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| author | Aaron Lu <aaron.lu@intel.com> | 2013-08-03 21:13:22 +0200 |
|---|---|---|
| committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2013-08-03 21:13:22 +0200 |
| commit | 593298e68a3a53bd2fe942244250dfef4d68d477 (patch) | |
| tree | 9988d425ae6beb0c6326a61b791d97df89fd259b | |
| parent | 7b4e0c4ac1809eab6fcfe6818ec8b70be79b41bc (diff) | |
| download | linux-stable-593298e68a3a53bd2fe942244250dfef4d68d477.tar.gz linux-stable-593298e68a3a53bd2fe942244250dfef4d68d477.tar.bz2 linux-stable-593298e68a3a53bd2fe942244250dfef4d68d477.zip | |
ACPI / PM: Add state information to error message in acpi_device_set_power()
The state information can be useful to know what the problem is when
an error message about a device can not being set to a higher power
state than its parent appeared, so this patch adds such state
information for both the target state of the device and the current
state of its parent.
Signed-off-by: Aaron Lu <aaron.lu@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
| -rw-r--r-- | drivers/acpi/device_pm.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/drivers/acpi/device_pm.c b/drivers/acpi/device_pm.c index beb9625e8458..59d3202f6b36 100644 --- a/drivers/acpi/device_pm.c +++ b/drivers/acpi/device_pm.c @@ -179,7 +179,9 @@ int acpi_device_set_power(struct acpi_device *device, int state) } if (device->parent && (state < device->parent->power.state)) { dev_warn(&device->dev, - "Cannot transition to a higher-powered state than parent\n"); + "Cannot transition to power state %s for parent in %s\n", + acpi_power_state_string(state), + acpi_power_state_string(device->parent->power.state)); return -ENODEV; } |