On Mon, 20 Apr 2015, Roger Quadros wrote: > > I don't understand this. Why do you want to defer the add/remove if > > the device is OTG? Don't host controller drivers expect these things > > to execute synchronously? > > Sorry for the wrong information. We actually defer only the add as the > OTG state machine might not yet be in Host ready mode. > The remove is always synchronous and we ensure that the HCD is removed > when usb_otg_unregister_hcd() returns. That's okay then, but it does leave one potential hole. What happens if usb_add_hcd() is deferred for so long that usb_remove_hcd() gets called before the add can complete? Alan Stern -- 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
