diff options
| author | Bjorn Helgaas <bhelgaas@google.com> | 2012-07-05 16:29:52 -0600 |
|---|---|---|
| committer | Bjorn Helgaas <bhelgaas@google.com> | 2012-07-05 16:29:52 -0600 |
| commit | a7711ba1090a5fa1caa6e07182ac4e8e1c0da695 (patch) | |
| tree | f5682057d40e557e3816a977fbf9a4762d6716e2 /drivers/pci/pci.c | |
| parent | 85a00dd391d2de1e177c5ad8db5672428934ac20 (diff) | |
| parent | db288c9c5f9db45610dab3940377625132b4af41 (diff) | |
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()
Diffstat (limited to 'drivers/pci/pci.c')
| -rw-r--r-- | drivers/pci/pci.c | 19 |
1 files changed, 18 insertions, 1 deletions
diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c index e091b0afdc8a..f3ea977a5b1b 100644 --- a/drivers/pci/pci.c +++ b/drivers/pci/pci.c @@ -638,6 +638,19 @@ 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 * @dev: PCI device to handle. * @state: State to put the device into. @@ -727,7 +740,7 @@ int __pci_complete_power_transition(struct pci_dev *dev, pci_power_t state) { int ret; - if (state < PCI_D0) + if (state <= PCI_D0) return -EINVAL; ret = pci_platform_power_transition(dev, state); /* 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; + /* Check if we're already there */ + if (dev->current_state == state) + return 0; + __pci_start_power_transition(dev, state); /* This device is quirked not to be put into D3, so |