Man page 9 : __blk_end_bidi_request

__blk_end_bidi_request - Complete a bidi request with queue lock held

bool __blk_end_bidi_request(struct request *  rq , int  error , unsigned int  nr_bytes , unsigned int  bidi_bytes );

rq
    the request to complete

error
     0 for success, < 0 for error

nr_bytes
    number of bytes to complete rq

bidi_bytes
    number of bytes to complete rq->next_rq

Identical to blk_end_bidi_request except that queue lock is assumed to be locked on entry and remains so on return.

false - we are done with this request true - still buffers pending for this request