diff options
| author | David Shaohua Li <shaohua.li@intel.com> | 2005-03-19 06:16:18 +0100 |
|---|---|---|
| committer | Len Brown <len.brown@intel.com> | 2005-07-12 05:47:06 +0200 |
| commit | b913100d7304ea9596d8d85ab5f3ae04bd2b0ddb (patch) | |
| tree | 270925a02dd83264fd5bd3a47fc39453798c39d5 /drivers/acpi/bus.c | |
| parent | [ACPI] PCI can now get suspend state from firmware (diff) | |
| download | linux-b913100d7304ea9596d8d85ab5f3ae04bd2b0ddb.tar.xz linux-b913100d7304ea9596d8d85ab5f3ae04bd2b0ddb.zip | |
[ACPI] pci_set_power_state() now calls
platform_pci_set_power_state()
and ACPI can answer
http://bugzilla.kernel.org/show_bug.cgi?id=4277
Signed-off-by: David Shaohua Li <shaohua.li@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
Diffstat (limited to 'drivers/acpi/bus.c')
| -rw-r--r-- | drivers/acpi/bus.c | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/drivers/acpi/bus.c b/drivers/acpi/bus.c index 4edff1738579..d77c2307883c 100644 --- a/drivers/acpi/bus.c +++ b/drivers/acpi/bus.c @@ -212,6 +212,12 @@ acpi_bus_set_power ( ACPI_DEBUG_PRINT((ACPI_DB_WARN, "Device is not power manageable\n")); return_VALUE(-ENODEV); } + /* + * Get device's current power state if it's unknown + * This means device power state isn't initialized or previous setting failed + */ + if (device->power.state == ACPI_STATE_UNKNOWN) + acpi_bus_get_power(device->handle, &device->power.state); if (state == device->power.state) { ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device is already at D%d\n", state)); return_VALUE(0); @@ -231,7 +237,7 @@ acpi_bus_set_power ( * On transitions to a high-powered state we first apply power (via * power resources) then evalute _PSx. Conversly for transitions to * a lower-powered state. - */ + */ if (state < device->power.state) { if (device->power.flags.power_resources) { result = acpi_power_transition(device, state); |