diff --git a/drivers/mtd/onenand/onenand_base.c b/drivers/mtd/onenand/onenand_base.c
index ff66e43..cbe2711 100644
--- a/drivers/mtd/onenand/onenand_base.c
+++ b/drivers/mtd/onenand/onenand_base.c
@@ -2725,7 +2725,7 @@ static int onenand_otp_walk(struct mtd_info *mtd, loff_t from, size_t len,
 	}
 
 	/* Check User/Factory boundary */
-	if (((mtd->writesize * otp_pages) - (from + len)) < 0)
+	if (mtd->writesize * otp_pages < from + len)
 		return 0;
 
 	onenand_get_device(mtd, FL_OTPING);