On Tue, 2007-09-18 at 16:15 +0200, Oliver Neukum wrote: > Am Dienstag 18 September 2007 schrieb James Bottomley: > > On Tue, 2007-09-18 at 10:32 +0200, Oliver Neukum wrote: > > > which function should a lldd call to make the scsi layer flush > > > a device's buffers and spin it down? Which kind of locking is > > > required? > > > > Depends on the context. Is this for suspend? If so it's done > > automatically by the sd driver, but the device has to be marked for it > > in the manage_start_stop attributes. > > It is for runtime power management. We've gotten a bug report about > a drive enclosure that doesn't properly park heads if the usb device is > simply suspended. Apparently it simply cuts power so the cache can > be lost, too. But even for runtime, if you want to suspend the device, shouldn't you be calling the suspend methods in the device tree? James - 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
