On Tue, 7 Jul 2015, Rui Miguel Silva wrote: > When processing urb list in dummy_timer and an ep goes away, the urb > is giveback with an -EPROTO error. However the same urb can be > enqueued once again and the loop in dummy_timer never get out. I don't understand. Why would dummy_timer behave differently for the second URB submission? It should follow the same logic and return -EPROTO just like the first time. > To fix that, make sure the dummy_hcd is enabled at enqueue time to > avoid adding urb to the urbp list. > To fix that, make sure the dummy_hcd is enabled at enqueue time to > avoid adding urb to the urbp list. This is not the right approach. We want to allow URBs to be enqueued even if the device's upstream port is not enabled. After all, real HCDs allow this. 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
