[U-Boot] [PATCH 05/14] dfu: allow read with 0 data for EOF indication

[Lukasz Majewski <lukma@denx.de>]

Hi Patrick,

> This patch allows into the DFU backend to indicate that there is no
> remaining data (for EOF for example). That allows users to read a
> buffer greater than the device size; the dfu stack stops the read
> request when the backend return a length=0 without error.
> 
> Signed-off-by: Patrick Delaunay <patrick.delaunay@st.com>
> ---
> 
>  drivers/dfu/dfu.c | 2 ++
>  1 file changed, 2 insertions(+)
> 
> diff --git a/drivers/dfu/dfu.c b/drivers/dfu/dfu.c
> index 8bd5216017..50919fcae9 100644
> --- a/drivers/dfu/dfu.c
> +++ b/drivers/dfu/dfu.c
> @@ -396,6 +396,8 @@ static int dfu_read_buffer_fill(struct dfu_entity
> *dfu, void *buf, int size) debug("%s: Read error!\n", __func__);
>  				return ret;
>  			}
> +			if (dfu->b_left == 0)
> +				break;

I guess that this is the use case for sending commands?

Could you provide a more descriptive use case for this change (the
description in the above commit message is not enough for me to get it).

>  			dfu->offset += dfu->b_left;
>  			dfu->r_left -= dfu->b_left;
>  



Best regards,

Lukasz Majewski

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