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Merge branch 'pci/rafael-pci_set_power_state-rebase' into next 

* pci/rafael-pci_set_power_state-rebase:
  PCI / PM: restore the original behavior of pci_set_power_state()
This commit is contained in:
Bjorn Helgaas 2012-07-05 16:29:52 -06:00
parent 85a00dd391 db288c9c5f
commit a7711ba109
3 changed files with 28 additions and 8 deletions
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16
drivers/pci/pci-driver.c
View File

@ -459,16 +459,17 @@ static int pci_restore_standard_config(struct pci_dev *pci_dev)
return 0; return 0;
} }
static void pci_pm_default_resume_early(struct pci_dev *pci_dev)
{
pci_restore_standard_config(pci_dev);
pci_fixup_device(pci_fixup_resume_early, pci_dev);
}
#endif #endif
#ifdef CONFIG_PM_SLEEP #ifdef CONFIG_PM_SLEEP
static void pci_pm_default_resume_early(struct pci_dev *pci_dev)
{
pci_power_up(pci_dev);
pci_restore_state(pci_dev);
pci_fixup_device(pci_fixup_resume_early, pci_dev);
}
/* /*
* Default "suspend" method for devices that have no driver provided suspend, * Default "suspend" method for devices that have no driver provided suspend,
* or not even a driver at all (second part). * or not even a driver at all (second part).
@ -1054,7 +1055,8 @@ static int pci_pm_runtime_resume(struct device *dev)
if (!pm || !pm->runtime_resume) if (!pm || !pm->runtime_resume)
return -ENOSYS; return -ENOSYS;
pci_pm_default_resume_early(pci_dev); pci_restore_standard_config(pci_dev);
pci_fixup_device(pci_fixup_resume_early, pci_dev);
__pci_enable_wake(pci_dev, PCI_D0, true, false); __pci_enable_wake(pci_dev, PCI_D0, true, false);
pci_fixup_device(pci_fixup_resume, pci_dev); pci_fixup_device(pci_fixup_resume, pci_dev);

19
drivers/pci/pci.c
View File

@ -637,6 +637,19 @@ void pci_update_current_state(struct pci_dev *dev, pci_power_t state)
} }
} }
/**
* pci_power_up - Put the given device into D0 forcibly
* @dev: PCI device to power up
*/
void pci_power_up(struct pci_dev *dev)
{
if (platform_pci_power_manageable(dev))
platform_pci_set_power_state(dev, PCI_D0);
pci_raw_set_power_state(dev, PCI_D0);
pci_update_current_state(dev, PCI_D0);
}
/** /**
* pci_platform_power_transition - Use platform to change device power state * pci_platform_power_transition - Use platform to change device power state
* @dev: PCI device to handle. * @dev: PCI device to handle.
@ -727,7 +740,7 @@ int __pci_complete_power_transition(struct pci_dev *dev, pci_power_t state)
{ {
int ret; int ret;
if (state < PCI_D0) if (state <= PCI_D0)
return -EINVAL; return -EINVAL;
ret = pci_platform_power_transition(dev, state); ret = pci_platform_power_transition(dev, state);
/* Power off the bridge may power off the whole hierarchy */ /* Power off the bridge may power off the whole hierarchy */
@ -769,6 +782,10 @@ int pci_set_power_state(struct pci_dev *dev, pci_power_t state)
*/ */
return 0; return 0;
/* Check if we're already there */
if (dev->current_state == state)
return 0;
__pci_start_power_transition(dev, state); __pci_start_power_transition(dev, state);
/* This device is quirked not to be put into D3, so /* This device is quirked not to be put into D3, so

1
drivers/pci/pci.h
View File

@ -67,6 +67,7 @@ struct pci_platform_pm_ops {
extern int pci_set_platform_pm(struct pci_platform_pm_ops *ops); extern int pci_set_platform_pm(struct pci_platform_pm_ops *ops);
extern void pci_update_current_state(struct pci_dev *dev, pci_power_t state); extern void pci_update_current_state(struct pci_dev *dev, pci_power_t state);
extern void pci_power_up(struct pci_dev *dev);
extern void pci_disable_enabled_device(struct pci_dev *dev); extern void pci_disable_enabled_device(struct pci_dev *dev);
extern int pci_finish_runtime_suspend(struct pci_dev *dev); extern int pci_finish_runtime_suspend(struct pci_dev *dev);
extern int __pci_pme_wakeup(struct pci_dev *dev, void *ign); extern int __pci_pme_wakeup(struct pci_dev *dev, void *ign);