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authorRafael J. Wysocki <rafael.j.wysocki@intel.com>2017-12-16 04:05:48 +0300
committerRafael J. Wysocki <rafael.j.wysocki@intel.com>2017-12-16 04:05:48 +0300
commitc51a024e3913e9dbaf4dfcb9aaba825668a89ace (patch)
tree9772af495ced0bde0d3c58b6e6fb5b395b3afae9 /drivers/pci/pci-driver.c
parent3487972d7fa6c5143951436ada5933dcf0ec659d (diff)
parent34fb8f0ba9ceea88e116688f9f53e3802c38aafb (diff)
downloadlinux-c51a024e3913e9dbaf4dfcb9aaba825668a89ace.tar.xz
Merge back PM core material for v4.16.
Diffstat (limited to 'drivers/pci/pci-driver.c')
-rw-r--r--drivers/pci/pci-driver.c19
1 files changed, 17 insertions, 2 deletions
diff --git a/drivers/pci/pci-driver.c b/drivers/pci/pci-driver.c
index 945099d49f8f..9e53e51b91f3 100644
--- a/drivers/pci/pci-driver.c
+++ b/drivers/pci/pci-driver.c
@@ -699,7 +699,7 @@ static void pci_pm_complete(struct device *dev)
pm_generic_complete(dev);
/* Resume device if platform firmware has put it in reset-power-on */
- if (dev->power.direct_complete && pm_resume_via_firmware()) {
+ if (pm_runtime_suspended(dev) && pm_resume_via_firmware()) {
pci_power_t pre_sleep_state = pci_dev->current_state;
pci_update_current_state(pci_dev, pci_dev->current_state);
@@ -783,8 +783,10 @@ 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))
+ if (dev_pm_smart_suspend_and_suspended(dev)) {
+ dev->power.may_skip_resume = true;
return 0;
+ }
if (pci_has_legacy_pm_support(pci_dev))
return pci_legacy_suspend_late(dev, PMSG_SUSPEND);
@@ -838,6 +840,16 @@ static int pci_pm_suspend_noirq(struct device *dev)
Fixup:
pci_fixup_device(pci_fixup_suspend_late, pci_dev);
+ /*
+ * If the target system sleep state is suspend-to-idle, it is sufficient
+ * to check whether or not the device's wakeup settings are good for
+ * runtime PM. Otherwise, the pm_resume_via_firmware() check will cause
+ * 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);
+
return 0;
}
@@ -847,6 +859,9 @@ static int pci_pm_resume_noirq(struct device *dev)
struct device_driver *drv = dev->driver;
int error = 0;
+ if (dev_pm_may_skip_resume(dev))
+ return 0;
+
/*
* Devices with DPM_FLAG_SMART_SUSPEND may be left in runtime suspend
* during system suspend, so update their runtime PM status to "active"