mtd: nand: Fix integer overflow in ONFI detection of chips >= 4GiB

Signed-off-by: NDavid Woodhouse <David.Woodhouse@intel.com>

drivers/mtd/nand/nand_base.c

@@ -2894,7 +2894,7 @@ static int nand_flash_detect_onfi(struct mtd_info *mtd, struct nand_chip *chip,
 	mtd->writesize = le32_to_cpu(p->byte_per_page);
 	mtd->erasesize = le32_to_cpu(p->pages_per_block) * mtd->writesize;
 	mtd->oobsize = le16_to_cpu(p->spare_bytes_per_page);
-	chip->chipsize = le32_to_cpu(p->blocks_per_lun) * mtd->erasesize;
+	chip->chipsize = (uint64_t)le32_to_cpu(p->blocks_per_lun) * mtd->erasesize;
 	busw = 0;
 	if (le16_to_cpu(p->features) & 1)
 		busw = NAND_BUSWIDTH_16;