For ACPI compatible system, SCI(ACPI System Control
Interrupt) is used to wake the system up from suspend-to-idle.
Once the CPU is woken up by SCI, the interrupt handler will
firstly check if the current interrupt is legal to wake up
the whole system, thus irq_pm_check_wakeup is invoked
to validate the irq number. However, before suspend-to-idle,
acpi_gbl_FADT.sci_interrupt is marked rather than actual
irq number in acpi_freeze_prepare, this might lead to unable
to wake up the system.
This patch fixes this problem by marking the irq number
returned by acpi_gsi_to_irq as IRQD_WAKEUP_STATE, rather than
marking the acpi_gbl_FADT.sci_interrupt.
Cc: <sta...@vger.kernel.org> # 3.18+
Acked-by: Lv Zheng <lv.zh...@intel.com>
Signed-off-by: Chen Yu <yu.c.c...@intel.com>
---
drivers/acpi/sleep.c | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)
diff --git a/drivers/acpi/sleep.c b/drivers/acpi/sleep.c
index 2f0d4db..3fe1fbe 100644
--- a/drivers/acpi/sleep.c
+++ b/drivers/acpi/sleep.c
@@ -632,14 +632,16 @@ static int acpi_freeze_prepare(void)
acpi_enable_wakeup_devices(ACPI_STATE_S0);
acpi_enable_all_wakeup_gpes();
acpi_os_wait_events_complete();
- enable_irq_wake(acpi_gbl_FADT.sci_interrupt);
+ if (acpi_sci_irq_valid())
+ enable_irq_wake(acpi_sci_irq);
return 0;
}
static void acpi_freeze_restore(void)
{
acpi_disable_wakeup_devices(ACPI_STATE_S0);
- disable_irq_wake(acpi_gbl_FADT.sci_interrupt);
+ if (acpi_sci_irq_valid())
+ disable_irq_wake(acpi_sci_irq);
acpi_enable_all_runtime_gpes();
}
--
1.8.4.2
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