From patchwork Wed Sep 16 21:57:11 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Yinghai Lu X-Patchwork-Id: 7200771 Return-Path: X-Original-To: patchwork-linux-acpi@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork1.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork1.web.kernel.org (Postfix) with ESMTP id C04779F336 for ; Wed, 16 Sep 2015 22:10:43 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id CFADA20835 for ; Wed, 16 Sep 2015 22:10:42 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 6CC61205E9 for ; Wed, 16 Sep 2015 22:10:40 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753625AbbIPWDi (ORCPT ); Wed, 16 Sep 2015 18:03:38 -0400 Received: from aserp1040.oracle.com ([141.146.126.69]:26147 "EHLO aserp1040.oracle.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753814AbbIPWDd (ORCPT ); Wed, 16 Sep 2015 18:03:33 -0400 Received: from userv0022.oracle.com (userv0022.oracle.com [156.151.31.74]) by aserp1040.oracle.com (Sentrion-MTA-4.3.2/Sentrion-MTA-4.3.2) with ESMTP id t8GLwHdT005336 (version=TLSv1 cipher=DHE-RSA-AES256-SHA bits=256 verify=OK); Wed, 16 Sep 2015 21:58:18 GMT Received: from aserv0121.oracle.com (aserv0121.oracle.com [141.146.126.235]) by userv0022.oracle.com (8.13.8/8.13.8) with ESMTP id t8GLwHEl028676 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=FAIL); Wed, 16 Sep 2015 21:58:17 GMT Received: from abhmp0019.oracle.com (abhmp0019.oracle.com [141.146.116.25]) by aserv0121.oracle.com (8.13.8/8.13.8) with ESMTP id t8GLwHM2019782; Wed, 16 Sep 2015 21:58:17 GMT Received: from linux-siqj.site (/10.132.127.48) by default (Oracle Beehive Gateway v4.0) with ESMTP ; Wed, 16 Sep 2015 14:58:16 -0700 From: Yinghai Lu To: Bjorn Helgaas , David Miller , Benjamin Herrenschmidt , Wei Yang , TJ , Yijing Wang Cc: linux-pci@vger.kernel.org, linux-kernel@vger.kernel.org, Yinghai Lu , "Rafael J. Wysocki" , Len Brown , linux-acpi@vger.kernel.org Subject: [PATCH v5 13/53] PCI: Separate realloc list checking after allocation Date: Wed, 16 Sep 2015 14:57:11 -0700 Message-Id: <1442440671-5361-14-git-send-email-yinghai@kernel.org> X-Mailer: git-send-email 1.8.4.5 In-Reply-To: <1442440671-5361-1-git-send-email-yinghai@kernel.org> References: <1442440671-5361-1-git-send-email-yinghai@kernel.org> X-Source-IP: userv0022.oracle.com [156.151.31.74] Sender: linux-acpi-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-acpi@vger.kernel.org X-Spam-Status: No, score=-6.9 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, T_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 We check the realloc list, as list must be empty after allocation. Separate the realloc list checking to another function. Add checking that is missed in acpiphp driver. -v2: change to WARN_ON addording to Rafael. Signed-off-by: Yinghai Lu Cc: "Rafael J. Wysocki" Cc: Len Brown Cc: linux-acpi@vger.kernel.org --- drivers/pci/hotplug/acpiphp_glue.c | 1 + drivers/pci/pci.h | 1 + drivers/pci/setup-bus.c | 12 +++++++++--- 3 files changed, 11 insertions(+), 3 deletions(-) diff --git a/drivers/pci/hotplug/acpiphp_glue.c b/drivers/pci/hotplug/acpiphp_glue.c index ff53856..ce9fb21 100644 --- a/drivers/pci/hotplug/acpiphp_glue.c +++ b/drivers/pci/hotplug/acpiphp_glue.c @@ -507,6 +507,7 @@ static void enable_slot(struct acpiphp_slot *slot) } } __pci_bus_assign_resources(bus, &add_list, NULL); + pci_bus_check_realloc(&add_list); acpiphp_sanitize_bus(bus); pcie_bus_configure_settings(bus); diff --git a/drivers/pci/pci.h b/drivers/pci/pci.h index 24ba9dc..45a28c4 100644 --- a/drivers/pci/pci.h +++ b/drivers/pci/pci.h @@ -237,6 +237,7 @@ void __pci_bus_size_bridges(struct pci_bus *bus, void __pci_bus_assign_resources(const struct pci_bus *bus, struct list_head *realloc_head, struct list_head *fail_head); +void pci_bus_check_realloc(struct list_head *realloc_head); bool pci_bus_clip_resource(struct pci_dev *dev, int idx); void pci_reassigndev_resource_alignment(struct pci_dev *dev); diff --git a/drivers/pci/setup-bus.c b/drivers/pci/setup-bus.c index 9d7adab..c2482da 100644 --- a/drivers/pci/setup-bus.c +++ b/drivers/pci/setup-bus.c @@ -349,6 +349,12 @@ out: } } +void pci_bus_check_realloc(struct list_head *realloc_head) +{ + if (WARN_ON(!list_empty(realloc_head))) + free_list(realloc_head); +} + /** * assign_requested_resources_sorted() - satisfy resource requests * @@ -1860,7 +1866,7 @@ again: /* Depth last, allocate resources and update the hardware. */ __pci_bus_assign_resources(bus, add_list, &fail_head); if (add_list) - BUG_ON(!list_empty(add_list)); + pci_bus_check_realloc(add_list); tried_times++; /* any device complain? */ @@ -1935,7 +1941,7 @@ void pci_assign_unassigned_bridge_resources(struct pci_dev *bridge) again: __pci_bus_size_bridges(parent, &add_list); __pci_bridge_assign_resources(bridge, &add_list, &fail_head); - BUG_ON(!list_empty(&add_list)); + pci_bus_check_realloc(&add_list); tried_times++; if (list_empty(&fail_head)) @@ -1994,6 +2000,6 @@ void pci_assign_unassigned_bus_resources(struct pci_bus *bus) &add_list); up_read(&pci_bus_sem); __pci_bus_assign_resources(bus, &add_list, NULL); - BUG_ON(!list_empty(&add_list)); + pci_bus_check_realloc(&add_list); } EXPORT_SYMBOL_GPL(pci_assign_unassigned_bus_resources);