linux-kernel - [PATCH 5.5 156/257] mtd: rawnand: cadence: change bad block marker size

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Date:   Thu, 16 Apr 2020 15:23:27 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Piotr Sroka <piotrs@...ence.com>,
        Miquel Raynal <miquel.raynal@...tlin.com>
Subject: [PATCH 5.5 156/257] mtd: rawnand: cadence: change bad block marker size

From: Piotr Sroka <piotrs@...ence.com>

commit 9bf1903bed7a2e84f5a8deedb38f7e0ac5e8bfc6 upstream.

Increase bad block marker size from one byte to two bytes.
Bad block marker is handled by skip bytes feature of HPNFC.
Controller expects this value to be an even number.

Fixes: ec4ba01e894d ("mtd: rawnand: Add new Cadence NAND driver to MTD subsystem")
Cc: stable@...r.kernel.org
Signed-off-by: Piotr Sroka <piotrs@...ence.com>
Signed-off-by: Miquel Raynal <miquel.raynal@...tlin.com>
Link: https://lore.kernel.org/linux-mtd/1581328530-29966-3-git-send-email-piotrs@cadence.com
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 drivers/mtd/nand/raw/cadence-nand-controller.c |    9 +++------
 1 file changed, 3 insertions(+), 6 deletions(-)

--- a/drivers/mtd/nand/raw/cadence-nand-controller.c
+++ b/drivers/mtd/nand/raw/cadence-nand-controller.c
@@ -2603,12 +2603,9 @@ int cadence_nand_attach_chip(struct nand
 	chip->options |= NAND_NO_SUBPAGE_WRITE;
 
 	cdns_chip->bbm_offs = chip->badblockpos;
-	if (chip->options & NAND_BUSWIDTH_16) {
-		cdns_chip->bbm_offs &= ~0x01;
-		cdns_chip->bbm_len = 2;
-	} else {
-		cdns_chip->bbm_len = 1;
-	}
+	cdns_chip->bbm_offs &= ~0x01;
+	/* this value should be even number */
+	cdns_chip->bbm_len = 2;
 
 	ret = nand_ecc_choose_conf(chip,
 				   &cdns_ctrl->ecc_caps,