Re: [PATCH v4 01/14] of: Correct child specifier used as input of the 2nd nexus node

[Rob Herring (Arm)]

On Thu, 09 Jan 2025 21:26:52 +0800, Zijun Hu wrote:
> From: Zijun Hu <quic_zijuhu@xxxxxxxxxxx>
> 
> API of_parse_phandle_with_args_map() will use wrong input for nexus node
> Nexus_2 as shown below:
> 
>     Node_1		Nexus_1                              Nexus_2
> &Nexus_1,arg_1 -> arg_1,&Nexus_2,arg_2' -> &Nexus_2,arg_2 -> arg_2,...
> 		  map-pass-thru=<...>
> 
> Nexus_1's output arg_2 should be used as input of Nexus_2, but the API
> wrongly uses arg_2' instead which != arg_2 due to Nexus_1's map-pass-thru.
> 
> Fix by always making @match_array point to @initial_match_array into
> which to store nexus output.
> 
> Fixes: bd6f2fd5a1d5 ("of: Support parsing phandle argument lists through a nexus node")
> Cc: stable@xxxxxxxxxxxxxxx
> Signed-off-by: Zijun Hu <quic_zijuhu@xxxxxxxxxxx>
> ---
>  drivers/of/base.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 

Applied, thanks!