From patchwork Tue Jun 30 07:37:14 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Wei Yang X-Patchwork-Id: 6694371 X-Patchwork-Delegate: bhelgaas@google.com Return-Path: X-Original-To: patchwork-linux-pci@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork2.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork2.web.kernel.org (Postfix) with ESMTP id A2F3DC05AC for ; Tue, 30 Jun 2015 07:38:47 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id D0B5A20525 for ; Tue, 30 Jun 2015 07:38:46 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id EA52420520 for ; Tue, 30 Jun 2015 07:38:45 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751612AbbF3Hio (ORCPT ); Tue, 30 Jun 2015 03:38:44 -0400 Received: from e28smtp09.in.ibm.com ([122.248.162.9]:54624 "EHLO e28smtp09.in.ibm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750803AbbF3Hio (ORCPT ); Tue, 30 Jun 2015 03:38:44 -0400 Received: from /spool/local by e28smtp09.in.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted for from ; Tue, 30 Jun 2015 13:08:40 +0530 Received: from d28dlp02.in.ibm.com (9.184.220.127) by e28smtp09.in.ibm.com (192.168.1.139) with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted; Tue, 30 Jun 2015 13:08:38 +0530 X-Helo: d28dlp02.in.ibm.com X-MailFrom: weiyang@linux.vnet.ibm.com X-RcptTo: linux-pci@vger.kernel.org Received: from d28relay03.in.ibm.com (d28relay03.in.ibm.com [9.184.220.60]) by d28dlp02.in.ibm.com (Postfix) with ESMTP id 7CB5B394005A for ; Tue, 30 Jun 2015 13:08:37 +0530 (IST) Received: from d28av03.in.ibm.com (d28av03.in.ibm.com [9.184.220.65]) by d28relay03.in.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id t5U7cYfM56295650 for ; Tue, 30 Jun 2015 13:08:35 +0530 Received: from d28av03.in.ibm.com (localhost [127.0.0.1]) by d28av03.in.ibm.com (8.14.4/8.14.4/NCO v10.0 AVout) with ESMTP id t5U6WM6O002139 for ; Tue, 30 Jun 2015 12:02:23 +0530 Received: from localhost (richard.cn.ibm.com [9.186.166.22]) by d28av03.in.ibm.com (8.14.4/8.14.4/NCO v10.0 AVin) with ESMTP id t5U6WLVs002002; Tue, 30 Jun 2015 12:02:22 +0530 From: Wei Yang To: linux-pci@vger.kernel.org, bhelgaas@google.com Cc: Wei Yang Subject: [PATCH] PCI: Don't update VF's BAR Date: Tue, 30 Jun 2015 15:37:14 +0800 Message-Id: <1435649834-3148-1-git-send-email-weiyang@linux.vnet.ibm.com> X-Mailer: git-send-email 1.7.9.5 X-TM-AS-MML: disable X-Content-Scanned: Fidelis XPS MAILER x-cbid: 15063007-0033-0000-0000-00000684413D Sender: linux-pci-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org X-Spam-Status: No, score=-7.5 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP VF BARs are RO zero, so updating VF BARs will not take any effect. See the SR-IOV spec r1.1, sec 3.4.1.11. Signed-off-by: Wei Yang --- drivers/pci/setup-res.c | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/drivers/pci/setup-res.c b/drivers/pci/setup-res.c index 232f925..334b394 100644 --- a/drivers/pci/setup-res.c +++ b/drivers/pci/setup-res.c @@ -37,6 +37,13 @@ void pci_update_resource(struct pci_dev *dev, int resno) struct resource *res = dev->resource + resno; /* + * Per SRIOV SPEC 3.4.1.11, VF BARs are RO zero. + * If this is a VF, just return. + */ + if (dev->is_virtfn) + return; + + /* * Ignore resources for unimplemented BARs and unused resource slots * for 64 bit BARs. */