On Mon, 2 Aug 2010, Oliver Neukum wrote: > Am Mittwoch, 28. Juli 2010, 23:12:39 schrieb Alan Stern: > > > > This patch (as1400) adds runtime-PM support to usb-storage. It > > utilizes the SCSI layer's runtime-PM implementation, so its scope is > > limited. Currently the only effect is that disk-like devices (such as > > card readers or flash drives) will be autosuspended if they aren't > > mounted and their device files aren't open. This would apply, for > > example, to card readers that don't contain a memory card. > > So it will autosuspend devices that do contain a medium, which > is not mounted? This is a bit problematic, as some card readers > will report a medium change upon resumption? > > How does user space deal with this? For the most part it won't matter. It's rare to open a card reader's device file without mounting it. If it does matter, the user can disable autosuspend (or more accurately, avoid enabling it) for that device. Alan Stern -- To unsubscribe from this list: send the line "unsubscribe linux-scsi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
