From patchwork Mon Aug 5 08:54:57 2013 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Yijing Wang X-Patchwork-Id: 2838593 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 [198.145.19.201]) by patchwork2.web.kernel.org (Postfix) with ESMTP id CF1D6BF535 for ; Mon, 5 Aug 2013 08:55:35 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 8F046201F6 for ; Mon, 5 Aug 2013 08:55:34 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id C0B51201EB for ; Mon, 5 Aug 2013 08:55:32 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755349Ab3HEIz2 (ORCPT ); Mon, 5 Aug 2013 04:55:28 -0400 Received: from szxga02-in.huawei.com ([119.145.14.65]:60822 "EHLO szxga02-in.huawei.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755369Ab3HEIzY (ORCPT ); Mon, 5 Aug 2013 04:55:24 -0400 Received: from 172.24.2.119 (EHLO szxeml213-edg.china.huawei.com) ([172.24.2.119]) by szxrg02-dlp.huawei.com (MOS 4.3.4-GA FastPath queued) with ESMTP id BFN83301; Mon, 05 Aug 2013 16:55:23 +0800 (CST) Received: from SZXEML412-HUB.china.huawei.com (10.82.67.91) by szxeml213-edg.china.huawei.com (172.24.2.30) with Microsoft SMTP Server (TLS) id 14.1.323.7; Mon, 5 Aug 2013 16:55:21 +0800 Received: from localhost (10.135.76.69) by szxeml412-hub.china.huawei.com (10.82.67.91) with Microsoft SMTP Server id 14.1.323.7; Mon, 5 Aug 2013 16:55:15 +0800 From: Yijing Wang To: Bjorn Helgaas CC: , Rafael , Oliver Neukum , Gu Zheng , Paul Bolle , Hanjun Guo , , Yijing Wang Subject: [PATCH -v5 5/6] PCI: add inspection of device change in pci_scan_single_device Date: Mon, 5 Aug 2013 16:54:57 +0800 Message-ID: <1375692898-27476-6-git-send-email-wangyijing@huawei.com> X-Mailer: git-send-email 1.7.11.msysgit.1 In-Reply-To: <1375692898-27476-1-git-send-email-wangyijing@huawei.com> References: <1375692898-27476-1-git-send-email-wangyijing@huawei.com> MIME-Version: 1.0 X-Originating-IP: [10.135.76.69] X-CFilter-Loop: Reflected Sender: linux-pci-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org X-Spam-Status: No, score=-6.9 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 Add inspection of device change in pci_scan_single_device. If device change found, print warning. Because the new device bind the old device driver, so for safety, we do not remove this device. Signed-off-by: Yijing Wang Cc: Paul Bolle Cc: "Rafael J. Wysocki" Cc: Oliver Neukum Cc: Gu Zheng Cc: linux-pci@vger.kernel.org --- drivers/pci/probe.c | 2 ++ 1 files changed, 2 insertions(+), 0 deletions(-) diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c index 0c5da76..f2812db 100644 --- a/drivers/pci/probe.c +++ b/drivers/pci/probe.c @@ -1389,6 +1389,8 @@ struct pci_dev *__ref pci_scan_single_device(struct pci_bus *bus, int devfn) dev = pci_get_slot(bus, devfn); if (dev) { + if (pci_serial_number_changed(dev)) + dev_warn(&dev->dev, "device serial number changed!"); pci_dev_put(dev); return dev; }