From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754305AbbLIJjo (ORCPT ); Wed, 9 Dec 2015 04:39:44 -0500 Received: from youngberry.canonical.com ([91.189.89.112]:45138 "EHLO youngberry.canonical.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754240AbbLIJjh (ORCPT ); Wed, 9 Dec 2015 04:39:37 -0500 From: Luis Henriques To: linux-kernel@vger.kernel.org, stable@vger.kernel.org, kernel-team@lists.ubuntu.com Cc: Chen Yu , "Rafael J. Wysocki" , Luis Henriques Subject: [PATCH 3.16.y-ckt 041/126] ACPI: Use correct IRQ when uninstalling ACPI interrupt handler Date: Wed, 9 Dec 2015 09:36:51 +0000 Message-Id: <1449653896-5236-42-git-send-email-luis.henriques@canonical.com> In-Reply-To: <1449653896-5236-1-git-send-email-luis.henriques@canonical.com> References: <1449653896-5236-1-git-send-email-luis.henriques@canonical.com> X-Extended-Stable: 3.16 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 3.16.7-ckt21 -stable review patch. If anyone has any objections, please let me know. ------------------ From: Chen Yu commit 49e4b84333f338d4f183f28f1f3c1131b9fb2b5a upstream. Currently when the system is trying to uninstall the ACPI interrupt handler, it uses acpi_gbl_FADT.sci_interrupt as the IRQ number. However, the IRQ number that the ACPI interrupt handled is installed for comes from acpi_gsi_to_irq() and that is the number that should be used for the handler removal. Fix this problem by using the mapped IRQ returned from acpi_gsi_to_irq() as appropriate. Acked-by: Lv Zheng Signed-off-by: Chen Yu Signed-off-by: Rafael J. Wysocki [ luis: backported to 3.16: adjusted context ] Signed-off-by: Luis Henriques --- drivers/acpi/osl.c | 9 ++++++--- include/linux/acpi.h | 6 ++++++ 2 files changed, 12 insertions(+), 3 deletions(-) diff --git a/drivers/acpi/osl.c b/drivers/acpi/osl.c index 5e240a479b71..9fb0e4fd6ac0 100644 --- a/drivers/acpi/osl.c +++ b/drivers/acpi/osl.c @@ -83,6 +83,7 @@ static void *acpi_irq_context; static struct workqueue_struct *kacpid_wq; static struct workqueue_struct *kacpi_notify_wq; static struct workqueue_struct *kacpi_hotplug_wq; +unsigned int acpi_sci_irq = INVALID_ACPI_IRQ; /* * This list of permanent mappings is for memory that may be accessed from @@ -828,17 +829,19 @@ acpi_os_install_interrupt_handler(u32 gsi, acpi_osd_handler handler, acpi_irq_handler = NULL; return AE_NOT_ACQUIRED; } + acpi_sci_irq = irq; return AE_OK; } -acpi_status acpi_os_remove_interrupt_handler(u32 irq, acpi_osd_handler handler) +acpi_status acpi_os_remove_interrupt_handler(u32 gsi, acpi_osd_handler handler) { - if (irq != acpi_gbl_FADT.sci_interrupt) + if (gsi != acpi_gbl_FADT.sci_interrupt || !acpi_sci_irq_valid()) return AE_BAD_PARAMETER; - free_irq(irq, acpi_irq); + free_irq(acpi_sci_irq, acpi_irq); acpi_irq_handler = NULL; + acpi_sci_irq = INVALID_ACPI_IRQ; return AE_OK; } diff --git a/include/linux/acpi.h b/include/linux/acpi.h index 3b18cb3d5307..7e52e670d6ad 100644 --- a/include/linux/acpi.h +++ b/include/linux/acpi.h @@ -151,6 +151,12 @@ int acpi_unregister_ioapic(acpi_handle handle, u32 gsi_base); void acpi_irq_stats_init(void); extern u32 acpi_irq_handled; extern u32 acpi_irq_not_handled; +extern unsigned int acpi_sci_irq; +#define INVALID_ACPI_IRQ ((unsigned)-1) +static inline bool acpi_sci_irq_valid(void) +{ + return acpi_sci_irq != INVALID_ACPI_IRQ; +} extern int sbf_port; extern unsigned long acpi_realmode_flags;