From patchwork Tue Jul 23 11:10:55 2013 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Gavin Shan X-Patchwork-Id: 261052 Return-Path: X-Original-To: patchwork-incoming@ozlabs.org Delivered-To: patchwork-incoming@ozlabs.org Received: from ozlabs.org (localhost [IPv6:::1]) by ozlabs.org (Postfix) with ESMTP id EF7192C04E2 for ; Tue, 23 Jul 2013 21:18:13 +1000 (EST) Received: from e37.co.us.ibm.com (e37.co.us.ibm.com [32.97.110.158]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (Client CN "e37.co.us.ibm.com", Issuer "GeoTrust SSL CA" (not verified)) by ozlabs.org (Postfix) with ESMTPS id C21772C041C for ; Tue, 23 Jul 2013 21:13:00 +1000 (EST) Received: from /spool/local by e37.co.us.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted for from ; Tue, 23 Jul 2013 05:12:58 -0600 Received: from d03dlp01.boulder.ibm.com (9.17.202.177) by e37.co.us.ibm.com (192.168.1.137) with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted; Tue, 23 Jul 2013 05:11:08 -0600 Received: from d03relay03.boulder.ibm.com (d03relay03.boulder.ibm.com [9.17.195.228]) by d03dlp01.boulder.ibm.com (Postfix) with ESMTP id 19E6B1FF001F for ; Tue, 23 Jul 2013 05:05:46 -0600 (MDT) Received: from d03av04.boulder.ibm.com (d03av04.boulder.ibm.com [9.17.195.170]) by d03relay03.boulder.ibm.com (8.13.8/8.13.8/NCO v10.0) with ESMTP id r6NBB7YB164298 for ; Tue, 23 Jul 2013 05:11:07 -0600 Received: from d03av04.boulder.ibm.com (loopback [127.0.0.1]) by d03av04.boulder.ibm.com (8.14.4/8.13.1/NCO v10.0 AVout) with ESMTP id r6NBB6rD023802 for ; Tue, 23 Jul 2013 05:11:07 -0600 Received: from shangw (shangw.cn.ibm.com [9.125.213.109]) by d03av04.boulder.ibm.com (8.14.4/8.13.1/NCO v10.0 AVin) with SMTP id r6NBB2X0023545; Tue, 23 Jul 2013 05:11:05 -0600 Received: by shangw (Postfix, from userid 1000) id BF9E1303F30; Tue, 23 Jul 2013 19:11:04 +0800 (CST) From: Gavin Shan To: linuxppc-dev@lists.ozlabs.org Subject: [PATCH 10/11] powerpc/eeh: Fix unbalanced enable for IRQ Date: Tue, 23 Jul 2013 19:10:55 +0800 Message-Id: <1374577856-1712-11-git-send-email-shangw@linux.vnet.ibm.com> X-Mailer: git-send-email 1.7.5.4 In-Reply-To: <1374577856-1712-1-git-send-email-shangw@linux.vnet.ibm.com> References: <1374577856-1712-1-git-send-email-shangw@linux.vnet.ibm.com> X-TM-AS-MML: No X-Content-Scanned: Fidelis XPS MAILER x-cbid: 13072311-7408-0000-0000-0000123F7760 Cc: Gavin Shan X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Errors-To: linuxppc-dev-bounces+patchwork-incoming=ozlabs.org@lists.ozlabs.org Sender: "Linuxppc-dev" The patch fixes following issue: Unbalanced enable for IRQ 23 ------------[ cut here ]------------ WARNING: at kernel/irq/manage.c:437 : NIP [c00000000016de8c] .__enable_irq+0x11c/0x140 LR [c00000000016de88] .__enable_irq+0x118/0x140 Call Trace: [c000003ea1f23880] [c00000000016de88] .__enable_irq+0x118/0x140 (unreliable) [c000003ea1f23910] [c00000000016df08] .enable_irq+0x58/0xa0 [c000003ea1f239a0] [c0000000000388b4] .eeh_enable_irq+0xc4/0xe0 [c000003ea1f23a30] [c000000000038a28] .eeh_report_reset+0x78/0x130 [c000003ea1f23ac0] [c000000000037508] .eeh_pe_dev_traverse+0x98/0x170 [c000003ea1f23b60] [c0000000000391ac] .eeh_handle_normal_event+0x2fc/0x3d0 [c000003ea1f23bf0] [c000000000039538] .eeh_handle_event+0x2b8/0x2c0 [c000003ea1f23c90] [c000000000039600] .eeh_event_handler+0xc0/0x170 [c000003ea1f23d30] [c0000000000da9a0] .kthread+0xf0/0x100 [c000003ea1f23e30] [c00000000000a1dc] .ret_from_kernel_thread+0x5c/0x80 Signed-off-by: Gavin Shan --- arch/powerpc/kernel/eeh_driver.c | 6 +++++- 1 files changed, 5 insertions(+), 1 deletions(-) diff --git a/arch/powerpc/kernel/eeh_driver.c b/arch/powerpc/kernel/eeh_driver.c index 9fda75d..36bed5a 100644 --- a/arch/powerpc/kernel/eeh_driver.c +++ b/arch/powerpc/kernel/eeh_driver.c @@ -143,10 +143,14 @@ static void eeh_disable_irq(struct pci_dev *dev) static void eeh_enable_irq(struct pci_dev *dev) { struct eeh_dev *edev = pci_dev_to_eeh_dev(dev); + struct irq_desc *desc; if ((edev->mode) & EEH_DEV_IRQ_DISABLED) { edev->mode &= ~EEH_DEV_IRQ_DISABLED; - enable_irq(dev->irq); + + desc = irq_to_desc(dev->irq); + if (desc && desc->depth > 0) + enable_irq(dev->irq); } }