From d6a25b31315327eef7785b895c354cc45c3f3742 Mon Sep 17 00:00:00 2001 From: Christoph Hellwig Date: Thu, 20 Feb 2014 15:32:38 -0800 Subject: 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 Signed-off-by: Jens Axboe --- include/linux/blk-mq.h | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-) (limited to 'include/linux/blk-mq.h') 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); -- cgit v1.2.3