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authorDavid Shaohua Li <shaohua.li@intel.com>2005-03-19 00:16:18 -0500
committerLen Brown <len.brown@intel.com>2005-07-11 23:47:06 -0400
commitb913100d7304ea9596d8d85ab5f3ae04bd2b0ddb (patch)
tree270925a02dd83264fd5bd3a47fc39453798c39d5 /drivers/acpi/bus.c
parent0f64474b8f7f1f7f3af5b24ef997baa35f923509 (diff)
[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.c8
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);