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-rw-r--r--block/blk-core.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/block/blk-core.c b/block/blk-core.c
index 134fd34b681f..d0d104268f1a 100644
--- a/block/blk-core.c
+++ b/block/blk-core.c
@@ -3283,6 +3283,8 @@ void blk_rq_bio_prep(struct request_queue *q, struct request *rq,
{
if (bio_has_data(bio))
rq->nr_phys_segments = bio_phys_segments(q, bio);
+ else if (bio_op(bio) == REQ_OP_DISCARD)
+ rq->nr_phys_segments = 1;
rq->__data_len = bio->bi_iter.bi_size;
rq->bio = rq->biotail = bio;