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Merge branch 'pm-pci'

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* pm-pci:
  PCI / PM: Fix native PME handling during system suspend/resume
  PCI / PM: Restore PME Enable after config space restoration
This commit is contained in:
Rafael J. Wysocki 2017-07-14 13:15:49 +02:00
commit ec4b8ddcd3
4 changed files with 24 additions and 30 deletions
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16
drivers/pci/pci.c
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@ -1801,7 +1801,11 @@ static void __pci_pme_active(struct pci_dev *dev, bool enable)
pci_write_config_word(dev, dev->pm_cap + PCI_PM_CTRL, pmcsr);
}
static void pci_pme_restore(struct pci_dev *dev)
/**
* pci_pme_restore - Restore PME configuration after config space restore.
* @dev: PCI device to update.
*/
void pci_pme_restore(struct pci_dev *dev)
{
u16 pmcsr;
@ -1811,6 +1815,7 @@ static void pci_pme_restore(struct pci_dev *dev)
pci_read_config_word(dev, dev->pm_cap + PCI_PM_CTRL, &pmcsr);
if (dev->wakeup_prepared) {
pmcsr |= PCI_PM_CTRL_PME_ENABLE;
pmcsr &= ~PCI_PM_CTRL_PME_STATUS;
} else {
pmcsr &= ~PCI_PM_CTRL_PME_ENABLE;
pmcsr |= PCI_PM_CTRL_PME_STATUS;
@ -1907,14 +1912,9 @@ int pci_enable_wake(struct pci_dev *dev, pci_power_t state, bool enable)
{
int ret = 0;
/*
* Don't do the same thing twice in a row for one device, but restore
* PME Enable in case it has been updated by config space restoration.
*/
if (!!enable == !!dev->wakeup_prepared) {
pci_pme_restore(dev);
/* Don't do the same thing twice in a row for one device. */
if (!!enable == !!dev->wakeup_prepared)
return 0;
}
/*
* According to "PCI System Architecture" 4th ed. by Tom Shanley & Don