1 files changed, 11 insertions, 0 deletions

diff --git a/include/linux/bio.h b/include/linux/bio.h
index d6791bba8264..5a4d39b4686b 100644
--- a/include/linux/bio.h
+++ b/include/linux/bio.h
@@ -250,6 +250,17 @@ static inline unsigned bio_segments(struct bio *bio)
         struct bio_vec bv;
         struct bvec_iter iter;
 
+        /*
+         * We special case discard/write same, because they interpret bi_size
+         * differently:
+         */
+
+        if (bio->bi_rw & REQ_DISCARD)
+                return 1;
+
+        if (bio->bi_rw & REQ_WRITE_SAME)
+                return 1;
+
         bio_for_each_segment(bv, bio, iter)
                 segs++;