This is a note to let you know that I've just added the patch titled
ACPI / PM: Fix incorrect wakeup IRQ setting during suspend-to-idle
to the 4.3-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
acpi-pm-fix-incorrect-wakeup-irq-setting-during-suspend-to-idle.patch
and it can be found in the queue-4.3 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <[email protected]> know about it.
>From 8c01275e0cdf1959aa25c322fd5870c097733195 Mon Sep 17 00:00:00 2001
From: Chen Yu <[email protected]>
Date: Sun, 25 Oct 2015 01:02:46 +0800
Subject: ACPI / PM: Fix incorrect wakeup IRQ setting during suspend-to-idle
From: Chen Yu <[email protected]>
commit 8c01275e0cdf1959aa25c322fd5870c097733195 upstream.
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.
Acked-by: Lv Zheng <[email protected]>
Signed-off-by: Chen Yu <[email protected]>
Signed-off-by: Rafael J. Wysocki <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
---
drivers/acpi/sleep.c | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)
--- 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();
}
Patches currently in stable-queue which might be from [email protected] are
queue-4.3/acpi-using-correct-irq-when-waiting-for-events.patch
queue-4.3/acpi-pm-fix-incorrect-wakeup-irq-setting-during-suspend-to-idle.patch
queue-4.3/acpi-use-correct-irq-when-uninstalling-acpi-interrupt-handler.patch
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