usb/core/urb.c

238  * describing that request to the USB subsystem.  Request completion will
248  * the particular kind of transfer, although they will not initialize
252  * will be called exactly once, when the USB core and Host Controller Driver
267  * Not all isochronous transfer scheduling policies will work, but most
281  * usb_iso_packet_descriptor's status field will return -EXDEV.  If this
320  * configuration/alt setting request will fail.  Therefore, submissions to
388 	 * will be required to set urb->ep directly and we will eliminate  in usb_submit_urb()
594  * Successful cancellation means termination of @urb will be expedited
595  * and the completion handler will be called with a status code
608  * Success is indicated by returning -EINPROGRESS, at which time the URB will
610  * eventually called, the completion function will see @urb->status ==
613  * Unlinking will fail when @urb is not currently "linked" (i.e., it was
634  * will not restart until all its unlinked URBs have been fully retired,
650  * received will generate a -EREMOTEIO error if and only if the
657  * is quite likely that the status stage of the transfer will not take
678  * upon return all completion handlers will have finished and the URB
679  * will be totally idle and available for reuse.  These features make
682  * the completion handler will see urb->status == -ENOENT.
684  * While the routine is running, attempts to resubmit the URB will fail
686  * tries to resubmit, it will not succeed and the URB will become idle.
725  * upon return all completion handlers will have finished and the URB
726  * will be totally idle and cannot be reused.  These features make
729  * the completion handler will see urb->status == -ENOENT.
731  * After and while the routine runs, attempts to resubmit the URB will fail
733  * tries to resubmit, it will not succeed and the URB will become idle.
780  * After the routine has run, attempts to resubmit the URB will fail
782  * tries to resubmit, it will not succeed and the URB will become idle.
802  * with guarantee that no completer callbacks will take place from the
821 			/* this will unanchor the URB */  in usb_kill_anchored_urbs()
840  * from the back of the queue. Newly added URBs will also be
860 			/* this will unanchor the URB */  in usb_poison_anchored_urbs()
972  * This will take the oldest urb from an anchor,