From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932271AbWGRPMj (ORCPT ); Tue, 18 Jul 2006 11:12:39 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S932270AbWGRPMj (ORCPT ); Tue, 18 Jul 2006 11:12:39 -0400 Received: from mtagate3.uk.ibm.com ([195.212.29.136]:46584 "EHLO mtagate3.uk.ibm.com") by vger.kernel.org with ESMTP id S932271AbWGRPMh (ORCPT ); Tue, 18 Jul 2006 11:12:37 -0400 Content-Type: text/plain; charset="us-ascii" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Subject: [PATCH 1 of 2] x86_64: Calgary IOMMU - fix off by one error X-Mercurial-Node: 81635ec2e677165285c2a483958899217f9631d8 Message-Id: <81635ec2e677165285c2.1153235477@rhun.haifa.ibm.com> In-Reply-To: Date: Tue, 18 Jul 2006 18:11:17 +0300 From: Muli Ben-Yehuda To: ak@suse.de Cc: jdmason@us.ibm.com, discuss@x86-64.org, linux-kernel@vger.kernel.org, konradr@redhat.com Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org # HG changeset patch # User Muli Ben-Yehuda # Date 1153234988 -10800 # Node ID 81635ec2e677165285c2a483958899217f9631d8 # Parent 1b8d63e34819bac5b6aac0048ef79004fb243db9 x86_64: Calgary IOMMU - fix off by one error Fixed off-by-one error in detect_calgary and calgary_init which will cause arrays to overflow. Also, removed impossible to hit BUG_ON. Signed-Off-By: Jon Mason Signed-Off-By: Muli Ben-Yehuda diff -r 1b8d63e34819 -r 81635ec2e677 arch/x86_64/kernel/pci-calgary.c --- a/arch/x86_64/kernel/pci-calgary.c Sat Jul 15 22:03:19 2006 +0000 +++ b/arch/x86_64/kernel/pci-calgary.c Tue Jul 18 18:03:08 2006 +0300 @@ -812,7 +812,7 @@ static int __init calgary_init(void) int i, ret = -ENODEV; struct pci_dev *dev = NULL; - for (i = 0; i <= num_online_nodes() * MAX_NUM_OF_PHBS; i++) { + for (i = 0; i < num_online_nodes() * MAX_NUM_OF_PHBS; i++) { dev = pci_get_device(PCI_VENDOR_ID_IBM, PCI_DEVICE_ID_IBM_CALGARY, dev); @@ -890,9 +890,8 @@ void __init detect_calgary(void) specified_table_size = determine_tce_table_size(end_pfn * PAGE_SIZE); for (bus = 0, table_idx = 0; - bus <= num_online_nodes() * MAX_PHB_BUS_NUM; + bus < num_online_nodes() * MAX_PHB_BUS_NUM; bus++) { - BUG_ON(bus > MAX_NUMNODES * MAX_PHB_BUS_NUM); if (read_pci_config(bus, 0, 0, 0) != PCI_VENDOR_DEVICE_ID_CALGARY) continue; if (test_bit(bus, translation_disabled)) { @@ -1002,7 +1001,7 @@ static int __init calgary_parse_options( if (p == endp) break; - if (bridge <= (num_online_nodes() * MAX_PHB_BUS_NUM)) { + if (bridge < (num_online_nodes() * MAX_PHB_BUS_NUM)) { printk(KERN_INFO "Calgary: disabling " "translation for PHB 0x%x\n", bridge); set_bit(bridge, translation_disabled);