On Thu, 12 Jan 2012, Oliver Neukum wrote: > Am Donnerstag, 12. Januar 2012, 03:01:04 schrieb Alan Stern: > > Besides, what's usb-storage going to do if a CD drive does send a > > wakeup request? usb-storage doesn't initiate any SCSI commands on its > > own. All that will happen is the autosuspend timer will expire and the > > drive will be suspended again. > > The answer would clearly be to do nothing but for another reason. > Storage is an interface driver and we can never rule out that > another or indeed multiple interfaces caused a wakeup. > > That argues for solving this is at the device level. Should we > make a file in sysfs poll()able for wakeup? Indeed, I think it would make a lot of sense for /sys/.../power/runtime_status to be pollable. This would require it to be present always, not just when CONFIG_PM_ADVANCED_DEBUG is on. Rafael, any objection? Alan Stern -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
