From 9b83ccd2f14f647936dcfbf4a9a20c501007dd69 Mon Sep 17 00:00:00 2001 From: "Rafael J. Wysocki" Date: Tue, 8 Sep 2009 23:15:31 +0200 Subject: ACPI PM: Replace wakeup.prepared with reference counter The wakeup.prepared flag is used for marking devices that have the wake-up power already enabled, so that the wake-up power is not enabled twice in a row for the same device. This assumes, however, that device wake-up power will only be enabled once, while the device is being prepared for a system-wide sleep transition, and the second attempt is made by acpi_enable_wakeup_device_prep(). With the upcoming PCI wake-up rework this assumption will not hold any more for PCI bridges and the root bridge whose wake-up power may be enabled as a result of wake-up enable propagation from other devices (eg. add-on devices that are not associated with any GPEs). Thus, there may be many attempts to enable wake-up power on a PCI bridge or the root bridge during a system power state transition and it's better to replace wakeup.prepared with a reference counter. Reviewed-by: Matthew Garrett Signed-off-by: Rafael J. Wysocki Signed-off-by: Jesse Barnes --- drivers/acpi/wakeup.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) (limited to 'drivers/acpi/wakeup.c') diff --git a/drivers/acpi/wakeup.c b/drivers/acpi/wakeup.c index 88725dcdf8bc..e0ee0c036f5a 100644 --- a/drivers/acpi/wakeup.c +++ b/drivers/acpi/wakeup.c @@ -68,7 +68,7 @@ void acpi_enable_wakeup_device(u8 sleep_state) /* If users want to disable run-wake GPE, * we only disable it for wake and leave it for runtime */ - if ((!dev->wakeup.state.enabled && !dev->wakeup.flags.prepared) + if ((!dev->wakeup.state.enabled && !dev->wakeup.prepare_count) || sleep_state > (u32) dev->wakeup.sleep_state) { if (dev->wakeup.flags.run_wake) { /* set_gpe_type will disable GPE, leave it like that */ @@ -100,7 +100,7 @@ void acpi_disable_wakeup_device(u8 sleep_state) if (!dev->wakeup.flags.valid) continue; - if ((!dev->wakeup.state.enabled && !dev->wakeup.flags.prepared) + if ((!dev->wakeup.state.enabled && !dev->wakeup.prepare_count) || sleep_state > (u32) dev->wakeup.sleep_state) { if (dev->wakeup.flags.run_wake) { acpi_set_gpe_type(dev->wakeup.gpe_device, -- cgit v1.2.2