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| author | David Brownell <david-b@pacbell.net> | 2008-02-22 21:41:51 -0800 |
|---|---|---|
| committer | Len Brown <len.brown@intel.com> | 2008-02-23 01:29:34 -0500 |
| commit | 583c377f1d58e705f75d8d5648ab41722be1ebca (patch) | |
| tree | 102d94c4bb214eed73b3940060763c4401c0a4e1 /drivers/pci | |
| parent | 39273b58a409cd6d65c9732bdca00bacd1626672 (diff) | |
| download | linux-3.10-583c377f1d58e705f75d8d5648ab41722be1ebca.tar.gz linux-3.10-583c377f1d58e705f75d8d5648ab41722be1ebca.tar.bz2 linux-3.10-583c377f1d58e705f75d8d5648ab41722be1ebca.zip | |
ACPI: acpi_pci_set_power_state() cleanups
Minor cleanups to acpi_pci_set_power_state(): use the ACPI and PCI
state symbols to make clear that a mapping is being done between PCI
and ACPI states, instead of using magic numbers. For paranoia's sake,
report any errors. Save five bytes (x86_64) too.
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Len Brown <len.brown@intel.com>
Diffstat (limited to 'drivers/pci')
| -rw-r--r-- | drivers/pci/pci-acpi.c | 24 |
1 files changed, 16 insertions, 8 deletions
diff --git a/drivers/pci/pci-acpi.c b/drivers/pci/pci-acpi.c index 4a23654184f..72f7476930c 100644 --- a/drivers/pci/pci-acpi.c +++ b/drivers/pci/pci-acpi.c @@ -272,21 +272,29 @@ static int acpi_pci_set_power_state(struct pci_dev *dev, pci_power_t state) { acpi_handle handle = DEVICE_ACPI_HANDLE(&dev->dev); acpi_handle tmp; - static int state_conv[] = { - [0] = 0, - [1] = 1, - [2] = 2, - [3] = 3, - [4] = 3 + static const u8 state_conv[] = { + [PCI_D0] = ACPI_STATE_D0, + [PCI_D1] = ACPI_STATE_D1, + [PCI_D2] = ACPI_STATE_D2, + [PCI_D3hot] = ACPI_STATE_D3, + [PCI_D3cold] = ACPI_STATE_D3 }; - int acpi_state = state_conv[(int __force) state]; if (!handle) return -ENODEV; /* If the ACPI device has _EJ0, ignore the device */ if (ACPI_SUCCESS(acpi_get_handle(handle, "_EJ0", &tmp))) return 0; - return acpi_bus_set_power(handle, acpi_state); + + switch (state) { + case PCI_D0: + case PCI_D1: + case PCI_D2: + case PCI_D3hot: + case PCI_D3cold: + return acpi_bus_set_power(handle, state_conv[state]); + } + return -EINVAL; } |