From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from dpdk.org (dpdk.org [92.243.14.124]) by inbox.dpdk.org (Postfix) with ESMTP id B6494A051C for ; Fri, 17 Jan 2020 18:58:21 +0100 (CET) Received: from [92.243.14.124] (localhost [127.0.0.1]) by dpdk.org (Postfix) with ESMTP id 827351B203; Fri, 17 Jan 2020 18:58:21 +0100 (CET) Received: from mga17.intel.com (mga17.intel.com [192.55.52.151]) by dpdk.org (Postfix) with ESMTP id 3DB131B203; Fri, 17 Jan 2020 18:58:19 +0100 (CET) X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from fmsmga003.fm.intel.com ([10.253.24.29]) by fmsmga107.fm.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 17 Jan 2020 09:58:18 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.70,331,1574150400"; d="scan'208";a="274454781" Received: from fyigit-mobl.ger.corp.intel.com (HELO [10.237.221.35]) ([10.237.221.35]) by FMSMGA003.fm.intel.com with ESMTP; 17 Jan 2020 09:58:16 -0800 To: Andrew Rybchenko , Fang TongHao , thomas@monjalon.net Cc: dev@dpdk.org, stable@dpdk.org, jia.guo@intel.com, cunming.liang@intel.com, qi.z.zhang@intel.com, jungle845943968@outlook.com, jerinj@marvell.com References: <20200113050312.1506-1-fangtonghao@sangfor.com.cn> <20200117020804.1290-1-fangtonghao@sangfor.com.cn> From: Ferruh Yigit Autocrypt: addr=ferruh.yigit@intel.com; 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charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 8bit Subject: Re: [dpdk-stable] [dpdk-dev] [PATCH v3] Fixes: ethdev: secondary process change shared memory X-BeenThere: stable@dpdk.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: patches for DPDK stable branches List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: stable-bounces@dpdk.org Sender: "stable" On 1/17/2020 8:33 AM, Andrew Rybchenko wrote: > On 1/17/20 5:08 AM, Fang TongHao wrote: > > Summary does not comply with [1]. > >> Fixes the secondary process changed shared memory >> in "rte_eth_copy_pci_info" function.In that function >> only primary can update the value of "eth_dev->data" >> which shared by primary and secondary. > > Consider: > Avoid overwriting device flags and other information in device > data stored in shared memory when a secondary process > probes PCI device. > > Fixes tag and CC to stable is required in accordance with [2]. > >> Signed-off-by: Fang TongHao > > [1] > https://doc.dpdk.org/guides/contributing/patches.html#commit-messages-subject-line > [2] > https://doc.dpdk.org/guides/contributing/patches.html#commit-messages-body > For sake of having the patch in -rc1, I have updated as suggested while merging, commit log become as following: ethdev: fix secondary process memory overwrite Avoid overwriting device flags and other information in device data stored in shared memory when a secondary process probes PCI device. Fixes: 494adb7f63f2 ("ethdev: add device fields from PCI layer") Cc: stable@dpdk.org Signed-off-by: Fang TongHao Reviewed-by: Andrew Rybchenko Reviewed-by: Ferruh Yigit And I have added a not the the function comment as following: * Copy pci device info to the Ethernet device data. + * Shared memory (eth_dev->data) only updated by primary process, so it is safe + * to call this function from both primary and secondary processes. * Applied to dpdk-next-net/master, thanks.