ACPI / PM: Fix incorrect wakeup IRQ setting during suspend-to-idle
authorChen Yu <yu.c.chen@intel.com>
Sat, 24 Oct 2015 17:02:46 +0000 (01:02 +0800)
committerRafael J. Wysocki <rafael.j.wysocki@intel.com>
Mon, 26 Oct 2015 03:39:26 +0000 (04:39 +0100)
commit8c01275e0cdf1959aa25c322fd5870c097733195
tree3b667a834110739761d3f78d9ab7ce3640c7d3a9
parentefb1cf7d28b8aeacec53e9ba8f3f2809c5cb9686
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@vger.kernel.org> # 3.18+
Acked-by: Lv Zheng <lv.zheng@intel.com>
Signed-off-by: Chen Yu <yu.c.chen@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
drivers/acpi/sleep.c