diff options
Diffstat (limited to 'block')
| -rw-r--r-- | block/blk-merge.c | 15 |
1 files changed, 8 insertions, 7 deletions
diff --git a/block/blk-merge.c b/block/blk-merge.c index 22467f475ab4..1c9d4f0f96ea 100644 --- a/block/blk-merge.c +++ b/block/blk-merge.c @@ -180,7 +180,7 @@ static unsigned get_max_segment_size(struct request_queue *q, */ static bool bvec_split_segs(struct request_queue *q, struct bio_vec *bv, unsigned *nsegs, unsigned *last_seg_size, - unsigned *front_seg_size, unsigned *sectors) + unsigned *front_seg_size, unsigned *sectors, unsigned max_segs) { unsigned len = bv->bv_len; unsigned total_len = 0; @@ -190,7 +190,7 @@ static bool bvec_split_segs(struct request_queue *q, struct bio_vec *bv, * Multi-page bvec may be too big to hold in one segment, so the * current bvec has to be splitted as multiple segments. */ - while (len && new_nsegs + *nsegs < queue_max_segments(q)) { + while (len && new_nsegs + *nsegs < max_segs) { seg_size = get_max_segment_size(q, bv->bv_offset + total_len); seg_size = min(seg_size, len); @@ -240,6 +240,7 @@ static struct bio *blk_bio_segment_split(struct request_queue *q, bool do_split = true; struct bio *new = NULL; const unsigned max_sectors = get_max_io_size(q, bio); + const unsigned max_segs = queue_max_segments(q); bio_for_each_bvec(bv, bio, iter) { /* @@ -254,14 +255,14 @@ static struct bio *blk_bio_segment_split(struct request_queue *q, * Consider this a new segment if we're splitting in * the middle of this vector. */ - if (nsegs < queue_max_segments(q) && + if (nsegs < max_segs && sectors < max_sectors) { /* split in the middle of bvec */ bv.bv_len = (max_sectors - sectors) << 9; bvec_split_segs(q, &bv, &nsegs, &seg_size, &front_seg_size, - §ors); + §ors, max_segs); } goto split; } @@ -283,7 +284,7 @@ static struct bio *blk_bio_segment_split(struct request_queue *q, continue; } new_segment: - if (nsegs == queue_max_segments(q)) + if (nsegs == max_segs) goto split; bvprv = bv; @@ -296,7 +297,7 @@ new_segment: if (nsegs == 1 && seg_size > front_seg_size) front_seg_size = seg_size; } else if (bvec_split_segs(q, &bv, &nsegs, &seg_size, - &front_seg_size, §ors)) { + &front_seg_size, §ors, max_segs)) { goto split; } } @@ -415,7 +416,7 @@ new_segment: bvprv = bv; prev = 1; bvec_split_segs(q, &bv, &nr_phys_segs, &seg_size, - &front_seg_size, NULL); + &front_seg_size, NULL, UINT_MAX); } bbio = bio; } |