Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752758Ab3HKCsi (ORCPT ); Sat, 10 Aug 2013 22:48:38 -0400 Received: from aserp1040.oracle.com ([141.146.126.69]:34715 "EHLO aserp1040.oracle.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751956Ab3HKCsf (ORCPT ); Sat, 10 Aug 2013 22:48:35 -0400 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 v4 03/28] genirq: Do not free unallocated irq descriptors Date: Sat, 10 Aug 2013 19:47:49 -0700 Message-Id: <1376189294-32022-4-git-send-email-yinghai@kernel.org> X-Mailer: git-send-email 1.8.1.4 In-Reply-To: <1376189294-32022-1-git-send-email-yinghai@kernel.org> References: <1376189294-32022-1-git-send-email-yinghai@kernel.org> X-Source-IP: acsinet21.oracle.com [141.146.126.237] Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1008 Lines: 34 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); -- 1.8.1.4 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/