[PATCH 1/7] lib/fdtdec.c: Disallow overriding the fdt address with mandatory passage

[Tom Rini]

On Wed, Jul 08, 2026 at 12:26:04PM -0400, Raymond Mao wrote:
> Hi Tom,
> 
> On Tue, Jul 7, 2026 at 9:30 PM Tom Rini <trini at konsulko.com> wrote:
> >
> > When we have CONFIG_BLOBLIST_PASSAGE_MANDATORY don't allow the device
> > tree address to be overridden. The device tree we're given is the one
> > that must be used.
> >
> 
> The commit message does not explicitly mention this is only for
> OF_BOARD. So I think we need to add
> "!IS_ENABLED(CONFIG_BLOBLIST_PASSAGE_MANDATORY)" to the next check as
> well:
> 
>          /* Allow the early environment to override the fdt address */
>  -       if (!IS_ENABLED(CONFIG_XPL_BUILD)) {
>  +       if (!IS_ENABLED(CONFIG_XPL_BUILD) &&
>  +           !IS_ENABLED(CONFIG_BLOBLIST_PASSAGE_MANDATORY)) {
>                  ulong addr;
> 
> Or, state in the commit message that it is for OF_BOARD only.
> 
> Regards,
> Raymond
> 
> 
> > Signed-off-by: Tom Rini <trini at konsulko.com>
> > ---
> > Cc: Ilias Apalodimas <ilias.apalodimas at linaro.org>
> > Cc: Raymond Mao <raymondmaoca at gmail.com>
> > ---
> >  lib/fdtdec.c | 3 ++-
> >  1 file changed, 2 insertions(+), 1 deletion(-)
> >
> > diff --git a/lib/fdtdec.c b/lib/fdtdec.c
> > index b91e067106dd..ecb22a58b964 100644
> > --- a/lib/fdtdec.c
> > +++ b/lib/fdtdec.c
> > @@ -1856,7 +1856,8 @@ int fdtdec_setup(void)
> >         }
> >
> >         /* Allow the board to override the fdt address. */
> > -       if (IS_ENABLED(CONFIG_OF_BOARD)) {
> > +       if (IS_ENABLED(CONFIG_OF_BOARD) &&
> > +           !IS_ENABLED(CONFIG_BLOBLIST_PASSAGE_MANDATORY)) {
> >                 void *blob;
> >
> >                 blob = (void *)gd->fdt_blob;

I might have to jump back to what the code looked like in January or so,
to figure this out again. We never set OF_BOARD and
BLOBLIST_PASSAGE_MANDATORY so this change here never matters. It might
have been because I was doing this on top of the (now merged) rework of
bloblist_init and bloblist_maybe_init. I'll look harder at this and post
a v2, thanks!

-- 
Tom
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