[PATCH v2 3/4] cmd: kaslrseed: Use common API to fixup FDT

[Simon Glass]

Hi Sean,

On Tue, 29 Aug 2023 at 14:37, <seanedmond at linux.microsoft.com> wrote:
>
> From: Sean Edmond <seanedmond at microsoft.com>
>
> Use the newly introduced common API fdt_fixup_kaslr_seed() in the
> kaslrseed command.
>
> Signed-off-by: Sean Edmond <seanedmond at microsoft.com>
> ---
>  cmd/kaslrseed.c | 22 ++++++++--------------
>  1 file changed, 8 insertions(+), 14 deletions(-)
>
> diff --git a/cmd/kaslrseed.c b/cmd/kaslrseed.c
> index 8a1d8120cd..c65607619b 100644
> --- a/cmd/kaslrseed.c
> +++ b/cmd/kaslrseed.c
> @@ -19,7 +19,7 @@ static int do_kaslr_seed(struct cmd_tbl *cmdtp, int flag, int argc, char *const
>         size_t n = 0x8;
>         struct udevice *dev;
>         u64 *buf;
> -       int nodeoffset;
> +       ofnode root;
>         int ret = CMD_RET_SUCCESS;
>
>         if (uclass_get_device(UCLASS_RNG, 0, &dev) || !dev) {
> @@ -45,21 +45,15 @@ static int do_kaslr_seed(struct cmd_tbl *cmdtp, int flag, int argc, char *const
>                 return CMD_RET_FAILURE;
>         }
>
> -       ret = fdt_check_header(working_fdt);
> -       if (ret < 0) {
> -               printf("fdt_chosen: %s\n", fdt_strerror(ret));
> -               return CMD_RET_FAILURE;
> -       }
> -
> -       nodeoffset = fdt_find_or_add_subnode(working_fdt, 0, "chosen");
> -       if (nodeoffset < 0) {
> -               printf("Reading chosen node failed\n");
> -               return CMD_RET_FAILURE;
> +       ret = root_ofnode_from_fdt(working_fdt, &root);
> +       if (ret) {
> +               printf("ERROR: Unable to get root ofnode\n");
> +               goto CMD_RET_FAILURE;
>         }
>
> -       ret = fdt_setprop(working_fdt, nodeoffset, "kaslr-seed", buf, sizeof(buf));
> -       if (ret < 0) {
> -               printf("Unable to set kaslr-seed on chosen node: %s\n", fdt_strerror(ret));
> +       ret = fdt_fixup_kaslr_seed(root, buf, sizeof(buf));
> +       if (ret) {
> +               printf("ERROR: failed to add kaslr-seed to fdt\n");
>                 return CMD_RET_FAILURE;
>         }

Reviewed-by: Simon Glass <sjg at chromium.org>

So this command is intended to be used in a script? I am just trying
to understand why we have the fixup code as well as this.

Regards,
Simon