From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from out3-smtp.messagingengine.com (out3-smtp.messagingengine.com [66.111.4.27]) by dpdk.org (Postfix) with ESMTP id 5D076DED; Wed, 31 Oct 2018 19:24:17 +0100 (CET) Received: from compute1.internal (compute1.nyi.internal [10.202.2.41]) by mailout.nyi.internal (Postfix) with ESMTP id E8B4D2220B; Wed, 31 Oct 2018 14:24:16 -0400 (EDT) Received: from mailfrontend2 ([10.202.2.163]) by compute1.internal (MEProxy); Wed, 31 Oct 2018 14:24:16 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=monjalon.net; h= from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding:content-type; s=mesmtp; bh=pT9TdGV/gFh9gxH8sk5H198dsOu0bB//XvQ0NbRjpcQ=; b=juCe6a2YxkRB k9IKjGwhaRbtSjcPiHzSb+AY2KabtPAZ8nfzSRVU44MDGwJFHKRsJMqj2+Xhep9o uOWTN9HIo2dEGo6AOM4uBkzu1rzeFTH3pOlBSJdLCMT6Wd0pqGkqMk60GuDSwt0g LRt8cTdO8GBO1LjCnRXEDeK0kA6r2CA= DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d= messagingengine.com; h=cc:content-transfer-encoding:content-type :date:from:in-reply-to:message-id:mime-version:references :subject:to:x-me-proxy:x-me-proxy:x-me-sender:x-me-sender :x-sasl-enc; s=fm1; bh=pT9TdGV/gFh9gxH8sk5H198dsOu0bB//XvQ0NbRjp cQ=; b=yi2eomxfNyx6KsxMhLAutw9gnNFDBP8Ckar2uudYPs2rhMh3H0DMY03X7 MV5dpSLAZemn/4hH3LYTOyrdZTvqfo+HUmDtnCry77P2FSI7prQnnFqQctJXDPqR YSHkPsOxfnDAro0AeTRjToajJhygWBGybCYVLLu2V+JXaLKrboVJTkF3p9ACkmPX DfTuZEn/skSrAd7vxJxZaz6zYcCFJOLsEy/JufoWrfiTxHrvjFXTCPgRXqKbLcRx 6mQLQUP9I5elEEvDqDva2SymC8ypNcLlH+pf6ubQdXlVt8e48Z2ZRbggGkzj8cJw 4P+PNzDdRmVBW8Di97CsythZ7wxPQ== X-ME-Sender: X-ME-Proxy: Received: from xps.localnet (184.203.134.77.rev.sfr.net [77.134.203.184]) by mail.messagingengine.com (Postfix) with ESMTPA id 0BEE9102EA; Wed, 31 Oct 2018 14:24:14 -0400 (EDT) From: Thomas Monjalon To: "Zhang, Qi Z" Cc: dev@dpdk.org, "Burakov, Anatoly" , "Yigit, Ferruh" , "geoffrey.lv@gmail.com" , "ajit.khaparde@broadcom.com" , "stable@dpdk.org" , "gaetan.rivet@6wind.com" , "arybchenko@solarflare.com" Date: Wed, 31 Oct 2018 19:24:21 +0100 Message-ID: <2723053.kYWEf3LriZ@xps> In-Reply-To: <039ED4275CED7440929022BC67E70611532DD668@SHSMSX103.ccr.corp.intel.com> References: <20181027032045.7564-1-qi.z.zhang@intel.com> <4370007.3MeJCCFLt4@xps> <039ED4275CED7440929022BC67E70611532DD668@SHSMSX103.ccr.corp.intel.com> MIME-Version: 1.0 Content-Transfer-Encoding: 7Bit Content-Type: text/plain; charset="us-ascii" Subject: Re: [dpdk-stable] [dpdk-dev] [PATCH v2] bus/pci: fix unexpected resource mapping override 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: , X-List-Received-Date: Wed, 31 Oct 2018 18:24:17 -0000 30/10/2018 16:19, Zhang, Qi Z: > From: Thomas Monjalon [mailto:thomas@monjalon.net] > > 27/10/2018 05:20, Qi Zhang: > > > When scanning an already plugged device, the virtual address of mapped > > > PCI resource in rte_pci_device will be overridden with 0, that may > > > cause driver does not work correctly. > > > The fix is not to update any rte_pci_device's field if the being > > > scanned device's driver is already probed. > > > > > > Bugzilla ID: 85 > > > Fixes: c752998b5e2e ("pci: introduce library and driver") > > > Cc: stable@dpdk.org > > > > > > Reported-by: Lv Geoffrey > > > Signed-off-by: Qi Zhang > > > > I still think something must be fixed in PCI scan. > > We are fixing something in PCI scan, right? Yes :) I was thinking about not scanning an already scanned device. If the device has been unplugged, it should be removed, and re-added when plugged, instead of trying to update it. I understand this is another kind of change and deserves more time to think about the right design. That's why I will accept the v3 of this patch. Anyway the road to get hotplug handled right is long :)