[PATCH V2] kho: Convert error handling to immediate return pattern

[longwei (I)]

Hi Matthew,

Thanks for the review.

I chose the explicit `if (err) return err` pattern for clarity and
"fail fast" behavior. However, I'm happy to adopt the chained pattern
if the maintainer prefers it.

Thanks,
Long Wei

在 2026/8/24 10:54, Matthew Wilcox 写道:
> On Mon, Aug 24, 2026 at 10:44:48AM +0800, LongWei27 wrote:
>> +++ b/kernel/liveupdate/kexec_handover.c
>> @@ -1438,20 +1438,34 @@ static __init int kho_out_fdt_setup(void)
>>  	int err;
>>  
>>  	err = fdt_create(root, PAGE_SIZE);
>> -	err |= fdt_finish_reservemap(root);
>> -	err |= fdt_begin_node(root, "");
>> -	err |= fdt_property_string(root, "compatible", KHO_FDT_COMPATIBLE);
>> +	if (err)
>> +		return err;
>> +	err = fdt_finish_reservemap(root);
>> +	if (err)
>> +		return err;
>> +	err = fdt_begin_node(root, "");
>> +	if (err)
>> +		return err;
>> +	err = fdt_property_string(root, "compatible", KHO_FDT_COMPATIBLE);
>> +	if (err)
>> +		return err;
> 
> Less verbose:
> 
>  	err = fdt_create(root, PAGE_SIZE);
> -	err |= fdt_finish_reservemap(root);
> -	err |= fdt_begin_node(root, "");
> -	err |= fdt_property_string(root, "compatible", KHO_FDT_COMPATIBLE);
> +	if (!err)
> +		err = fdt_finish_reservemap(root);
> +	if (!err)
> +		err = fdt_begin_node(root, "");
> +	if (!err)
> +		err = fdt_property_string(root, "compatible",
> +				KHO_FDT_COMPATIBLE);
> 
> up to the maintainer which one they prefer ...