[U-Boot] [PATCH 1/1] usb: gadget: g_dnl: Use serial# variable to set g_dnl_serial

[Sam Protsenko]

On 31 August 2017 at 21:20, Sam Protsenko <semen.protsenko at linaro.org> wrote:
> Since 842778a09104 commit, "fastboot devices" stopped to show correct
> device serial number for TI boards, showing this line instead:
>
>     ????????????        fastboot
>
> This is because serial# env variable could be set after g_dnl gadget was
> initialized (e.g. by using env_set() in the board file).
>
> To fix this, before checking g_dnl_serial, let's re-check if we have
> valid serial# value. And if so, let's set it as g_dnl_serial value.
>
> Signed-off-by: Sam Protsenko <semen.protsenko at linaro.org>
> ---
>  drivers/usb/gadget/g_dnl.c | 9 +++++++++
>  1 file changed, 9 insertions(+)
>
> diff --git a/drivers/usb/gadget/g_dnl.c b/drivers/usb/gadget/g_dnl.c
> index 0491a0eea9..e4d0289757 100644
> --- a/drivers/usb/gadget/g_dnl.c
> +++ b/drivers/usb/gadget/g_dnl.c
> @@ -226,6 +226,15 @@ static int g_dnl_bind(struct usb_composite_dev *cdev)
>
>         g_dnl_bind_fixup(&device_desc, cdev->driver->name);
>
> +       /* First try to obtain serial number from serial# variable */
> +       if (strlen(g_dnl_serial) == 0) {
> +               const char *s;
> +
> +               s = env_get("serial#");
> +               if (s)
> +                       g_dnl_set_serialnumber((char *)s);
> +       }
> +
>         if (strlen(g_dnl_serial)) {
>                 id = usb_string_id(cdev);
>                 if (id < 0)
> --
> 2.14.1
>

Similar commit: [1]. But I'm not sure that implementing
g_dnl_bind_fixup() in board file is the best way to fix it.

[1] http://git.denx.de/?p=u-boot.git;a=commit;h=e91ead868b536d0a0dc49aa48f4d8c80c1a94b79