86 ("i40evf: support reporting PF reset") Signed-off-by: Jingjing Wu --- drivers/net/i40e/i40e_ethdev_vf.c | 27 +++++++++++++++------------ 1 file changed, 15 insertions(+), 12 deletions(-) diff --git a/drivers/net/i40e/i40e_ethdev_vf.c b/drivers/net/i40e/i40e_ethdev_vf.c index aa306d6..53d7c87 100644 --- a/drivers/net/i40e/i40e_ethdev_vf.c +++ b/drivers/net/i40e/i40e_ethdev_vf.c @@ -1336,8 +1336,9 @@ i40evf_handle_aq_msg(struct rte_eth_dev *dev) struct i40e_hw *hw = I40E_DEV_PRIVATE_TO_HW(dev->data->dev_private); struct i40e_vf *vf = I40EVF_DEV_PRIVATE_TO_VF(dev->data->dev_private); struct i40e_arq_event_info info; - struct i40e_virtchnl_msg *v_msg; - uint16_t pending, opcode; + uint16_t pending, aq_opc; + enum i40e_virtchnl_ops msg_opc; + enum i40e_status_code msg_ret; int ret; info.buf_len = I40E_AQ_BUF_SZ; @@ -1346,7 +1347,6 @@ i40evf_handle_aq_msg(struct rte_eth_dev *dev) return; } info.msg_buf = vf->aq_resp; - v_msg = (struct i40e_virtchnl_msg *)&info.desc; pending = 1; while (pending) { @@ -1357,32 +1357,35 @@ i40evf_handle_aq_msg(struct rte_eth_dev *dev) "ret: %d", ret); break; } - opcode = rte_le_to_cpu_16(info.desc.opcode); - - switch (opcode) { + aq_opc = rte_le_to_cpu_16(info.desc.opcode); + msg_opc = (enum i40e_virtchnl_ops)rte_le_to_cpu_32( + info.desc.cookie_high); + msg_ret = (enum i40e_status_code)rte_le_to_cpu_32( + info.desc.cookie_low); + switch (aq_opc) { case i40e_aqc_opc_send_msg_to_vf: - if (v_msg->v_opcode == I40E_VIRTCHNL_OP_EVENT) + if (msg_opc == I40E_VIRTCHNL_OP_EVENT) /* process event*/ i40evf_handle_pf_event(dev, info.msg_buf, info.msg_len); else { /* read message and it's expected one */ - if (v_msg->v_opcode == vf->pend_cmd) { - vf->cmd_retval = v_msg->v_retval; + if (msg_opc == vf->pend_cmd) { + vf->cmd_retval = msg_ret; /* prevent compiler reordering */ rte_compiler_barrier(); _clear_cmd(vf); } else PMD_DRV_LOG(ERR, "command mismatch," "expect %u, get %u", - vf->pend_cmd, v_msg->v_opcode); + vf->pend_cmd, msg_ret); PMD_DRV_LOG(DEBUG, "adminq response is received," - " opcode = %d\n", v_msg->v_opcode); + " opcode = %d\n", msg_ret); } break; default: PMD_DRV_LOG(ERR, "Request %u is not supported yet", - opcode); + aq_opc); break; } }