diff options
| -rw-r--r-- | drivers/acpi/bus.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/acpi/bus.c b/drivers/acpi/bus.c index 07a20ee3e69..1f0d457ecbc 100644 --- a/drivers/acpi/bus.c +++ b/drivers/acpi/bus.c @@ -306,6 +306,12 @@ int acpi_device_set_power(struct acpi_device *device, int state) * a lower-powered state. */ if (state < device->power.state) { + if (device->power.state >= ACPI_STATE_D3_HOT && + state != ACPI_STATE_D0) { + printk(KERN_WARNING PREFIX + "Cannot transition to non-D0 state from D3\n"); + return -ENODEV; + } if (device->power.flags.power_resources) { result = acpi_power_transition(device, state); if (result) |