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Editing: plugin_usb.py
from . import base from .decorators import * import tuned.logs from tuned.utils.commands import commands import glob import errno log = tuned.logs.get() class USBPlugin(base.Plugin): """ `usb`:: Sets autosuspend timeout of USB devices to the value specified by the [option]`autosuspend` option in seconds. If the [option]`devices` option is specified, the [option]`autosuspend` option applies to only the USB devices specified, otherwise it applies to all USB devices. + The value `0` means that autosuspend is disabled. + .To turn off USB autosuspend for USB devices `1-1` and `1-2` ==== ---- [usb] devices=1-1,1-2 autosuspend=0 ---- ==== """ def _init_devices(self): self._devices_supported = True self._free_devices = set() self._assigned_devices = set() for device in self._hardware_inventory.get_devices("usb").match_property("DEVTYPE", "usb_device"): self._free_devices.add(device.sys_name) self._cmd = commands() def _get_device_objects(self, devices): return [self._hardware_inventory.get_device("usb", x) for x in devices] @classmethod def _get_config_options(self): return { "autosuspend" : None, } def _instance_init(self, instance): instance._has_static_tuning = True instance._has_dynamic_tuning = False def _instance_cleanup(self, instance): pass def _autosuspend_sysfile(self, device): return "/sys/bus/usb/devices/%s/power/autosuspend" % device @command_set("autosuspend", per_device=True) def _set_autosuspend(self, value, device, sim, remove): enable = self._option_bool(value) if enable is None: return None val = "1" if enable else "0" if not sim: sys_file = self._autosuspend_sysfile(device) self._cmd.write_to_file(sys_file, val, \ no_error = [errno.ENOENT] if remove else False) return val @command_get("autosuspend") def _get_autosuspend(self, device, ignore_missing=False): sys_file = self._autosuspend_sysfile(device) return self._cmd.read_file(sys_file, no_error=ignore_missing).strip()
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