diff options
Diffstat (limited to 'drivers/acpi/sleep.c')
-rw-r--r-- | drivers/acpi/sleep.c | 60 |
1 files changed, 47 insertions, 13 deletions
diff --git a/drivers/acpi/sleep.c b/drivers/acpi/sleep.c index 6747a279621b..e5f95922bc21 100644 --- a/drivers/acpi/sleep.c +++ b/drivers/acpi/sleep.c @@ -61,8 +61,11 @@ static struct notifier_block tts_notifier = { static int acpi_sleep_prepare(u32 acpi_state) { #ifdef CONFIG_ACPI_SLEEP + unsigned long acpi_wakeup_address; + /* do we have a wakeup address for S2 and S3? */ if (acpi_state == ACPI_STATE_S3) { + acpi_wakeup_address = acpi_get_wakeup_address(); if (!acpi_wakeup_address) return -EFAULT; acpi_set_waking_vector(acpi_wakeup_address); @@ -987,21 +990,41 @@ static void acpi_s2idle_sync(void) acpi_os_wait_events_complete(); /* synchronize Notify handling */ } -static void acpi_s2idle_wake(void) +static bool acpi_s2idle_wake(void) { - /* - * If IRQD_WAKEUP_ARMED is set for the SCI at this point, the SCI has - * not triggered while suspended, so bail out. - */ - if (!acpi_sci_irq_valid() || - irqd_is_wakeup_armed(irq_get_irq_data(acpi_sci_irq))) - return; + if (!acpi_sci_irq_valid()) + return pm_wakeup_pending(); + + while (pm_wakeup_pending()) { + /* + * If IRQD_WAKEUP_ARMED is set for the SCI at this point, the + * SCI has not triggered while suspended, so bail out (the + * wakeup is pending anyway and the SCI is not the source of + * it). + */ + if (irqd_is_wakeup_armed(irq_get_irq_data(acpi_sci_irq))) + return true; + + /* + * If the status bit of any enabled fixed event is set, the + * wakeup is regarded as valid. + */ + if (acpi_any_fixed_event_status_set()) + return true; + + /* + * If there are no EC events to process and at least one of the + * other enabled GPEs is active, the wakeup is regarded as a + * genuine one. + * + * Note that the checks below must be carried out in this order + * to avoid returning prematurely due to a change of the EC GPE + * status bit from unset to set between the checks with the + * status bits of all the other GPEs unset. + */ + if (acpi_any_gpe_status_set() && !acpi_ec_dispatch_gpe()) + return true; - /* - * If there are EC events to process, the wakeup may be a spurious one - * coming from the EC. - */ - if (acpi_ec_dispatch_gpe()) { /* * Cancel the wakeup and process all pending events in case * there are any wakeup ones in there. @@ -1014,8 +1037,19 @@ static void acpi_s2idle_wake(void) acpi_s2idle_sync(); + /* + * The SCI is in the "suspended" state now and it cannot produce + * new wakeup events till the rearming below, so if any of them + * are pending here, they must be resulting from the processing + * of EC events above or coming from somewhere else. + */ + if (pm_wakeup_pending()) + return true; + rearm_wake_irq(acpi_sci_irq); } + + return false; } static void acpi_s2idle_restore_early(void) |