Re: [PATCH 00/12] Marvell NAND controller rework with ->exec_op()

[Miquel RAYNAL <miquel.raynal@free-electrons.com>]

Hello Robert,

On Tue, 09 Jan 2018 08:57:59 +0100
Robert Jarzmik <robert.jarzmik@free.fr> wrote:

> Boris Brezillon <boris.brezillon@free-electrons.com> writes:
> 
> Ok I recovered my NAND.
> 
> For the next try, I'd like you to provide another "temporary patch"
> to disable BBT actual writing, just to be sure. Once the driver is
> working properly, I'll make another try without the temporary patch.

The best way to do it is to avoid using the BBT at all, and while I was
looking for the right line to comment in the Zylonite's board file I
found out that the boolean flash_bbt is not actually set and then I
remembered an old mail from you, then you should:

----->8-----
diff --git a/arch/arm/mach-pxa/zylonite.c b/arch/arm/mach-pxa/zylonite.c
index 0534949d63f6..d247ef01dc62 100644
--- a/arch/arm/mach-pxa/zylonite.c
+++ b/arch/arm/mach-pxa/zylonite.c
@@ -378,6 +378,8 @@ static struct mtd_partition
zylonite_nand_partitions[] = { static struct pxa3xx_nand_platform_data
zylonite_nand_info = { .parts		= zylonite_nand_partitions,
 	.nr_parts	= ARRAY_SIZE(zylonite_nand_partitions),
-	.flash_bbt	= 1,
	.keep_config	= 1,
 };
 
 static void __init zylonite_init_nand(void)
-----8<-----

Then, do not forget to resize the partition that stores the BBT to
remove the last 4 erase blocks from it to avoid UBI/UBIFS smashing it.

Then you should be fine.

You can test this branch (updated with last version I sent earlier):
https://github.com/miquelraynal/linux/tree/marvell/nand-next/nfc


Thanks,
Miquèl