[U-Boot] [PATCH 1/2] usb: kbd: don't fail with iomux

[Bin Meng]

Hi Rob,

On Sat, Jul 22, 2017 at 3:13 AM, Rob Clark <robdclark at gmail.com> wrote:
> stdin might not be set, which would cause iomux_doenv() to fail
> therefore causing probe_usb_keyboard() to fail.  Furthermore if we do
> have iomux enabled, the sensible thing (in terms of user experience)
> would be to simply add ourselves to the list of stdin devices.
>
> Signed-off-by: Rob Clark <robdclark at gmail.com>
> ---
>  common/usb_kbd.c | 14 ++++++++++++++
>  1 file changed, 14 insertions(+)
>
> diff --git a/common/usb_kbd.c b/common/usb_kbd.c
> index d2d29cc98f..72cf78abd4 100644
> --- a/common/usb_kbd.c
> +++ b/common/usb_kbd.c
> @@ -517,7 +517,21 @@ static int probe_usb_keyboard(struct usb_device *dev)
>
>         stdinname = getenv("stdin");
>  #if CONFIG_IS_ENABLED(CONSOLE_MUX)
> +       char *devname = DEVNAME;
> +       /* stdin might not be set yet.. either way, with console-mux the

nits: /* should be on a single line

> +        * sensible thing to do is add ourselves to the list of stdio
> +        * devices:
> +        */
> +       if (stdinname) {
> +               char *newstdin = malloc(strlen(stdinname) + strlen(","DEVNAME) + 1);
> +               sprintf(newstdin, "%s,"DEVNAME, stdinname);

We should check whether are are already in the stdin, if not, then add
by ourselves.

> +               stdinname = newstdin;
> +       } else {
> +               stdinname = devname;
> +       }
>         error = iomux_doenv(stdin, stdinname);
> +       if (stdinname != devname)
> +               free(stdinname);
>         if (error)
>                 return error;
>  #else
> --

Regards,
Bin