Fix to "All wake-up devices are disabled after suspend-to disk" isn't yet included in mainline

Maxim Levitsky
2007-10-17T02:40:20Z

Hi,

A while ago I asked on LKML about the problem of loosing all wake device capabilities, after a suspend to disk
(eg: I can't wake the system from keyboard if I suspend to disk and then to ram)

I was provided with the patch that fixes this problem completely.
The merge window is open, but I still don't see it in the kernel.
Due to changes it doesn't anymore apply to latest git.

Was it missed?

The patch below for the reference,
(acpi_sleep_prepare was moved to /drivers/acpi/sleep/main.c, so I did in-line change in the patch)

Best regards,
Maxim Levitsky

commit ea256a37b093b9c0c0fa639eb9a0bff10df41998
Author: Alexey Starikovskiy <astarikovskiy@suse.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@suse.de>
Acked-by: Pavel Machek <pavel@suse.cz>
Signed-off-by: Len Brown <len.brown@intel.com>
---
drivers/acpi/sleep/poweroff.c | 1 -
drivers/acpi/sleep/sleep.h | 1 -
drivers/acpi/sleep/wakeup.c | 117 ++++++++++++++---------------------------
include/acpi/acpi_bus.h | 1 -
4 files changed, 40 insertions(+), 80 deletions(-)

diff --git a/drivers/acpi/sleep/main.c b/drivers/acpi/sleep/main.c
index 39e40d5..2725a60 100644
--- a/drivers/acpi/sleep/main.c
+++ b/drivers/acpi/sleep/main.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 {
--
1.5.3.4