diff options
Diffstat (limited to 'drivers/pci/pci-acpi.c')
| -rw-r--r-- | drivers/pci/pci-acpi.c | 24 |
1 files changed, 20 insertions, 4 deletions
diff --git a/drivers/pci/pci-acpi.c b/drivers/pci/pci-acpi.c index c8062494009f..5e866b94bcab 100644 --- a/drivers/pci/pci-acpi.c +++ b/drivers/pci/pci-acpi.c @@ -245,11 +245,27 @@ EXPORT_SYMBOL(pci_osc_control_set); * currently we simply return _SxD, if present. */ -static int acpi_pci_choose_state(struct pci_dev *pdev, pm_message_t state) +static pci_power_t acpi_pci_choose_state(struct pci_dev *pdev, + pm_message_t state) { - /* TBD */ - - return -ENODEV; + int acpi_state; + + acpi_state = acpi_pm_device_sleep_state(&pdev->dev, + device_may_wakeup(&pdev->dev), NULL); + if (acpi_state < 0) + return PCI_POWER_ERROR; + + switch (acpi_state) { + case ACPI_STATE_D0: + return PCI_D0; + case ACPI_STATE_D1: + return PCI_D1; + case ACPI_STATE_D2: + return PCI_D2; + case ACPI_STATE_D3: + return PCI_D3hot; + } + return PCI_POWER_ERROR; } static int acpi_pci_set_power_state(struct pci_dev *dev, pci_power_t state) |