From patchwork Sun Aug 11 02:45:13 2013 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Yinghai Lu X-Patchwork-Id: 2842558 X-Patchwork-Delegate: bhelgaas@google.com Return-Path: X-Original-To: patchwork-linux-pci@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork1.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.19.201]) by patchwork1.web.kernel.org (Postfix) with ESMTP id 6B4189F271 for ; Sun, 11 Aug 2013 02:46:51 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 673192020A for ; Sun, 11 Aug 2013 02:46:50 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 060AF20203 for ; Sun, 11 Aug 2013 02:46:49 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751876Ab3HKCqM (ORCPT ); Sat, 10 Aug 2013 22:46:12 -0400 Received: from userp1040.oracle.com ([156.151.31.81]:25516 "EHLO userp1040.oracle.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751778Ab3HKCqJ (ORCPT ); Sat, 10 Aug 2013 22:46:09 -0400 Received: from ucsinet22.oracle.com (ucsinet22.oracle.com [156.151.31.94]) by userp1040.oracle.com (Sentrion-MTA-4.3.1/Sentrion-MTA-4.3.1) with ESMTP id r7B2jY4e019994 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=OK); Sun, 11 Aug 2013 02:45:34 GMT Received: from aserz7022.oracle.com (aserz7022.oracle.com [141.146.126.231]) by ucsinet22.oracle.com (8.14.4+Sun/8.14.4) with ESMTP id r7B2jVNL008381 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO); Sun, 11 Aug 2013 02:45:32 GMT Received: from abhmt103.oracle.com (abhmt103.oracle.com [141.146.116.55]) by aserz7022.oracle.com (8.14.4+Sun/8.14.4) with ESMTP id r7B2jVDS023007; Sun, 11 Aug 2013 02:45:31 GMT Received: from linux-siqj.site.site (/75.36.254.102) by default (Oracle Beehive Gateway v4.0) with ESMTP ; Sat, 10 Aug 2013 19:45:30 -0700 From: Yinghai Lu To: Thomas Gleixner , Ingo Molnar , "H. Peter Anvin" , Tony Luck , Bjorn Helgaas , "Rafael J. Wysocki" Cc: linux-pci@vger.kernel.org, linux-kernel@vger.kernel.org, linux-acpi@vger.kernel.org, Yinghai Lu Subject: [PATCH 03/28] genirq: Do not free unallocated irq descriptors Date: Sat, 10 Aug 2013 19:45:13 -0700 Message-Id: <1376189139-31856-4-git-send-email-yinghai@kernel.org> X-Mailer: git-send-email 1.8.1.4 In-Reply-To: <1376189139-31856-1-git-send-email-yinghai@kernel.org> References: <1376189139-31856-1-git-send-email-yinghai@kernel.org> X-Source-IP: ucsinet22.oracle.com [156.151.31.94] 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 Hot-added interrupt controllers can reserve a range of interrupt numbers, but only allocate some of them. To simplify the release on hot-remove allow them to iterate over the reserved range, let the free_desc() code return early when the descriptor does not exist -v2: changelog from tglx Signed-off-by: Yinghai Lu --- kernel/irq/irqdesc.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/kernel/irq/irqdesc.c b/kernel/irq/irqdesc.c index 1166545..bbf0601 100644 --- a/kernel/irq/irqdesc.c +++ b/kernel/irq/irqdesc.c @@ -165,6 +165,9 @@ static void free_desc(unsigned int irq) { struct irq_desc *desc = irq_to_desc(irq); + if (!desc) + return; + unregister_irq_proc(irq, desc); mutex_lock(&sparse_irq_lock);