[U-Boot] [RFC PATCH] usb: dfu: make nand upload working

[Lukasz Majewski <l.majewski@majess.pl>]

On Sat, 12 Oct 2013 15:47:14 +0800
Bo Shen <voice.shen@atmel.com> wrote:

> If won't pass value to dfu->r_left, it always 0, make no transfer,
> the dfu-util on host side report failed. So, before starting transfer,
> pass the value, then nand uploading can work.
> 
> Signed-off-by: Bo Shen <voice.shen@atmel.com>
> 
> ---
>  drivers/dfu/dfu.c |    1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/drivers/dfu/dfu.c b/drivers/dfu/dfu.c
> index 56b21c7..3c3ad1b 100644
> --- a/drivers/dfu/dfu.c
> +++ b/drivers/dfu/dfu.c
> @@ -274,6 +274,7 @@ int dfu_read(struct dfu_entity *dfu, void *buf,
> int size, int blk_seq_num) if (dfu->i_buf_start == NULL)
>  			return -ENOMEM;
>  
> +		dfu->r_left = dfu->data.nand.size;

Please do not add nand related code to "generic" DFU code. This can
damage DFU operation with other memories (like eMMC).

Such code shall be added to dfu_nand.c file.

>  		ret = dfu->read_medium(dfu, 0, dfu->i_buf_start,
> &dfu->r_left); if (ret != 0) {
>  			debug("%s: failed to get r_left\n",
> __func__);

Best regards,

Lukasz Majewski
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