diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h
index 89d89c7..6189bf2 100644
--- a/include/linux/blkdev.h
+++ b/include/linux/blkdev.h
@@ -844,7 +844,7 @@
 						     unsigned int cmd_flags)
 {
 	if (unlikely(cmd_flags & REQ_DISCARD))
-		return q->limits.max_discard_sectors;
+		return min(q->limits.max_discard_sectors, UINT_MAX >> 9);
 
 	if (unlikely(cmd_flags & REQ_WRITE_SAME))
 		return q->limits.max_write_same_sectors;