From 0fe8a1be599ab97f840ba22d98cb8f24a9f9e872 Mon Sep 17 00:00:00 2001 From: "Rafael J. Wysocki" Date: Sat, 18 Apr 2020 18:52:19 +0200 Subject: [PATCH] PM: sleep: core: Rework the power.may_skip_resume handling 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 Signed-off-by: Rafael J. Wysocki Acked-by: Alan Stern Acked-by: Bjorn Helgaas --- drivers/acpi/device_pm.c | 8 +++----- drivers/base/power/main.c | 10 ++-------- drivers/pci/pci-driver.c | 8 +++----- 3 files changed, 8 insertions(+), 18 deletions(-) diff --git a/drivers/acpi/device_pm.c b/drivers/acpi/device_pm.c index 3996840..1b02d7d 100644 --- a/drivers/acpi/device_pm.c +++ b/drivers/acpi/device_pm.c @@ -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; } diff --git a/drivers/base/power/main.c b/drivers/base/power/main.c index 25b0302..5adf0be 100644 --- a/drivers/base/power/main.c +++ b/drivers/base/power/main.c @@ -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); diff --git a/drivers/pci/pci-driver.c b/drivers/pci/pci-driver.c index 685fbf0..ce220b1 100644 --- a/drivers/pci/pci-driver.c +++ b/drivers/pci/pci-driver.c @@ -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; } -- 2.7.4