PM: Simplify the new suspend/hibernation framework for devices
PM: Simplify the new suspend/hibernation framework for devices
Following the discussion at the Kernel Summit, simplify the new
device PM framework by merging 'struct pm_ops' and
'struct pm_ext_ops' and removing pointers to 'struct pm_ext_ops'
from 'struct platform_driver' and 'struct pci_driver'.
After this change, the suspend/hibernation callbacks will only
reside in 'struct device_driver' as well as at the bus type/
device class/device type level. Accordingly, PCI and platform
device drivers are now expected to put their suspend/hibernation
callbacks into the 'struct device_driver' embedded in
'struct pci_driver' or 'struct platform_driver', respectively.
Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Acked-by: Pavel Machek <pavel@suse.cz>
Cc: Jesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
diff --git a/drivers/base/platform.c b/drivers/base/platform.c
index dfcbfe5..6c743b6 100644
--- a/drivers/base/platform.c
+++ b/drivers/base/platform.c
@@ -503,8 +503,6 @@
drv->driver.suspend = platform_drv_suspend;
if (drv->resume)
drv->driver.resume = platform_drv_resume;
- if (drv->pm)
- drv->driver.pm = &drv->pm->base;
return driver_register(&drv->driver);
}
EXPORT_SYMBOL_GPL(platform_driver_register);
@@ -686,7 +684,10 @@
struct device_driver *drv = dev->driver;
int ret = 0;
- if (drv && drv->pm) {
+ if (!drv)
+ return 0;
+
+ if (drv->pm) {
if (drv->pm->suspend)
ret = drv->pm->suspend(dev);
} else {
@@ -698,16 +699,15 @@
static int platform_pm_suspend_noirq(struct device *dev)
{
- struct platform_driver *pdrv;
+ struct device_driver *drv = dev->driver;
int ret = 0;
- if (!dev->driver)
+ if (!drv)
return 0;
- pdrv = to_platform_driver(dev->driver);
- if (pdrv->pm) {
- if (pdrv->pm->suspend_noirq)
- ret = pdrv->pm->suspend_noirq(dev);
+ if (drv->pm) {
+ if (drv->pm->suspend_noirq)
+ ret = drv->pm->suspend_noirq(dev);
} else {
ret = platform_legacy_suspend_late(dev, PMSG_SUSPEND);
}
@@ -720,7 +720,10 @@
struct device_driver *drv = dev->driver;
int ret = 0;
- if (drv && drv->pm) {
+ if (!drv)
+ return 0;
+
+ if (drv->pm) {
if (drv->pm->resume)
ret = drv->pm->resume(dev);
} else {
@@ -732,16 +735,15 @@
static int platform_pm_resume_noirq(struct device *dev)
{
- struct platform_driver *pdrv;
+ struct device_driver *drv = dev->driver;
int ret = 0;
- if (!dev->driver)
+ if (!drv)
return 0;
- pdrv = to_platform_driver(dev->driver);
- if (pdrv->pm) {
- if (pdrv->pm->resume_noirq)
- ret = pdrv->pm->resume_noirq(dev);
+ if (drv->pm) {
+ if (drv->pm->resume_noirq)
+ ret = drv->pm->resume_noirq(dev);
} else {
ret = platform_legacy_resume_early(dev);
}
@@ -780,16 +782,15 @@
static int platform_pm_freeze_noirq(struct device *dev)
{
- struct platform_driver *pdrv;
+ struct device_driver *drv = dev->driver;
int ret = 0;
- if (!dev->driver)
+ if (!drv)
return 0;
- pdrv = to_platform_driver(dev->driver);
- if (pdrv->pm) {
- if (pdrv->pm->freeze_noirq)
- ret = pdrv->pm->freeze_noirq(dev);
+ if (drv->pm) {
+ if (drv->pm->freeze_noirq)
+ ret = drv->pm->freeze_noirq(dev);
} else {
ret = platform_legacy_suspend_late(dev, PMSG_FREEZE);
}
@@ -802,7 +803,10 @@
struct device_driver *drv = dev->driver;
int ret = 0;
- if (drv && drv->pm) {
+ if (!drv)
+ return 0;
+
+ if (drv->pm) {
if (drv->pm->thaw)
ret = drv->pm->thaw(dev);
} else {
@@ -814,16 +818,15 @@
static int platform_pm_thaw_noirq(struct device *dev)
{
- struct platform_driver *pdrv;
+ struct device_driver *drv = dev->driver;
int ret = 0;
- if (!dev->driver)
+ if (!drv)
return 0;
- pdrv = to_platform_driver(dev->driver);
- if (pdrv->pm) {
- if (pdrv->pm->thaw_noirq)
- ret = pdrv->pm->thaw_noirq(dev);
+ if (drv->pm) {
+ if (drv->pm->thaw_noirq)
+ ret = drv->pm->thaw_noirq(dev);
} else {
ret = platform_legacy_resume_early(dev);
}
@@ -836,7 +839,10 @@
struct device_driver *drv = dev->driver;
int ret = 0;
- if (drv && drv->pm) {
+ if (!drv)
+ return 0;
+
+ if (drv->pm) {
if (drv->pm->poweroff)
ret = drv->pm->poweroff(dev);
} else {
@@ -848,16 +854,15 @@
static int platform_pm_poweroff_noirq(struct device *dev)
{
- struct platform_driver *pdrv;
+ struct device_driver *drv = dev->driver;
int ret = 0;
- if (!dev->driver)
+ if (!drv)
return 0;
- pdrv = to_platform_driver(dev->driver);
- if (pdrv->pm) {
- if (pdrv->pm->poweroff_noirq)
- ret = pdrv->pm->poweroff_noirq(dev);
+ if (drv->pm) {
+ if (drv->pm->poweroff_noirq)
+ ret = drv->pm->poweroff_noirq(dev);
} else {
ret = platform_legacy_suspend_late(dev, PMSG_HIBERNATE);
}
@@ -870,7 +875,10 @@
struct device_driver *drv = dev->driver;
int ret = 0;
- if (drv && drv->pm) {
+ if (!drv)
+ return 0;
+
+ if (drv->pm) {
if (drv->pm->restore)
ret = drv->pm->restore(dev);
} else {
@@ -882,16 +890,15 @@
static int platform_pm_restore_noirq(struct device *dev)
{
- struct platform_driver *pdrv;
+ struct device_driver *drv = dev->driver;
int ret = 0;
- if (!dev->driver)
+ if (!drv)
return 0;
- pdrv = to_platform_driver(dev->driver);
- if (pdrv->pm) {
- if (pdrv->pm->restore_noirq)
- ret = pdrv->pm->restore_noirq(dev);
+ if (drv->pm) {
+ if (drv->pm->restore_noirq)
+ ret = drv->pm->restore_noirq(dev);
} else {
ret = platform_legacy_resume_early(dev);
}
@@ -912,17 +919,15 @@
#endif /* !CONFIG_HIBERNATION */
-static struct pm_ext_ops platform_pm_ops = {
- .base = {
- .prepare = platform_pm_prepare,
- .complete = platform_pm_complete,
- .suspend = platform_pm_suspend,
- .resume = platform_pm_resume,
- .freeze = platform_pm_freeze,
- .thaw = platform_pm_thaw,
- .poweroff = platform_pm_poweroff,
- .restore = platform_pm_restore,
- },
+static struct dev_pm_ops platform_dev_pm_ops = {
+ .prepare = platform_pm_prepare,
+ .complete = platform_pm_complete,
+ .suspend = platform_pm_suspend,
+ .resume = platform_pm_resume,
+ .freeze = platform_pm_freeze,
+ .thaw = platform_pm_thaw,
+ .poweroff = platform_pm_poweroff,
+ .restore = platform_pm_restore,
.suspend_noirq = platform_pm_suspend_noirq,
.resume_noirq = platform_pm_resume_noirq,
.freeze_noirq = platform_pm_freeze_noirq,
@@ -931,7 +936,7 @@
.restore_noirq = platform_pm_restore_noirq,
};
-#define PLATFORM_PM_OPS_PTR &platform_pm_ops
+#define PLATFORM_PM_OPS_PTR (&platform_dev_pm_ops)
#else /* !CONFIG_PM_SLEEP */