diff options
| author | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2019-11-05 13:29:16 +0300 |
|---|---|---|
| committer | Bjorn Helgaas <bhelgaas@google.com> | 2019-11-21 02:35:48 +0300 |
| commit | dc2256b0735d03664a92a6cb94ea4e564dfa237b (patch) | |
| tree | c63f65ca38325f6ba08ed97ee627ea0d527e554b /drivers/pci/pci.c | |
| parent | adfac8f6b7396b408fa9a8f40ea41112bebb980f (diff) | |
| download | linux-dc2256b0735d03664a92a6cb94ea4e564dfa237b.tar.xz | |
PCI/PM: Fold __pci_start_power_transition() into its caller
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>
Diffstat (limited to 'drivers/pci/pci.c')
| -rw-r--r-- | drivers/pci/pci.c | 48 |
1 files changed, 18 insertions, 30 deletions
diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c index 9f0977d0ac5a..56bc79e33286 100644 --- a/drivers/pci/pci.c +++ b/drivers/pci/pci.c @@ -1003,42 +1003,30 @@ void pci_wakeup_bus(struct pci_bus *bus) } /** - * __pci_start_power_transition - Start power transition of a PCI device - * @dev: PCI device to handle. - * @state: State to put the device into. + * pci_power_up - Put the given device into D0 + * @dev: PCI device to power up */ -static void __pci_start_power_transition(struct pci_dev *dev, pci_power_t state) +int pci_power_up(struct pci_dev *dev) { - if (state == PCI_D0) { - pci_platform_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); /* - * 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. + * 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 */ - 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_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); return pci_raw_set_power_state(dev, PCI_D0); } |