There have been some improvements in more recent versions of the mtd
that might make things work better.

You can configure YAFFS to use the mtd's ECC or not
(CONFIG_YAFFS_USE_NANDECC).

If you don't use the mtd's ECC, then mtd will give you the warnings you
mention.

-- Charles


-----Original Message-----
From: yaffs-admin@stoneboat.aleph1.co.uk
[mailto:yaffs-admin@stoneboat.aleph1.co.uk] On Behalf Of zheng wei
Sent: Monday, 8 November 2004 2:11 a.m.
To: yaffs@stoneboat.aleph1.co.uk
Subject: [Yaffs] Can't enable ecc check for yaffs


Hi, sir
 I cannot enable ecc check in mtd, the message in nand.c, func int
nand_write_page (), printk (KERN_WARNING "Writing data without ECC to
NAND-FLASH is not recommended\n");

In mtd/nand.c,
static int nand_write_page (struct mtd_info *mtd, struct nand_chip
*this, int page, u_char *oob_buf,  struct nand_oobinfo *oobsel) {
	int 	i, status;
	u_char	ecc_code[6], *oob_data;
	int	eccmode = oobsel->useecc ? this->eccmode :
NAND_ECC_NONE;
//??????? I have initialize the eccmode to NAND_ECC_HW3_512, ... }

I have enable the ecc check in mizi linux 2.4.18 for ARM2410.

Thank you

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