[Yaffs] How can i read out ecc layout data when ECCGETLAYOUT failed

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Author: yy xuye
Date:
To: yaffs
Subject: [Yaffs] How can i read out ecc layout data when ECCGETLAYOUT failed

Hi guys,

I want to dump yaffs2's nand data with ioctl function. But the control
param is fail for some devices, the code as so:

    struct nand_ecclayout ecc_layout;
    ret = ioctl(ctx->fd, ECCGETLAYOUT, &ecc_layout);

It return error message as so: Inappropriate ioctl for device.

Why?

Is there any other methods that i can get the ECC Layout data?

BR.
--
yy.xue

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