From patchwork Fri Jan 3 00:05:35 2014 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Yinghai Lu X-Patchwork-Id: 3427961 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 [198.145.19.201]) by patchwork1.web.kernel.org (Postfix) with ESMTP id 6780C9F384 for ; Fri, 3 Jan 2014 00:06:04 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id ACDF620158 for ; Fri, 3 Jan 2014 00:06:03 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id DA42920163 for ; Fri, 3 Jan 2014 00:06:02 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753023AbaACAGA (ORCPT ); Thu, 2 Jan 2014 19:06:00 -0500 Received: from aserp1040.oracle.com ([141.146.126.69]:21425 "EHLO aserp1040.oracle.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752862AbaACAF4 (ORCPT ); Thu, 2 Jan 2014 19:05:56 -0500 Received: from ucsinet21.oracle.com (ucsinet21.oracle.com [156.151.31.93]) by aserp1040.oracle.com (Sentrion-MTA-4.3.1/Sentrion-MTA-4.3.1) with ESMTP id s0305UQb010284 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=OK); Fri, 3 Jan 2014 00:05:31 GMT Received: from aserz7021.oracle.com (aserz7021.oracle.com [141.146.126.230]) by ucsinet21.oracle.com (8.14.4+Sun/8.14.4) with ESMTP id s0305TdU004122 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO); Fri, 3 Jan 2014 00:05:30 GMT Received: from abhmp0006.oracle.com (abhmp0006.oracle.com [141.146.116.12]) by aserz7021.oracle.com (8.14.4+Sun/8.14.4) with ESMTP id s0305SV4018327; Fri, 3 Jan 2014 00:05:29 GMT Received: from linux-siqj.site (/10.132.126.191) by default (Oracle Beehive Gateway v4.0) with ESMTP ; Thu, 02 Jan 2014 16:05:28 -0800 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 v5 03/33] genirq: Do not free unallocated irq descriptors Date: Thu, 2 Jan 2014 16:05:35 -0800 Message-Id: <1388707565-16535-4-git-send-email-yinghai@kernel.org> X-Mailer: git-send-email 1.8.4 In-Reply-To: <1388707565-16535-1-git-send-email-yinghai@kernel.org> References: <1388707565-16535-1-git-send-email-yinghai@kernel.org> X-Source-IP: ucsinet21.oracle.com [156.151.31.93] Sender: linux-acpi-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-acpi@vger.kernel.org X-Spam-Status: No, score=-7.4 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);