Currently when system is trying to uninstall the acpi irq
handler, it uses the acpi_gbl_FADT.sci_interrupt directly.
But acpi irq handler is actually installed by mapped irq
in acpi_os_install_interrupt_handler, so this patch fixes
this problem by using the mapped irq returned from acpi_gsi_to_irq.
Cc: <stable@xxxxxxxxxxxxxxx> # 2.6.39
Acked-by: Lv Zheng <lv.zheng@xxxxxxxxx>
Signed-off-by: Chen Yu <yu.c.chen@xxxxxxxxx>
---
drivers/acpi/osl.c | 10 +++++++---
include/linux/acpi.h | 6 ++++++
2 files changed, 13 insertions(+), 3 deletions(-)
diff --git a/drivers/acpi/osl.c b/drivers/acpi/osl.c
index 739a4a6..64df9d4 100644
--- a/drivers/acpi/osl.c
+++ b/drivers/acpi/osl.c
@@ -81,6 +81,7 @@ static struct workqueue_struct *kacpid_wq;
static struct workqueue_struct *kacpi_notify_wq;
static struct workqueue_struct *kacpi_hotplug_wq;
static bool acpi_os_initialized;
+unsigned int acpi_sci_irq = INVALID_ACPI_IRQ;
/*
* This list of permanent mappings is for memory that may be accessed from
@@ -856,17 +857,20 @@ 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 43856d1..1ae6ba0 100644
--- a/include/linux/acpi.h
+++ b/include/linux/acpi.h
@@ -193,6 +193,12 @@ int acpi_ioapic_registered(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;
--
1.8.4.2
--
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