diff --git a/drivers/md/dm-raid.c b/drivers/md/dm-raid.c
index dc8568a..56b723d 100644
--- a/drivers/md/dm-raid.c
+++ b/drivers/md/dm-raid.c
@@ -3730,14 +3730,12 @@ static void raid_io_hints(struct dm_target *ti, struct queue_limits *limits)
 	blk_limits_io_opt(limits, chunk_size_bytes * mddev_data_stripes(rs));
 
 	/*
-	 * RAID10 personality requires bio splitting,
-	 * RAID0/1/4/5/6 don't and process large discard bios properly.
+	 * RAID1 and RAID10 personalities require bio splitting,
+	 * RAID0/4/5/6 don't and process large discard bios properly.
 	 */
-	if (rs_is_raid10(rs)) {
-		limits->discard_granularity = max(chunk_size_bytes,
-						  limits->discard_granularity);
-		limits->max_discard_sectors = min_not_zero(rs->md.chunk_sectors,
-							   limits->max_discard_sectors);
+	if (rs_is_raid1(rs) || rs_is_raid10(rs)) {
+		limits->discard_granularity = chunk_size_bytes;
+		limits->max_discard_sectors = rs->md.chunk_sectors;
 	}
 }
 
diff --git a/drivers/md/md.h b/drivers/md/md.h
index bb645bc..2175a5a 100644
--- a/drivers/md/md.h
+++ b/drivers/md/md.h
@@ -311,7 +311,7 @@ struct mddev {
 	int				external;	/* metadata is
 							 * managed externally */
 	char				metadata_type[17]; /* externally set*/
-	unsigned int			chunk_sectors;
+	int				chunk_sectors;
 	time64_t			ctime, utime;
 	int				level, layout;
 	char				clevel[16];
@@ -339,7 +339,7 @@ struct mddev {
 	 */
 	sector_t			reshape_position;
 	int				delta_disks, new_level, new_layout;
-	unsigned int			new_chunk_sectors;
+	int				new_chunk_sectors;
 	int				reshape_backwards;
 
 	struct md_thread		*thread;	/* management thread */