Merge branch 'for-4.8/drivers' of git://git.kernel.dk/linux-block

[karo-tx-linux.git] / block / blk-merge.c

diff --git a/block/blk-merge.c b/block/blk-merge.c
index 9772308a839188aba5410deeacf382f64e3addb1..41cbd48789582d06e9933576782850ef793f3bde 100644 (file)
--- a/block/blk-merge.c
+++ b/block/blk-merge.c
@@ -500,7 +500,7 @@ int ll_back_merge_fn(struct request_queue *q, struct request *req,
            integrity_req_gap_back_merge(req, bio))
                return 0;
        if (blk_rq_sectors(req) + bio_sectors(bio) >
-           blk_rq_get_max_sectors(req)) {
+           blk_rq_get_max_sectors(req, blk_rq_pos(req))) {
                req->cmd_flags |= REQ_NOMERGE;
                if (req == q->last_merge)
                        q->last_merge = NULL;
@@ -524,7 +524,7 @@ int ll_front_merge_fn(struct request_queue *q, struct request *req,
            integrity_req_gap_front_merge(req, bio))
                return 0;
        if (blk_rq_sectors(req) + bio_sectors(bio) >
-           blk_rq_get_max_sectors(req)) {
+           blk_rq_get_max_sectors(req, bio->bi_iter.bi_sector)) {
                req->cmd_flags |= REQ_NOMERGE;
                if (req == q->last_merge)
                        q->last_merge = NULL;
@@ -570,7 +570,7 @@ static int ll_merge_requests_fn(struct request_queue *q, struct request *req,
         * Will it become too large?
         */
        if ((blk_rq_sectors(req) + blk_rq_sectors(next)) >
-           blk_rq_get_max_sectors(req))
+           blk_rq_get_max_sectors(req, blk_rq_pos(req)))
                return 0;
 
        total_phys_segments = req->nr_phys_segments + next->nr_phys_segments;
@@ -743,6 +743,12 @@ int attempt_front_merge(struct request_queue *q, struct request *rq)
 int blk_attempt_req_merge(struct request_queue *q, struct request *rq,
                          struct request *next)
 {
+       struct elevator_queue *e = q->elevator;
+
+       if (e->type->ops.elevator_allow_rq_merge_fn)
+               if (!e->type->ops.elevator_allow_rq_merge_fn(q, rq, next))
+                       return 0;
+
        return attempt_merge(q, rq, next);
 }