On Mon, Jul 28, 2014 at 03:46:32PM +0000, Yuval Mintz wrote: > > Subject: Re: [PATCH 1/3] driver core: enable drivers to use deferred probe > > from > > init > > > > On Mon, Jul 28, 2014 at 03:12:11PM +0000, Yuval Mintz wrote: > > > Perhaps this is a silly question, but what guarantees that the > > > deferred probe list will actually be triggered, e.g., in case the > > > delayed device is the last device in the system? > > > > The dev->init_delayed_probe is used to ensure that we'd add the device to > > the > > deferred probe list once making this a per device thing if the driver has > > the field > > delay_probe set to true. This technically also allows this to be a per > > device thing > > so with some more work we could enable drivers to only enable this for > > specific > > devices but at this point this did not seem required. > > Sorry for not being clear, but I didn't meant 'what guarantees that the device > will be added to the deferred probe', but rather what guarantees that the > deferred workqueue will be scheduled. > > To the best of my knowledge the deferring mechanism works only if one device > is dependent upon another, e.g., for Multi-function devices where one device > probe is dependent upon the others - which are soon-to-be probed.
The workqueue will be kicked when driver_deferred_probe_trigger() gets poked, we do that in the late_initcall(deferred_probe_initcall), it also gets flushed there with a flush_workqueue(deferred_wq). Luis -- To unsubscribe from this list: send the line "unsubscribe linux-scsi" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
