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PCI/PM: Fold __pci_start_power_transition() into its caller

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Because pci_power_up() has become the only caller of
__pci_start_power_transition(), there is no need for the latter to
be a separate function any more, so fold it into the former, drop a
redundant check and reduce the number of lines of code somewhat.

Code rearrangement, no intentional functional impact.

Link: https://lore.kernel.org/r/3458080.lsoDbfkST9@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 11:29:16 +01:00 committed by Bjorn Helgaas
parent adfac8f6b7
commit dc2256b073
1 changed files with 19 additions and 31 deletions
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50
drivers/pci/pci.c
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@ -1002,43 +1002,31 @@ void pci_wakeup_bus(struct pci_bus *bus)
pci_walk_bus(bus, pci_wakeup, NULL);
}
/**
* __pci_start_power_transition - Start power transition of a PCI device
* @dev: PCI device to handle.
* @state: State to put the device into.
*/
static void __pci_start_power_transition(struct pci_dev *dev, pci_power_t state)
{
if (state == PCI_D0) {
pci_platform_power_transition(dev, PCI_D0);
/*
* Mandatory power management transition delays, see
* PCI Express Base Specification Revision 2.0 Section
* 6.6.1: Conventional Reset. Do not delay for
* devices powered on/off by corresponding bridge,
* because have already delayed for the bridge.
*/
if (dev->runtime_d3cold) {
if (dev->d3cold_delay && !dev->imm_ready)
msleep(dev->d3cold_delay);
/*
* When powering on a bridge from D3cold, the
* whole hierarchy may be powered on into
* D0uninitialized state, resume them to give
* them a chance to suspend again
*/
pci_wakeup_bus(dev->subordinate);
}
}
}
/**
* 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);
pci_platform_power_transition(dev, PCI_D0);
/*
* Mandatory power management transition delays, see PCI Express Base
* Specification Revision 2.0 Section 6.6.1: Conventional Reset. Do not
* delay for devices powered on/off by corresponding bridge, because
* have already delayed for the bridge.
*/
if (dev->runtime_d3cold) {
if (dev->d3cold_delay && !dev->imm_ready)
msleep(dev->d3cold_delay);
/*
* When powering on a bridge from D3cold, the whole hierarchy
* may be powered on into D0uninitialized state, resume them to
* give them a chance to suspend again
*/
pci_wakeup_bus(dev->subordinate);
}
return pci_raw_set_power_state(dev, PCI_D0);
}