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Date: Thu, 21 Feb 2008 12:57:29 +0100
From: Pavel Machek <pavel@....cz>
To: Harvey Harrison <harvey.harrison@...il.com>,
kernel list <linux-kernel@...r.kernel.org>
Cc: Linux-pm mailing list <linux-pm@...ts.osdl.org>
Subject: Re: Feature Removal - power_state
Hi!
> Hi Pavel, is this entry still valid in feature-removal-schedule.txt?
Yes, I'd like to get rid of that.
> What: dev->power.power_state
> When: July 2007
> Why: Broken design for runtime control over driver power states,
> confusing
> driver-internal runtime power management with: mechanisms to support
> system-wide sleep state transitions; event codes that distinguish
> different phases of swsusp "sleep" transitions; and userspace policy
> inputs. This framework was never widely used, and most attempts to
> use it were broken. Drivers should instead be exposing domain-specific
> interfaces either to kernel or to userspace.
> Who: Pavel Machek <pavel@...e.cz>
...but it is not easy. Most uses are write only (and easy to kill),
but at least radeon driver uses it for real.
This is what I came up with so far:
diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c
index b4985bc..a31572d 100644
--- a/drivers/ata/libata-core.c
+++ b/drivers/ata/libata-core.c
@@ -6542,8 +6542,6 @@ int ata_host_suspend(struct ata_host *ho
ata_lpm_enable(host);
rc = ata_host_request_pm(host, mesg, 0, ATA_EHI_QUIET, 1);
- if (rc == 0)
- host->dev->power.power_state = mesg;
return rc;
}
@@ -6562,7 +6560,6 @@ void ata_host_resume(struct ata_host *ho
{
ata_host_request_pm(host, PMSG_ON, ATA_EH_SOFTRESET,
ATA_EHI_NO_AUTOPSY | ATA_EHI_QUIET, 0);
- host->dev->power.power_state = PMSG_ON;
/* reenable link pm */
ata_lpm_disable(host);
diff --git a/drivers/base/power/main.c b/drivers/base/power/main.c
index d180795..268855d 100644
--- a/drivers/base/power/main.c
+++ b/drivers/base/power/main.c
@@ -421,11 +421,6 @@ int suspend_device(struct device *dev, p
{
int error = 0;
- if (dev->power.power_state.event) {
- dev_dbg(dev, "PM: suspend %d-->%d\n",
- dev->power.power_state.event, state.event);
- }
-
if (dev->class && dev->class->suspend) {
suspend_device_dbg(dev, state, "class ");
error = dev->class->suspend(dev, state);
diff --git a/drivers/input/serio/i8042.c b/drivers/input/serio/i8042.c
index 2763394..3816e44 100644
--- a/drivers/input/serio/i8042.c
+++ b/drivers/input/serio/i8042.c
@@ -895,13 +895,8 @@ #ifdef CONFIG_PM
static int i8042_suspend(struct platform_device *dev, pm_message_t state)
{
- if (dev->dev.power.power_state.event != state.event) {
- if (state.event == PM_EVENT_SUSPEND)
- i8042_controller_reset();
-
- dev->dev.power.power_state = state;
- }
-
+ if (state.event == PM_EVENT_SUSPEND)
+ i8042_controller_reset();
return 0;
}
@@ -914,12 +909,6 @@ static int i8042_resume(struct platform_
{
int error;
-/*
- * Do not bother with restoring state if we haven't suspened yet
- */
- if (dev->dev.power.power_state.event == PM_EVENT_ON)
- return 0;
-
error = i8042_controller_check();
if (error)
return error;
@@ -954,9 +943,6 @@ static int i8042_resume(struct platform_
i8042_enable_kbd_port();
i8042_interrupt(0, NULL);
-
- dev->dev.power.power_state = PMSG_ON;
-
return 0;
}
#endif /* CONFIG_PM */
diff --git a/drivers/input/serio/serio.c b/drivers/input/serio/serio.c
index 7f52938..0673f3a 100644
--- a/drivers/input/serio/serio.c
+++ b/drivers/input/serio/serio.c
@@ -912,13 +912,8 @@ #endif /* CONFIG_HOTPLUG */
#ifdef CONFIG_PM
static int serio_suspend(struct device *dev, pm_message_t state)
{
- if (dev->power.power_state.event != state.event) {
- if (state.event == PM_EVENT_SUSPEND)
- serio_cleanup(to_serio_port(dev));
-
- dev->power.power_state = state;
- }
-
+ if (state.event == PM_EVENT_SUSPEND)
+ serio_cleanup(to_serio_port(dev));
return 0;
}
@@ -926,8 +921,7 @@ static int serio_resume(struct device *d
{
struct serio *serio = to_serio_port(dev);
- if (dev->power.power_state.event != PM_EVENT_ON &&
- serio_reconnect_driver(serio)) {
+ if (serio_reconnect_driver(serio)) {
/*
* Driver re-probing can take a while, so better let kseriod
* deal with it.
@@ -935,8 +929,6 @@ static int serio_resume(struct device *d
serio_rescan(serio);
}
- dev->power.power_state = PMSG_ON;
-
return 0;
}
#endif /* CONFIG_PM */
diff --git a/drivers/usb/core/driver.c b/drivers/usb/core/driver.c
index 801b6f1..eeb8115 100644
--- a/drivers/usb/core/driver.c
+++ b/drivers/usb/core/driver.c
@@ -794,8 +794,6 @@ static int usb_suspend_device(struct usb
done:
dev_vdbg(&udev->dev, "%s: status %d\n", __FUNCTION__, status);
- if (status == 0)
- udev->dev.power.power_state.event = msg.event;
return status;
}
@@ -826,7 +824,6 @@ static int usb_resume_device(struct usb_
dev_vdbg(&udev->dev, "%s: status %d\n", __FUNCTION__, status);
if (status == 0) {
udev->autoresume_disabled = 0;
- udev->dev.power.power_state.event = PM_EVENT_ON;
}
return status;
}
diff --git a/drivers/usb/core/hcd-pci.c b/drivers/usb/core/hcd-pci.c
index 84760dd..739407b 100644
--- a/drivers/usb/core/hcd-pci.c
+++ b/drivers/usb/core/hcd-pci.c
@@ -73,7 +73,6 @@ int usb_hcd_pci_probe(struct pci_dev *de
if (pci_enable_device(dev) < 0)
return -ENODEV;
dev->current_state = PCI_D0;
- dev->dev.power.power_state = PMSG_ON;
if (!dev->irq) {
dev_err(&dev->dev,
@@ -302,8 +301,6 @@ int usb_hcd_pci_suspend(struct pci_dev *
done:
if (retval == 0) {
- dev->dev.power.power_state = PMSG_SUSPEND;
-
#ifdef CONFIG_PPC_PMAC
/* Disable ASIC clocks for USB */
if (machine_is(powermac)) {
@@ -406,8 +403,6 @@ #endif
pci_set_master(dev);
pci_restore_state(dev);
- dev->dev.power.power_state = PMSG_ON;
-
clear_bit(HCD_FLAG_SAW_IRQ, &hcd->flags);
if (hcd->driver->resume) {
diff --git a/drivers/usb/core/usb.h b/drivers/usb/core/usb.h
index 2375194..1bf8ccb 100644
--- a/drivers/usb/core/usb.h
+++ b/drivers/usb/core/usb.h
@@ -114,13 +114,11 @@ static inline int is_usb_device_driver(s
static inline void mark_active(struct usb_interface *f)
{
f->is_active = 1;
- f->dev.power.power_state.event = PM_EVENT_ON;
}
static inline void mark_quiesced(struct usb_interface *f)
{
f->is_active = 0;
- f->dev.power.power_state.event = PM_EVENT_SUSPEND;
}
static inline int is_active(const struct usb_interface *f)
diff --git a/include/linux/pm.h b/include/linux/pm.h
index ef877fb..46d2306 100644
--- a/include/linux/pm.h
+++ b/include/linux/pm.h
@@ -174,7 +174,6 @@ #define PMSG_SUSPEND ((struct pm_message
#define PMSG_ON ((struct pm_message){ .event = PM_EVENT_ON, })
struct dev_pm_info {
- pm_message_t power_state;
unsigned can_wakeup:1;
#ifdef CONFIG_PM_SLEEP
unsigned should_wakeup:1;
diff --git a/net/rfkill/rfkill.c b/net/rfkill/rfkill.c
index 1a47f5d..81d7f5f 100644
--- a/net/rfkill/rfkill.c
+++ b/net/rfkill/rfkill.c
@@ -231,18 +231,14 @@ static int rfkill_suspend(struct device
{
struct rfkill *rfkill = to_rfkill(dev);
- if (dev->power.power_state.event != state.event) {
- if (state.event == PM_EVENT_SUSPEND) {
- mutex_lock(&rfkill->mutex);
-
- if (rfkill->state == RFKILL_STATE_ON)
- rfkill->toggle_radio(rfkill->data,
- RFKILL_STATE_OFF);
+ if (state.event == PM_EVENT_SUSPEND) {
+ mutex_lock(&rfkill->mutex);
- mutex_unlock(&rfkill->mutex);
- }
+ if (rfkill->state == RFKILL_STATE_ON)
+ rfkill->toggle_radio(rfkill->data,
+ RFKILL_STATE_OFF);
- dev->power.power_state = state;
+ mutex_unlock(&rfkill->mutex);
}
return 0;
@@ -252,16 +248,12 @@ static int rfkill_resume(struct device *
{
struct rfkill *rfkill = to_rfkill(dev);
- if (dev->power.power_state.event != PM_EVENT_ON) {
- mutex_lock(&rfkill->mutex);
+ mutex_lock(&rfkill->mutex);
- if (rfkill->state == RFKILL_STATE_ON)
- rfkill->toggle_radio(rfkill->data, RFKILL_STATE_ON);
+ if (rfkill->state == RFKILL_STATE_ON)
+ rfkill->toggle_radio(rfkill->data, RFKILL_STATE_ON);
- mutex_unlock(&rfkill->mutex);
- }
-
- dev->power.power_state = PMSG_ON;
+ mutex_unlock(&rfkill->mutex);
return 0;
}
#else
--
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
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