usb_hub_tt_clear_buffer — clear control/bulk TT state in high speed hub
void usb_hub_tt_clear_buffer (struct usb_device * udev, int pipe);
udevthe device whose split transaction failed
pipeidentifies the endpoint of the failed transaction
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.