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| author | Christoph Hellwig <hch@infradead.org> | 2014-02-21 00:32:38 +0100 |
|---|---|---|
| committer | Jens Axboe <axboe@fb.com> | 2014-02-21 17:58:49 +0100 |
| commit | d6a25b31315327eef7785b895c354cc45c3f3742 (patch) | |
| tree | f32ed70506c097efa67526ed4a1eb63482056046 /include | |
| parent | blk-mq: merge blk_mq_insert_request and blk_mq_run_request (diff) | |
| download | linux-d6a25b31315327eef7785b895c354cc45c3f3742.tar.xz linux-d6a25b31315327eef7785b895c354cc45c3f3742.zip | |
blk-mq: support partial I/O completions
Add a new blk_mq_end_io_partial function to partially complete requests
as needed by the SCSI layer. We do this by reusing blk_update_request
to advance the bio instead of having a simplified version of it in
the blk-mq code.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@fb.com>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/blk-mq.h | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/include/linux/blk-mq.h b/include/linux/blk-mq.h index ff28fe37ddda..2ff2e8d982be 100644 --- a/include/linux/blk-mq.h +++ b/include/linux/blk-mq.h @@ -133,7 +133,13 @@ struct blk_mq_hw_ctx *blk_mq_map_queue(struct request_queue *, const int ctx_ind struct blk_mq_hw_ctx *blk_mq_alloc_single_hw_queue(struct blk_mq_reg *, unsigned int); void blk_mq_free_single_hw_queue(struct blk_mq_hw_ctx *, unsigned int); -void blk_mq_end_io(struct request *rq, int error); +bool blk_mq_end_io_partial(struct request *rq, int error, + unsigned int nr_bytes); +static inline void blk_mq_end_io(struct request *rq, int error) +{ + bool done = !blk_mq_end_io_partial(rq, error, blk_rq_bytes(rq)); + BUG_ON(!done); +} void blk_mq_complete_request(struct request *rq); |