[PATCH master] of: overlay: don't do fixups on empty global.of.overlay.dir

[Sascha Hauer]

On Tue, Aug 31, 2021 at 06:11:39PM +0200, Ahmad Fatoum wrote:
> $global.of.overlay.dir is dynamically prepended with the root of the
> device currently being booted. This allows use of relative paths.
> 
> Because $global.of.overlay.filepattern is * by default, this means that
> all files in the root of the device will be considered overlays and
> barebox will try to unflatten them leading to an error message on boot:
> 
>   ERROR: of_overlay: Failed to unflatten /mnt/mmc0.4//.root_is_rw:
> 	Invalid argument
> 
> Fix this by not doing any fixups at all on empty global.of.overlay.dir.
> 
> If for whatever reason, a user wants overlays at /, they can
> 
>   global.of.overlay.dir=.
> 
> Fixes: 124c64af0982 ("overlay: Add filters to choose which overlays to apply")
> Signed-off-by: Ahmad Fatoum <a.fatoum at pengutronix.de>
> ---
>  drivers/of/overlay.c | 3 +++
>  1 file changed, 3 insertions(+)

Applied, thanks

Sascha


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