On Mon, 29 Mar 2010, Oliver Neukum wrote: > > For hiddev, this causes a problem, as you introduced BKL into > > hiddev_connect() exactly because of the proper dependency -- we have the > > BKL there to avoid race after usb_register_dev() -- once the device node > > has been created, open() could happen on it. > > Hi, > > it seems to me you cannot deadlock with the BKL and an rwsem, > as BKL will be dropped if a task blocks on the rwsem. Ah, right you are. > This is not a nice feature of the BKL to use. Do you have an alternative > idea? Not right now, without introducing additional lock into USB core or redesigning the hiddev node registration completely. Hmmm ... Thanks, -- Jiri Kosina SUSE Labs, Novell Inc. -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
