[PATCH] libfdt: Remove superfluous NUL character from overlay symbols

[Simon Glass]

Hi Marcus,

On Fri, 22 May 2020 at 10:42, Marcus Comstedt <marcus at mc.pp.se> wrote:
>
> The symbol path already ends with a NUL character (something which is
> actually checked by the code) and this NUL is included in
> rel_path_len, so there is no need to add a second one.
>
> This change fixes incorrect display in "fdt list /__symbols" after
> applying an overlay with symbols.
>
> Signed-off-by: Marcus Comstedt <marcus at mc.pp.se>
> ---
>  scripts/dtc/libfdt/fdt_overlay.c | 5 ++---
>  1 file changed, 2 insertions(+), 3 deletions(-)

Could you please send this patch upstream?

>
> diff --git a/scripts/dtc/libfdt/fdt_overlay.c b/scripts/dtc/libfdt/fdt_overlay.c
> index c090e6991e..bd75e3dd78 100644
> --- a/scripts/dtc/libfdt/fdt_overlay.c
> +++ b/scripts/dtc/libfdt/fdt_overlay.c
> @@ -757,7 +757,7 @@ static int overlay_symbol_update(void *fdt, void *fdto)
>                            && (memcmp(s, "/__overlay__", len - 1) == 0)) {
>                         /* /<fragment-name>/__overlay__ */
>                         rel_path = "";
> -                       rel_path_len = 0;
> +                       rel_path_len = 1; /* Include NUL character */
>                 } else {
>                         /* Symbol refers to something that won't end
>                          * up in the target tree */
> @@ -794,7 +794,7 @@ static int overlay_symbol_update(void *fdt, void *fdto)
>                 }
>
>                 ret = fdt_setprop_placeholder(fdt, root_sym, name,
> -                               len + (len > 1) + rel_path_len + 1, &p);
> +                               len + (len > 1) + rel_path_len, &p);
>                 if (ret < 0)
>                         return ret;
>
> @@ -820,7 +820,6 @@ static int overlay_symbol_update(void *fdt, void *fdto)
>
>                 buf[len] = '/';
>                 memcpy(buf + len + 1, rel_path, rel_path_len);
> -               buf[len + 1 + rel_path_len] = '\0';
>         }
>
>         return 0;
> --
> 2.26.2
>

Regards,
Simon