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-rw-r--r--block/blk-merge.c8
1 files changed, 8 insertions, 0 deletions
diff --git a/block/blk-merge.c b/block/blk-merge.c
index ffb4aa0ea68b..4d97fb6dd226 100644
--- a/block/blk-merge.c
+++ b/block/blk-merge.c
@@ -382,6 +382,14 @@ unsigned int blk_recalc_rq_segments(struct request *rq)
switch (bio_op(rq->bio)) {
case REQ_OP_DISCARD:
case REQ_OP_SECURE_ERASE:
+ if (queue_max_discard_segments(rq->q) > 1) {
+ struct bio *bio = rq->bio;
+
+ for_each_bio(bio)
+ nr_phys_segs++;
+ return nr_phys_segs;
+ }
+ return 1;
case REQ_OP_WRITE_ZEROES:
return 0;
case REQ_OP_WRITE_SAME: