From patchwork Mon Jan 4 03:04:43 2010 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Yinghai Lu X-Patchwork-Id: 70591 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by demeter.kernel.org (8.14.3/8.14.2) with ESMTP id o043Fe3A014427 for ; Mon, 4 Jan 2010 03:15:41 GMT Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752934Ab0ADDNk (ORCPT ); Sun, 3 Jan 2010 22:13:40 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1753318Ab0ADDNj (ORCPT ); Sun, 3 Jan 2010 22:13:39 -0500 Received: from sca-es-mail-2.Sun.COM ([192.18.43.133]:56424 "EHLO sca-es-mail-2.sun.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752917Ab0ADDHR (ORCPT ); Sun, 3 Jan 2010 22:07:17 -0500 Received: from fe-sfbay-10.sun.com ([192.18.43.129]) by sca-es-mail-2.sun.com (8.13.7+Sun/8.12.9) with ESMTP id o0437DOx004947; Sun, 3 Jan 2010 19:07:14 -0800 (PST) MIME-version: 1.0 Content-transfer-encoding: 7BIT Content-type: TEXT/PLAIN Received: from conversion-daemon.fe-sfbay-10.sun.com by fe-sfbay-10.sun.com (Sun Java(tm) System Messaging Server 7u2-7.04 64bit (built Jul 2 2009)) id <0KVP00500CK5PO00@fe-sfbay-10.sun.com>; Sun, 03 Jan 2010 19:07:13 -0800 (PST) Received: from localhost.localdomain ([unknown] [75.55.223.240]) by fe-sfbay-10.sun.com (Sun Java(tm) System Messaging Server 7u2-7.04 64bit (built Jul 2 2009)) with ESMTPSA id <0KVP00DJECNOX4E0@fe-sfbay-10.sun.com>; Sun, 03 Jan 2010 19:07:13 -0800 (PST) Date: Sun, 03 Jan 2010 19:04:43 -0800 From: Yinghai Lu Subject: [PATCH 05/29] x86: check range in update range In-reply-to: <1262574307-17040-1-git-send-email-yinghai@kernel.org> To: Ingo Molnar , Thomas Gleixner , "H. Peter Anvin" , Andrew Morton , Jesse Barnes , Christoph Lameter Cc: linux-kernel@vger.kernel.org, linux-pci@vger.kernel.org, Yinghai Lu Message-id: <1262574307-17040-6-git-send-email-yinghai@kernel.org> X-Mailer: git-send-email 1.6.4.2 References: <1262574307-17040-1-git-send-email-yinghai@kernel.org> Sender: linux-pci-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org diff --git a/kernel/range.c b/kernel/range.c index 46a10c8..71e0021 100644 --- a/kernel/range.c +++ b/kernel/range.c @@ -13,6 +13,9 @@ int add_range(struct range *range, int az, int nr_range, u64 start, u64 end) { + if (start > end) + return nr_range; + /* Out of slots: */ if (nr_range >= az) return nr_range; @@ -30,6 +33,9 @@ int add_range_with_merge(struct range *range, int az, int nr_range, { int i; + if (start > end) + return nr_range; + /* Try to merge it with old one: */ for (i = 0; i < nr_range; i++) { u64 final_start, final_end; @@ -59,6 +65,9 @@ void subtract_range(struct range *range, int az, u64 start, u64 end) { int i, j; + if (start > end) + return; + for (j = 0; j < az; j++) { if (!range[j].end) continue;