linux-mtd-bounces at lists.infradead.org wrote:
> mtdchar have not initilized all field of struct mtd_oob_ops
> in mtd_write when mode is MTD_MODE_RAW.
>
> function nand_do_write_ops
> if (ops->ooboffs && (ops->ooboffs + ops->ooblen > oobmaxlen))
> return -EINVAL;
>
> ooboffs is not initilized at mtd_write.
> So random data cause nand_do_write_ops return fail.
Looks like you have found the same thing:
http://lists.infradead.org/pipermail/linux-mtd/2010-September/032453.html
http://lists.infradead.org/pipermail/linux-mtd/2010-October/032538.html
> Signed-off-by: Frank Li <Frank.Li at freescale.com>
> ---
> drivers/mtd/mtdchar.c | 1 +
> 1 files changed, 1 insertions(+), 0 deletions(-)
>
> diff --git a/drivers/mtd/mtdchar.c b/drivers/mtd/mtdchar.c
> index b7ed09c..58839fa 100644
> --- a/drivers/mtd/mtdchar.c
> +++ b/drivers/mtd/mtdchar.c
> @@ -319,6 +319,7 @@ static ssize_t mtd_write(struct file
> *file, const char __user *buf, size_t count
> case MTD_MODE_RAW:
> {
> struct mtd_oob_ops ops;
> + memset(&ops, 0, sizeof(struct mtd_oob_ops));
>
> ops.mode = MTD_OOB_RAW;
> ops.datbuf = kbuf;
--
Jon Povey
jon.povey at racelogic.co.uk
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