On Friday, July 02, 2010, Rafael J. Wysocki wrote:
> From: Rafael J. Wysocki <rjw@xxxxxxx>
>
> To simplify the enabling of wakeup devices during system suspend and
> hibernation, merge acpi_enable_wakeup_device_prep() with
> acpi_disable_wakeup_device() and remove unnecessary (and no longer
> valid) comments from the latter. Rename acpi_enable_wakeup_device()
> to acpi_enable_wakeup_devices() and acpi_disable_wakeup_device()
> to acpi_disable_wakeup_devices(), because these functions usually
> operate on multiple device objects.
>
> Signed-off-by: Rafael J. Wysocki <rjw@xxxxxxx>
Below is a version without the last hunk in wakeup.c (that didin't apply and
was cosmetic-only).
Rafael
---
From: Rafael J. Wysocki <rjw@xxxxxxx>
Subject: ACPI / Wakeup: Simplify enabling of wakeup devices
To simplify the enabling of wakeup devices during system suspend and
hibernation, merge acpi_enable_wakeup_device_prep() with
acpi_disable_wakeup_device() and remove unnecessary (and no longer
valid) comments from the latter. Rename acpi_enable_wakeup_device()
to acpi_enable_wakeup_devices() and acpi_disable_wakeup_device()
to acpi_disable_wakeup_devices(), because these functions usually
operate on multiple device objects.
Signed-off-by: Rafael J. Wysocki <rjw@xxxxxxx>
---
drivers/acpi/sleep.c | 5 ++---
drivers/acpi/sleep.h | 5 ++---
drivers/acpi/wakeup.c | 50 +++++++++++---------------------------------------
3 files changed, 15 insertions(+), 45 deletions(-)
Index: linux-2.6/drivers/acpi/wakeup.c
===================================================================
--- linux-2.6.orig/drivers/acpi/wakeup.c
+++ linux-2.6/drivers/acpi/wakeup.c
@@ -21,46 +21,18 @@
ACPI_MODULE_NAME("wakeup_devices")
/**
- * acpi_enable_wakeup_device_prep - Prepare wake-up devices.
+ * acpi_enable_wakeup_devices - Enable wake-up device GPEs.
* @sleep_state: ACPI system sleep state.
*
- * Enable all wake-up devices' power, unless the requested system sleep state is
- * too deep.
+ * Enable wakeup device power of devices with the state.enable flag set and set
+ * the wakeup enable mask bits in the GPE registers that correspond to wakeup
+ * devices.
*/
-void acpi_enable_wakeup_device_prep(u8 sleep_state)
+void acpi_enable_wakeup_devices(u8 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);
-
- if (!dev->wakeup.flags.valid || !dev->wakeup.state.enabled
- || (sleep_state > (u32) dev->wakeup.sleep_state))
- continue;
-
- acpi_enable_wakeup_device_power(dev, sleep_state);
- }
-}
-
-/**
- * acpi_enable_wakeup_device - Enable wake-up device GPEs.
- * @sleep_state: ACPI system sleep state.
- *
- * Enable all wake-up devices' GPEs, with the assumption that
- * acpi_disable_all_gpes() was executed before, so we don't need to disable any
- * GPEs here.
- */
-void acpi_enable_wakeup_device(u8 sleep_state)
-{
- struct list_head *node, *next;
-
- /*
- * Caution: this routine must be invoked when interrupt is disabled
- * Refer ACPI2.0: P212
- */
- list_for_each_safe(node, next, &acpi_wakeup_device_list) {
struct acpi_device *dev =
container_of(node, struct acpi_device, wakeup_list);
@@ -69,6 +41,9 @@ void acpi_enable_wakeup_device(u8 sleep_
|| sleep_state > (u32) dev->wakeup.sleep_state)
continue;
+ if (dev->wakeup.state.enabled)
+ acpi_enable_wakeup_device_power(dev, sleep_state);
+
/* The wake-up power should have been enabled already. */
acpi_gpe_wakeup(dev->wakeup.gpe_device, dev->wakeup.gpe_number,
ACPI_GPE_ENABLE);
@@ -76,13 +51,10 @@ void acpi_enable_wakeup_device(u8 sleep_
}
/**
- * acpi_disable_wakeup_device - Disable devices' wakeup capability.
+ * acpi_disable_wakeup_devices - Disable devices' wakeup capability.
* @sleep_state: ACPI system sleep state.
- *
- * This function only affects devices with wakeup.state.enabled set, which means
- * that it reverses the changes made by acpi_enable_wakeup_device_prep().
*/
-void acpi_disable_wakeup_device(u8 sleep_state)
+void acpi_disable_wakeup_devices(u8 sleep_state)
{
struct list_head *node, *next;
Index: linux-2.6/drivers/acpi/sleep.h
===================================================================
--- linux-2.6.orig/drivers/acpi/sleep.h
+++ linux-2.6/drivers/acpi/sleep.h
@@ -2,9 +2,8 @@
extern u8 sleep_states[];
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_enable_wakeup_devices(u8 sleep_state);
+extern void acpi_disable_wakeup_devices(u8 sleep_state);
extern struct list_head acpi_wakeup_device_list;
extern struct mutex acpi_device_lock;
Index: linux-2.6/drivers/acpi/sleep.c
===================================================================
--- linux-2.6.orig/drivers/acpi/sleep.c
+++ linux-2.6/drivers/acpi/sleep.c
@@ -73,8 +73,7 @@ static int acpi_sleep_prepare(u32 acpi_s
#endif
printk(KERN_INFO PREFIX "Preparing to enter system sleep state S%d\n",
acpi_state);
- acpi_enable_wakeup_device_prep(acpi_state);
- acpi_enable_wakeup_device(acpi_state);
+ acpi_enable_wakeup_devices(acpi_state);
acpi_enter_sleep_state_prep(acpi_state);
return 0;
}
@@ -153,7 +152,7 @@ static void acpi_pm_finish(void)
printk(KERN_INFO PREFIX "Waking up from system sleep state S%d\n",
acpi_state);
- acpi_disable_wakeup_device(acpi_state);
+ acpi_disable_wakeup_devices(acpi_state);
acpi_leave_sleep_state(acpi_state);
/* reset firmware waking vector */
--
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