USB_HUB_CLEAR_TT_BUF(9)                   USB Core APIs                   USB_HUB_CLEAR_TT_BUF(9)



NAME
       usb_hub_clear_tt_buffer - clear control/bulk TT state in high speed hub

SYNOPSIS
       int usb_hub_clear_tt_buffer(struct urb * urb);

ARGUMENTS
       urb
           an URB associated with the failed or incomplete split transaction

DESCRIPTION
       High speed HCDs use this to tell the hub driver that some split control or bulk
       transaction failed in a way that requires clearing internal state of a transaction
       translator. This is normally detected (and reported) from interrupt context.

       It may not be possible for that hub to handle additional full (or low) speed transactions
       until that state is fully cleared out.

RETURN
       0 if successful. A negative error code otherwise.

COPYRIGHT
Kernel Hackers Manual 4.8.                 January 2017                   USB_HUB_CLEAR_TT_BUF(9)