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-rw-r--r--drivers/acpi/device_pm.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/acpi/device_pm.c b/drivers/acpi/device_pm.c
index 164d609d7c9..dd314ef9bff 100644
--- a/drivers/acpi/device_pm.c
+++ b/drivers/acpi/device_pm.c
@@ -355,6 +355,9 @@ int acpi_bus_update_power(acpi_handle handle, int *state_p)
if (result)
return result;
+ if (state == ACPI_STATE_UNKNOWN)
+ state = ACPI_STATE_D0;
+
result = acpi_device_set_power(device, state);
if (!result && state_p)
*state_p = state;