3.2.74-rc1 review patch. If anyone has any objections, please let me know.
------------------
From: Chen Yu <yu.c.chen@xxxxxxxxx>
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 <lv.zheng@xxxxxxxxx>
Signed-off-by: Chen Yu <yu.c.chen@xxxxxxxxx>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@xxxxxxxxx>
[bwh: Backported to 3.2: adjust context]
Signed-off-by: Ben Hutchings <ben@xxxxxxxxxxxxxxx>
---
drivers/acpi/osl.c | 9 ++++++---
include/linux/acpi.h | 6 ++++++
2 files changed, 12 insertions(+), 3 deletions(-)
--- a/drivers/acpi/osl.c
+++ b/drivers/acpi/osl.c
@@ -82,6 +82,7 @@ static struct workqueue_struct *kacpid_w
static struct workqueue_struct *kacpi_notify_wq;
struct workqueue_struct *kacpi_hotplug_wq;
EXPORT_SYMBOL(kacpi_hotplug_wq);
+unsigned int acpi_sci_irq = INVALID_ACPI_IRQ;
struct acpi_res_list {
resource_size_t start;
@@ -566,17 +567,19 @@ acpi_os_install_interrupt_handler(u32 gs
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;
}
--- a/include/linux/acpi.h
+++ b/include/linux/acpi.h
@@ -110,6 +110,12 @@ int acpi_unregister_ioapic(acpi_handle h
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;
--
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