On Mon, 28 Jan 2013, Aaron Lu wrote: > > Someone just asked about the default autosuspend delay, and I realized > > your patch series doesn't set one. Since we don't know the properties > > of the disk drive at this point (or even whether the device is a disk > > drive), the only safe course is to call > > > > pm_runtime_set_autosuspend_delay(&sdev->sdev_gendev, -1); > > > > before calling blk_pm_runtime_init(). Then autosuspends will be > > prevented until userspace writes a non-negative value into the device's > > control/autosuspend_delay_ms file. > > Shall we do it inside blk_pm_runtime_init? This way, we do not need to > do it for every driver. And for drivers that do know a proper value for > autosuspend delay, they can call pm_runtime_set_autosuspend_delay > somewhere after blk_pm_runtime_init. Yes, that seems like a good approach. Be sure to mention it in the kerneldoc. 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
