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Message-Id: <200709201237.27469.lenb@kernel.org>
Date: Thu, 20 Sep 2007 12:37:27 -0400
From: Len Brown <lenb@...nel.org>
To: Maxim Levitsky <maximlevitsky@...il.com>
Cc: linux-kernel@...r.kernel.org, "Rafael J. Wysocki" <rjw@...k.pl>
Subject: Re: [BUG]: ACPI wakup devices (/proc/acpi/wakeup) don't wake the system anymore after hibernation
On Thursday 20 September 2007 12:13, Maxim Levitsky wrote:
> Hi,
>
> I had always a issue with wake-up devices after suspend-to disk.
>
> Scenario 1:
> 1) enable all devices devices: (echo "....." > /proc/acpi/wakeup), I have a script that does that
> 2) suspend to ram
> 3) hit a key on keyboard / mouse / send WOL magc packet, and system resumes in all cases
> 4) repeat the above, and all the same, good.
>
> Scenario 2:
> 1) enable all devices devices: (echo "....." > /proc/acpi/wakeup)
> 2) suspend to disk
> 3) send WOL, doesn't wake the system, but should, and usb can't wake since it is powered off
> 4) power system on, let system resume from disk, works
> 5) suspend to ram
> 6) hit a key on keyboard / mouse / send WOL magic packet, nothing works.
>
> I never got to the bottom of that issue, and just gave up, but not long ago,
> and I sadly don't remember exactly when / what .config I had, it begin to work
> I decided that this bug is fixed, and since I suspend to disk rarely, I assumed it works
> But now, I discovered that this bug is back, and I don't know what to do
> I tried 2.6.22, 2.6.21-rc7, 2.6.23-rc1, and all fail in same way.
Yes, please try this one:
commit ea256a37b093b9c0c0fa639eb9a0bff10df41998
Author: Alexey Starikovskiy <astarikovskiy@...e.de>
Date: Wed Sep 12 14:04:32 2007 +0400
ACPI: Hibernate erroneously disabled Suspend wakeup devices
S4 suspend to disk will disable GPE's permanently
because acpi_gpe_sleep_prepare() does not have
a counterpart at resume time. Thus, those devices
became unavailable for wakeup from subsequent
S3 suspend-to-ram.
Here acpi_gpe_sleep_prepare() is removed, and upon suspend
acpi_enable_wakeup_device() gets its functionality.
Upon resume, acpi_disable_wakeup_device() restores the state.
https://bugzilla.novell.com/show_bug.cgi?id=292300
Signed-off-by: Alexey Starikovskiy <astarikovskiy@...e.de>
Acked-by: Pavel Machek <pavel@...e.cz>
Signed-off-by: Len Brown <len.brown@...el.com>
diff --git a/drivers/acpi/sleep/poweroff.c b/drivers/acpi/sleep/poweroff.c
index 39e40d5..2725a60 100644
--- a/drivers/acpi/sleep/poweroff.c
+++ b/drivers/acpi/sleep/poweroff.c
@@ -32,7 +32,6 @@ int acpi_sleep_prepare(u32 acpi_state)
ACPI_FLUSH_CPU_CACHE();
acpi_enable_wakeup_device_prep(acpi_state);
#endif
- acpi_gpe_sleep_prepare(acpi_state);
acpi_enter_sleep_state_prep(acpi_state);
return 0;
}
diff --git a/drivers/acpi/sleep/sleep.h b/drivers/acpi/sleep/sleep.h
index ff1f850..a2ea125 100644
--- a/drivers/acpi/sleep/sleep.h
+++ b/drivers/acpi/sleep/sleep.h
@@ -5,6 +5,5 @@ extern int acpi_suspend (u32 state);
extern void acpi_enable_wakeup_device_prep(u8 sleep_state);
extern void acpi_enable_wakeup_device(u8 sleep_state);
extern void acpi_disable_wakeup_device(u8 sleep_state);
-extern void acpi_gpe_sleep_prepare(u32 sleep_state);
extern int acpi_sleep_prepare(u32 acpi_state);
diff --git a/drivers/acpi/sleep/wakeup.c b/drivers/acpi/sleep/wakeup.c
index 97c27dd..ed8e41b 100644
--- a/drivers/acpi/sleep/wakeup.c
+++ b/drivers/acpi/sleep/wakeup.c
@@ -64,36 +64,29 @@ void acpi_enable_wakeup_device(u8 sleep_state)
ACPI_FUNCTION_TRACE("acpi_enable_wakeup_device");
spin_lock(&acpi_device_lock);
list_for_each_safe(node, next, &acpi_wakeup_device_list) {
- struct acpi_device *dev = container_of(node,
- struct acpi_device,
- wakeup_list);
-
+ struct acpi_device *dev =
+ container_of(node, struct acpi_device, wakeup_list);
+ if (!dev->wakeup.flags.valid)
+ continue;
/* If users want to disable run-wake GPE,
* we only disable it for wake and leave it for runtime
*/
- if (dev->wakeup.flags.run_wake && !dev->wakeup.state.enabled) {
- spin_unlock(&acpi_device_lock);
- acpi_set_gpe_type(dev->wakeup.gpe_device,
- dev->wakeup.gpe_number,
- ACPI_GPE_TYPE_RUNTIME);
- /* Re-enable it, since set_gpe_type will disable it */
- acpi_enable_gpe(dev->wakeup.gpe_device,
- dev->wakeup.gpe_number, ACPI_ISR);
- spin_lock(&acpi_device_lock);
+ if (!dev->wakeup.state.enabled ||
+ sleep_state > (u32) dev->wakeup.sleep_state) {
+ if (dev->wakeup.flags.run_wake) {
+ spin_unlock(&acpi_device_lock);
+ /* set_gpe_type will disable GPE, leave it like that */
+ acpi_set_gpe_type(dev->wakeup.gpe_device,
+ dev->wakeup.gpe_number,
+ ACPI_GPE_TYPE_RUNTIME);
+ spin_lock(&acpi_device_lock);
+ }
continue;
}
-
- if (!dev->wakeup.flags.valid ||
- !dev->wakeup.state.enabled ||
- (sleep_state > (u32) dev->wakeup.sleep_state))
- continue;
-
spin_unlock(&acpi_device_lock);
- /* run-wake GPE has been enabled */
if (!dev->wakeup.flags.run_wake)
acpi_enable_gpe(dev->wakeup.gpe_device,
dev->wakeup.gpe_number, ACPI_ISR);
- dev->wakeup.state.active = 1;
spin_lock(&acpi_device_lock);
}
spin_unlock(&acpi_device_lock);
@@ -112,26 +105,25 @@ void acpi_disable_wakeup_device(u8 sleep_state)
spin_lock(&acpi_device_lock);
list_for_each_safe(node, next, &acpi_wakeup_device_list) {
- struct acpi_device *dev = container_of(node,
- struct acpi_device,
- wakeup_list);
+ struct acpi_device *dev =
+ container_of(node, struct acpi_device, wakeup_list);
- if (dev->wakeup.flags.run_wake && !dev->wakeup.state.enabled) {
- spin_unlock(&acpi_device_lock);
- acpi_set_gpe_type(dev->wakeup.gpe_device,
- dev->wakeup.gpe_number,
- ACPI_GPE_TYPE_WAKE_RUN);
- /* Re-enable it, since set_gpe_type will disable it */
- acpi_enable_gpe(dev->wakeup.gpe_device,
- dev->wakeup.gpe_number, ACPI_NOT_ISR);
- spin_lock(&acpi_device_lock);
+ if (!dev->wakeup.flags.valid)
continue;
- }
-
- if (!dev->wakeup.flags.valid ||
- !dev->wakeup.state.active ||
- (sleep_state > (u32) dev->wakeup.sleep_state))
+ if (!dev->wakeup.state.enabled ||
+ sleep_state > (u32) dev->wakeup.sleep_state) {
+ if (dev->wakeup.flags.run_wake) {
+ spin_unlock(&acpi_device_lock);
+ acpi_set_gpe_type(dev->wakeup.gpe_device,
+ dev->wakeup.gpe_number,
+ ACPI_GPE_TYPE_WAKE_RUN);
+ /* Re-enable it, since set_gpe_type will disable it */
+ acpi_enable_gpe(dev->wakeup.gpe_device,
+ dev->wakeup.gpe_number, ACPI_NOT_ISR);
+ spin_lock(&acpi_device_lock);
+ }
continue;
+ }
spin_unlock(&acpi_device_lock);
acpi_disable_wakeup_device_power(dev);
@@ -142,7 +134,6 @@ void acpi_disable_wakeup_device(u8 sleep_state)
acpi_clear_gpe(dev->wakeup.gpe_device,
dev->wakeup.gpe_number, ACPI_NOT_ISR);
}
- dev->wakeup.state.active = 0;
spin_lock(&acpi_device_lock);
}
spin_unlock(&acpi_device_lock);
@@ -160,48 +151,20 @@ static int __init acpi_wakeup_device_init(void)
struct acpi_device *dev = container_of(node,
struct acpi_device,
wakeup_list);
-
/* In case user doesn't load button driver */
- if (dev->wakeup.flags.run_wake && !dev->wakeup.state.enabled) {
- spin_unlock(&acpi_device_lock);
- acpi_set_gpe_type(dev->wakeup.gpe_device,
- dev->wakeup.gpe_number,
- ACPI_GPE_TYPE_WAKE_RUN);
- acpi_enable_gpe(dev->wakeup.gpe_device,
- dev->wakeup.gpe_number, ACPI_NOT_ISR);
- dev->wakeup.state.enabled = 1;
- spin_lock(&acpi_device_lock);
- }
+ if (!dev->wakeup.flags.run_wake || dev->wakeup.state.enabled)
+ continue;
+ spin_unlock(&acpi_device_lock);
+ acpi_set_gpe_type(dev->wakeup.gpe_device,
+ dev->wakeup.gpe_number,
+ ACPI_GPE_TYPE_WAKE_RUN);
+ acpi_enable_gpe(dev->wakeup.gpe_device,
+ dev->wakeup.gpe_number, ACPI_NOT_ISR);
+ dev->wakeup.state.enabled = 1;
+ spin_lock(&acpi_device_lock);
}
spin_unlock(&acpi_device_lock);
-
return 0;
}
late_initcall(acpi_wakeup_device_init);
-
-/*
- * Disable all wakeup GPEs before entering requested sleep state.
- * @sleep_state: ACPI state
- * Since acpi_enter_sleep_state() will disable all
- * RUNTIME GPEs, we simply mark all GPES that
- * are not enabled for wakeup from requested state as RUNTIME.
- */
-void acpi_gpe_sleep_prepare(u32 sleep_state)
-{
- struct list_head *node, *next;
-
- list_for_each_safe(node, next, &acpi_wakeup_device_list) {
- struct acpi_device *dev = container_of(node,
- struct acpi_device,
- wakeup_list);
-
- /* The GPE can wakeup system from this state, don't touch it */
- if ((u32) dev->wakeup.sleep_state >= sleep_state)
- continue;
- /* acpi_set_gpe_type will automatically disable GPE */
- acpi_set_gpe_type(dev->wakeup.gpe_device,
- dev->wakeup.gpe_number,
- ACPI_GPE_TYPE_RUNTIME);
- }
-}
diff --git a/include/acpi/acpi_bus.h b/include/acpi/acpi_bus.h
index 86aea44..17500a1 100644
--- a/include/acpi/acpi_bus.h
+++ b/include/acpi/acpi_bus.h
@@ -264,7 +264,6 @@ struct acpi_device_wakeup_flags {
struct acpi_device_wakeup_state {
u8 enabled:1;
- u8 active:1;
};
struct acpi_device_wakeup {
-
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