blk_update_request — Special helper function for request stacking drivers
bool blk_update_request ( | struct request * req, |
| int error, | |
unsigned int nr_bytes); |
reqthe request being processed
error
0 for success, < 0 for error
nr_bytes
number of bytes to complete req
Ends I/O on a number of bytes attached to req, but doesn't complete
the request structure even if req doesn't have leftover.
If req has leftover, sets it up for the next range of segments.
This special helper function is only for request stacking drivers (e.g. request-based dm) so that they can handle partial completion. Actual device drivers should use blk_end_request instead.
Passing the result of blk_rq_bytes as nr_bytes guarantees
false return from this function.