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PM: sleep: core: Rework the power.may_skip_resume handling

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Because the power.may_skip_resume device status bit is taken
into account in combination with the DPM_FLAG_LEAVE_SUSPENDED
driver flag, it can be set to 'true' for all devices in the
"suspend" phase of a suspend-resume cycle, so do that.

Then, neither the PM core nor the middle-layer (sybsystem) code
handling it needs to set it to 'true' any more and it just has
to be cleared if there is a reason to avoid skipping the "noirq"
and "early" resume callbacks provided by the driver, so update
the code in question accordingly.

Suggested-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Acked-by: Bjorn Helgaas <bhelgaas@google.com>
This commit is contained in:
Rafael J. Wysocki 2020-04-18 18:52:19 +02:00
parent 6e176bf8d4
commit 0fe8a1be59
3 changed files with 8 additions and 18 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
drivers/acpi/device_pm.c
View File

@ -1100,10 +1100,8 @@ int acpi_subsys_suspend_noirq(struct device *dev)
{
int ret;
if (dev_pm_smart_suspend_and_suspended(dev)) {
dev->power.may_skip_resume = true;
if (dev_pm_smart_suspend_and_suspended(dev))
return 0;
}
ret = pm_generic_suspend_noirq(dev);
if (ret)
@ -1116,8 +1114,8 @@ int acpi_subsys_suspend_noirq(struct device *dev)
* acpi_subsys_complete() to take care of fixing up the device's state
* anyway, if need be.
*/
dev->power.may_skip_resume = device_may_wakeup(dev) ||
!device_can_wakeup(dev);
if (device_can_wakeup(dev) && !device_may_wakeup(dev))
dev->power.may_skip_resume = false;
return 0;
}

10
drivers/base/power/main.c
View File

@ -1415,14 +1415,8 @@ static int __device_suspend_late(struct device *dev, pm_message_t state, bool as
if (callback)
goto Run;
if (dev_pm_smart_suspend_and_suspended(dev)) {
/*
* In principle, the resume of the device may be skippend if it
* remains in runtime suspend at this point.
*/
dev->power.may_skip_resume = true;
if (dev_pm_smart_suspend_and_suspended(dev))
goto Skip;
}
if (dev->driver && dev->driver->pm) {
info = "late driver ";
@ -1647,7 +1641,7 @@ static int __device_suspend(struct device *dev, pm_message_t state, bool async)
dev->power.direct_complete = false;
}
dev->power.may_skip_resume = false;
dev->power.may_skip_resume = true;
dev->power.must_resume = false;
dpm_watchdog_set(&wd, dev);

8
drivers/pci/pci-driver.c
View File

@ -789,10 +789,8 @@ static int pci_pm_suspend_noirq(struct device *dev)
struct pci_dev *pci_dev = to_pci_dev(dev);
const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL;
if (dev_pm_smart_suspend_and_suspended(dev)) {
dev->power.may_skip_resume = true;
if (dev_pm_smart_suspend_and_suspended(dev))
return 0;
}
if (pci_has_legacy_pm_support(pci_dev))
return pci_legacy_suspend_late(dev, PMSG_SUSPEND);
@ -880,8 +878,8 @@ Fixup:
* pci_pm_complete() to take care of fixing up the device's state
* anyway, if need be.
*/
dev->power.may_skip_resume = device_may_wakeup(dev) ||
!device_can_wakeup(dev);
if (device_can_wakeup(dev) && !device_may_wakeup(dev))
dev->power.may_skip_resume = false;
return 0;
}