diff --git a/drivers/md/bcache/sysfs.c b/drivers/md/bcache/sysfs.c
index 59bf13faf75228b9371b16e8aeee3246de2759e2..01c7c4452a269e379ef1fa02e360b37ecf0412ac 100644
--- a/drivers/md/bcache/sysfs.c
+++ b/drivers/md/bcache/sysfs.c
@@ -295,7 +295,9 @@ STORE(__cached_dev)
 		dc->io_disable = v ? 1 : 0;
 	}
 
-	d_strtoi_h(sequential_cutoff);
+	sysfs_strtoul_clamp(sequential_cutoff,
+			    dc->sequential_cutoff,
+			    0, UINT_MAX);
 	d_strtoi_h(readahead);
 
 	if (attr == &sysfs_clear_stats)