[3.13.y.z extended stable] Patch "mtd: atmel_nand: Disable subpage NAND write when using Atmel PMECC" has been added to staging queue

Kamal Mostafa kamal at canonical.com
Thu May 1 19:17:11 UTC 2014

This is a note to let you know that I have just added a patch titled

    mtd: atmel_nand: Disable subpage NAND write when using Atmel PMECC

to the linux-3.13.y-queue branch of the 3.13.y.z extended stable tree 
which can be found at:


This patch is scheduled to be released in version

If you, or anyone else, feels it should not be added to this tree, please 
reply to this email.

For more information about the 3.13.y.z tree, see



>From b3ad374618b7683ea75d05cc52db56473d040658 Mon Sep 17 00:00:00 2001
From: Herve Codina <Herve.CODINA at celad.com>
Date: Mon, 3 Mar 2014 12:15:29 +0100
Subject: mtd: atmel_nand: Disable subpage NAND write when using Atmel PMECC

commit 90445ff6241e2a13445310803e2efa606c61f276 upstream.

Crash detected on sam5d35 and its pmecc nand ecc controller.

The problem was a call to chip->ecc.hwctl from nand_write_subpage_hwecc
(nand_base.c) when we write a sub page.
chip->ecc.hwctl function is not set when we are using PMECC controller.
As a workaround, set NAND_NO_SUBPAGE_WRITE for PMECC controller in
order to disable sub page access in nand_write_page.

Signed-off-by: Herve Codina <Herve.CODINA at celad.com>
Acked-by: Josh Wu <josh.wu at atmel.com>
Signed-off-by: Brian Norris <computersforpeace at gmail.com>
Signed-off-by: Kamal Mostafa <kamal at canonical.com>
 drivers/mtd/nand/atmel_nand.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/mtd/nand/atmel_nand.c b/drivers/mtd/nand/atmel_nand.c
index 59f08c4..1974009 100644
--- a/drivers/mtd/nand/atmel_nand.c
+++ b/drivers/mtd/nand/atmel_nand.c
@@ -1220,6 +1220,7 @@ static int atmel_pmecc_nand_init_params(struct platform_device *pdev,
 		goto err;

+	nand_chip->options |= NAND_NO_SUBPAGE_WRITE;
 	nand_chip->ecc.read_page = atmel_nand_pmecc_read_page;
 	nand_chip->ecc.write_page = atmel_nand_pmecc_write_page;


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