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PCI/PM: Use pci_power_up() in pci_set_power_state()

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Make it explicitly clear that the code to put devices into D0 in
pci_set_power_state() and in pci_pm_default_resume_early() is the
same by making the latter use pci_power_up() for transitions into D0.

Code rearrangement, no intentional functional impact.

Link: https://lore.kernel.org/r/2520019.OZ1nXS5aSj@kreacher
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Mika Westerberg <mika.westerberg@linux.intel.com>
This commit is contained in:
Rafael J. Wysocki 2019-11-05 11:27:49 +01:00 committed by Bjorn Helgaas
parent 81cfa5908f
commit adfac8f6b7
2 changed files with 14 additions and 13 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

25
drivers/pci/pci.c
View file

@ -1032,6 +1032,16 @@ static void __pci_start_power_transition(struct pci_dev *dev, pci_power_t state)
}
}
/**
* pci_power_up - Put the given device into D0
* @dev: PCI device to power up
*/
int pci_power_up(struct pci_dev *dev)
{
__pci_start_power_transition(dev, PCI_D0);
return pci_raw_set_power_state(dev, PCI_D0);
}
/**
* __pci_dev_set_current_state - Set current state of a PCI device
* @dev: Device to handle
@ -1117,6 +1127,9 @@ int pci_set_power_state(struct pci_dev *dev, pci_power_t state)
if (dev->current_state == state)
return 0;
if (state == PCI_D0)
return pci_power_up(dev);
/*
* This device is quirked not to be put into D3, so don't put it in
* D3
@ -1124,8 +1137,6 @@ int pci_set_power_state(struct pci_dev *dev, pci_power_t state)
if (state >= PCI_D3hot && (dev->dev_flags & PCI_DEV_FLAGS_NO_D3))
return 0;
__pci_start_power_transition(dev, state);
/*
* To put device in D3cold, we put device into D3hot in native
* way, then put device into D3cold with platform ops
@ -1140,16 +1151,6 @@ int pci_set_power_state(struct pci_dev *dev, pci_power_t state)
}
EXPORT_SYMBOL(pci_set_power_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)
{
__pci_start_power_transition(dev, PCI_D0);
pci_raw_set_power_state(dev, PCI_D0);
}
/**
* pci_choose_state - Choose the power state of a PCI device
* @dev: PCI device to be suspended

2
drivers/pci/pci.h
View file

@ -85,7 +85,7 @@ struct pci_platform_pm_ops {
int pci_set_platform_pm(const struct pci_platform_pm_ops *ops);
void pci_update_current_state(struct pci_dev *dev, pci_power_t state);
void pci_refresh_power_state(struct pci_dev *dev);
void pci_power_up(struct pci_dev *dev);
int pci_power_up(struct pci_dev *dev);
void pci_disable_enabled_device(struct pci_dev *dev);
int pci_finish_runtime_suspend(struct pci_dev *dev);
void pcie_clear_root_pme_status(struct pci_dev *dev);