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| author | Michal Marek <mmarek@suse.cz> | 2014-01-02 14:02:06 +0100 |
|---|---|---|
| committer | Michal Marek <mmarek@suse.cz> | 2014-01-02 14:02:06 +0100 |
| commit | 37e2c2a775fc887acd1432908478dfd532f7f00f (patch) | |
| tree | e51ebc699d8e262fd47e0913be6a711cb1a7b565 /block/blk-merge.c | |
| parent | deb-pkg: Inhibit initramfs builders if CONFIG_BLK_DEV_INITRD is not set (diff) | |
| parent | Linux 3.13-rc1 (diff) | |
| download | linux-37e2c2a775fc887acd1432908478dfd532f7f00f.tar.xz linux-37e2c2a775fc887acd1432908478dfd532f7f00f.zip | |
Merge commit v3.13-rc1 into kbuild/misc
Diffstat (limited to 'block/blk-merge.c')
| -rw-r--r-- | block/blk-merge.c | 17 |
1 files changed, 14 insertions, 3 deletions
diff --git a/block/blk-merge.c b/block/blk-merge.c index 5f2448253797..1ffc58977835 100644 --- a/block/blk-merge.c +++ b/block/blk-merge.c @@ -308,6 +308,17 @@ int ll_front_merge_fn(struct request_queue *q, struct request *req, return ll_new_hw_segment(q, req, bio); } +/* + * blk-mq uses req->special to carry normal driver per-request payload, it + * does not indicate a prepared command that we cannot merge with. + */ +static bool req_no_special_merge(struct request *req) +{ + struct request_queue *q = req->q; + + return !q->mq_ops && req->special; +} + static int ll_merge_requests_fn(struct request_queue *q, struct request *req, struct request *next) { @@ -319,7 +330,7 @@ static int ll_merge_requests_fn(struct request_queue *q, struct request *req, * First check if the either of the requests are re-queued * requests. Can't merge them if they are. */ - if (req->special || next->special) + if (req_no_special_merge(req) || req_no_special_merge(next)) return 0; /* @@ -416,7 +427,7 @@ static int attempt_merge(struct request_queue *q, struct request *req, if (rq_data_dir(req) != rq_data_dir(next) || req->rq_disk != next->rq_disk - || next->special) + || req_no_special_merge(next)) return 0; if (req->cmd_flags & REQ_WRITE_SAME && @@ -515,7 +526,7 @@ bool blk_rq_merge_ok(struct request *rq, struct bio *bio) return false; /* must be same device and not a special request */ - if (rq->rq_disk != bio->bi_bdev->bd_disk || rq->special) + if (rq->rq_disk != bio->bi_bdev->bd_disk || req_no_special_merge(rq)) return false; /* only merge integrity protected bio into ditto rq */ |