The patch below does not apply to the 4.1-stable tree.
If someone wants it applied there, or to any other stable or longterm
tree, then please email the backport, including the original git commit
id to <stable@xxxxxxxxxxxxxxx>.
thanks,
greg k-h
------------------ original commit in Linus's tree ------------------
>From 8c01275e0cdf1959aa25c322fd5870c097733195 Mon Sep 17 00:00:00 2001
From: Chen Yu <yu.c.chen@xxxxxxxxx>
Date: Sun, 25 Oct 2015 01:02:46 +0800
Subject: [PATCH] ACPI / PM: Fix incorrect wakeup IRQ setting during
suspend-to-idle
For an ACPI compatible system, the SCI (ACPI System Control
Interrupt) is used to wake the system up from suspend-to-idle.
Once the CPU is woken up by the SCI, the interrupt handler will
first check if the current IRQ has been configured for system
wakeup, so irq_pm_check_wakeup() is invoked to validate the IRQ
number. However, during suspend-to-idle, enable_irq_wake() is
called for acpi_gbl_FADT.sci_interrupt, although the IRQ number
that the SCI handler has been installed for should be passed to
it instead. Thus, if acpi_gbl_FADT.sci_interrupt happens to be
different from that number, ACPI interrupts will not be able to
wake up the system from sleep.
Fix this problem by passing the IRQ number returned by
acpi_gsi_to_irq() to enable_irq_wake() instead of
acpi_gbl_FADT.sci_interrupt.
Cc: 3.18+ <stable@xxxxxxxxxxxxxxx> # 3.18+
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>
diff --git a/drivers/acpi/sleep.c b/drivers/acpi/sleep.c
index 2f0d4db40a9e..3fe1fbec7677 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();
}
--
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