diff --git a/drivers/mtd/nand/nand_base.c b/drivers/mtd/nand/nand_base.c
index ec6841d..e292074 100644
--- a/drivers/mtd/nand/nand_base.c
+++ b/drivers/mtd/nand/nand_base.c
@@ -2989,7 +2989,8 @@ static void nand_decode_ext_id(struct mtd_info *mtd, struct nand_chip *chip,
 	 * Check for ID length, cell type, and Hynix/Samsung ID to decide what
 	 * to do.
 	 */
-	if (id_len == 6 && id_data[0] == NAND_MFR_SAMSUNG) {
+	if (id_len == 6 && id_data[0] == NAND_MFR_SAMSUNG &&
+			(chip->cellinfo & NAND_CI_CELLTYPE_4LVL)) {
 		/* Calc pagesize */
 		mtd->writesize = 2048 << (extid & 0x03);
 		extid >>= 2;
diff --git a/include/linux/mtd/nand.h b/include/linux/mtd/nand.h
index 24e9159..3e3860e 100644
--- a/include/linux/mtd/nand.h
+++ b/include/linux/mtd/nand.h
@@ -227,6 +227,10 @@ typedef enum {
 /* Cell info constants */
 #define NAND_CI_CHIPNR_MSK	0x03
 #define NAND_CI_CELLTYPE_MSK	0x0C
+#define NAND_CI_CELLTYPE_2LVL	0x00
+#define NAND_CI_CELLTYPE_4LVL	0x04
+#define NAND_CI_CELLTYPE_8LVL	0x08
+#define NAND_CI_CELLTYPE_16LVL	0x0C
 
 /* Keep gcc happy */
 struct nand_chip;