diff --git a/drivers/md/raid5.c b/drivers/md/raid5.c
index 65ae7d8930fc..debf35342ae0 100644
--- a/drivers/md/raid5.c
+++ b/drivers/md/raid5.c
@@ -5690,7 +5690,10 @@ static void make_discard_request(struct mddev *mddev, struct bio *bi)
 {
 	struct r5conf *conf = mddev->private;
 	sector_t logical_sector, last_sector;
+	sector_t first_stripe, last_stripe;
 	struct stripe_head *sh;
+	struct bvec_iter bi_iter;
+	struct bio *orig_bi = bi;
 	int stripe_sectors;
 
 	/* We need to handle this when io_uring supports discard/trim */
@@ -5701,19 +5704,29 @@ static void make_discard_request(struct mddev *mddev, struct bio *bi)
 		/* Skip discard while reshape is happening */
 		return;
 
-	logical_sector = bi->bi_iter.bi_sector & ~((sector_t)RAID5_STRIPE_SECTORS(conf)-1);
-	last_sector = bio_end_sector(bi);
-
-	bi->bi_next = NULL;
-
 	stripe_sectors = conf->chunk_sectors *
 		(conf->raid_disks - conf->max_degraded);
-	logical_sector = DIV_ROUND_UP_SECTOR_T(logical_sector,
-					       stripe_sectors);
-	sector_div(last_sector, stripe_sectors);
+	first_stripe = DIV_ROUND_UP_SECTOR_T(bi->bi_iter.bi_sector,
+					     stripe_sectors);
+	last_stripe = bio_end_sector(bi);
+	sector_div(last_stripe, stripe_sectors);
 
-	logical_sector *= conf->chunk_sectors;
-	last_sector *= conf->chunk_sectors;
+	if (first_stripe >= last_stripe) {
+		bio_endio(bi);
+		return;
+	}
+
+	bi_iter = bi->bi_iter;
+	bi->bi_iter.bi_sector = first_stripe * stripe_sectors;
+	bi->bi_iter.bi_size = ((last_stripe - first_stripe) *
+			       stripe_sectors) << 9;
+	md_account_bio(mddev, &bi);
+	orig_bi->bi_iter = bi_iter;
+	bi->bi_iter = bi_iter;
+	bi->bi_next = NULL;
+
+	logical_sector = first_stripe * conf->chunk_sectors;
+	last_sector = last_stripe * conf->chunk_sectors;
 
 	for (; logical_sector < last_sector;
 	     logical_sector += RAID5_STRIPE_SECTORS(conf)) {