Em Thu, 15 Dec 2016 10:09:53 -0700 Shuah Khan <shuahkh@xxxxxxxxxxxxxxx> escreveu: > On 12/15/2016 09:28 AM, Hans Verkuil wrote: > > On 15/12/16 17:06, Shuah Khan wrote: > > > > I think this will work for interface entities, but for subdev entities this > > certainly won't work. Unbinding subdevs should be blocked (just set > > suppress_bind_attrs to true in all subdev drivers). Most top-level drivers > > have pointers to subdev data, so unbinding them will just fail horribly. > > > > Yes that is an option. I did something similar for au0828 and snd_usb_audio > case, so the module that registers the media_device can't unbound until the > other driver. If au0828 registers media_device, it becomes the owner and if > it gets unbound ioctls will start to see problems. > > What this means though is that drivers can't be unbound easily. But that is > a small price to pay compared to the problems we will see if a driver is > unbound when its entities are still in use. Also, unsetting bind_attrs has > to be done as well, otherwise we can never unbind any driver. I don't think suppress_bind_attrs will work on USB drivers, as the device can be physically removed. Thanks, Mauro -- To unsubscribe from this list: send the line "unsubscribe linux-media" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
