From patchwork Tue Jun 10 06:16:27 2014 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jiang Liu X-Patchwork-Id: 357733 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by ozlabs.org (Postfix) with ESMTP id 7D5BF1400A8 for ; Tue, 10 Jun 2014 16:13:22 +1000 (EST) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754660AbaFJGNV (ORCPT ); Tue, 10 Jun 2014 02:13:21 -0400 Received: from mga09.intel.com ([134.134.136.24]:64455 "EHLO mga09.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754584AbaFJGNU (ORCPT ); Tue, 10 Jun 2014 02:13:20 -0400 Received: from orsmga001.jf.intel.com ([10.7.209.18]) by orsmga102.jf.intel.com with ESMTP; 09 Jun 2014 23:08:02 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="4.98,1007,1392192000"; d="scan'208";a="526031018" Received: from gerry-dev.bj.intel.com ([10.238.158.74]) by orsmga001.jf.intel.com with ESMTP; 09 Jun 2014 23:13:13 -0700 From: Jiang Liu To: Benjamin Herrenschmidt , Thomas Gleixner , Grant Likely , Ingo Molnar , "H. Peter Anvin" , "Rafael J. Wysocki" , Bjorn Helgaas , Randy Dunlap , Yinghai Lu , Len Brown , Pavel Machek , x86@kernel.org Cc: Jiang Liu , Konrad Rzeszutek Wilk , Andrew Morton , Tony Luck , Joerg Roedel , Paul Gortmaker , Greg Kroah-Hartman , linux-kernel@vger.kernel.org, linux-pci@vger.kernel.org, linux-acpi@vger.kernel.org, linux-pm@vger.kernel.org Subject: [Patch V4 38/42] x86, irq, ACPI: release IOAPIC pin when PCI device is disabled Date: Tue, 10 Jun 2014 14:16:27 +0800 Message-Id: <1402380987-32577-1-git-send-email-jiang.liu@linux.intel.com> X-Mailer: git-send-email 1.7.10.4 In-Reply-To: <1402302011-23642-39-git-send-email-jiang.liu@linux.intel.com> References: <1402302011-23642-39-git-send-email-jiang.liu@linux.intel.com> Sender: linux-pci-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org Release IOAPIC pin associated with PCI device when the PCI device is disabled. Signed-off-by: Jiang Liu --- Minor change, simplify usage of function pointer. --- arch/x86/kernel/acpi/boot.c | 27 +++++++++++++++++++++++++++ drivers/acpi/pci_irq.c | 3 ++- 2 files changed, 29 insertions(+), 1 deletion(-) diff --git a/arch/x86/kernel/acpi/boot.c b/arch/x86/kernel/acpi/boot.c index fd4b6d2e436c..8c28023924bf 100644 --- a/arch/x86/kernel/acpi/boot.c +++ b/arch/x86/kernel/acpi/boot.c @@ -421,8 +421,24 @@ static int mp_register_gsi(struct device *dev, u32 gsi, int trigger, return irq; } +static void mp_unregister_gsi(u32 gsi) +{ + int irq; + + if (acpi_irq_model != ACPI_IRQ_MODEL_IOAPIC) + return; + + if (acpi_gbl_FADT.sci_interrupt == gsi) + return; + + irq = mp_map_gsi_to_irq(gsi, 0); + if (irq > 0) + mp_unmap_irq(irq); +} + static struct irq_domain_ops acpi_irqdomain_ops = { .map = mp_irqdomain_map, + .unmap = mp_irqdomain_unmap, }; static int __init @@ -640,8 +656,16 @@ static int acpi_register_gsi_ioapic(struct device *dev, u32 gsi, return irq; } +static void acpi_unregister_gsi_ioapic(u32 gsi) +{ +#ifdef CONFIG_X86_IO_APIC + mp_unregister_gsi(gsi); +#endif +} + int (*__acpi_register_gsi)(struct device *dev, u32 gsi, int trigger, int polarity) = acpi_register_gsi_pic; +void (*__acpi_unregister_gsi)(u32 gsi) = NULL; #ifdef CONFIG_ACPI_SLEEP int (*acpi_suspend_lowlevel)(void) = x86_acpi_suspend_lowlevel; @@ -661,6 +685,8 @@ EXPORT_SYMBOL_GPL(acpi_register_gsi); void acpi_unregister_gsi(u32 gsi) { + if (__acpi_unregister_gsi) + __acpi_unregister_gsi(gsi); } EXPORT_SYMBOL_GPL(acpi_unregister_gsi); @@ -668,6 +694,7 @@ static void __init acpi_set_irq_model_ioapic(void) { acpi_irq_model = ACPI_IRQ_MODEL_IOAPIC; __acpi_register_gsi = acpi_register_gsi_ioapic; + __acpi_unregister_gsi = acpi_unregister_gsi_ioapic; acpi_ioapic = 1; } diff --git a/drivers/acpi/pci_irq.c b/drivers/acpi/pci_irq.c index 9c62340c2360..6ba463ceccc6 100644 --- a/drivers/acpi/pci_irq.c +++ b/drivers/acpi/pci_irq.c @@ -498,5 +498,6 @@ void acpi_pci_irq_disable(struct pci_dev *dev) */ dev_dbg(&dev->dev, "PCI INT %c disabled\n", pin_name(pin)); - acpi_unregister_gsi(gsi); + if (gsi >= 0 && dev->irq > 0) + acpi_unregister_gsi(gsi); }