linux-kernel - Re: [PATCH v5 1/4] device property: Allow error pointer to be passed to fwnode APIs

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Date:   Wed, 06 Apr 2022 20:05:23 +0200
From:   Michael Walle <michael@...le.cc>
To:     Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
Cc:     linux-acpi@...r.kernel.org, linux-kernel@...r.kernel.org,
        Daniel Scally <djrscally@...il.com>,
        Heikki Krogerus <heikki.krogerus@...ux.intel.com>,
        Sakari Ailus <sakari.ailus@...ux.intel.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        "Rafael J. Wysocki" <rafael@...nel.org>,
        Len Brown <lenb@...nel.org>,
        Nuno Sá <nuno.sa@...log.com>
Subject: Re: [PATCH v5 1/4] device property: Allow error pointer to be passed
 to fwnode APIs

> @@ -480,15 +485,19 @@ int fwnode_property_get_reference_args(const
> struct fwnode_handle *fwnode,
>  {
>  	int ret;
> 
> +	if (IS_ERR_OR_NULL(fwnode))
> +		return -ENOENT;
> +
>  	ret = fwnode_call_int_op(fwnode, get_reference_args, prop, 
> nargs_prop,
>  				 nargs, index, args);
> +	if (ret == 0)
> +		return ret;
> 
> -	if (ret < 0 && !IS_ERR_OR_NULL(fwnode) &&
> -	    !IS_ERR_OR_NULL(fwnode->secondary))
> -		ret = fwnode_call_int_op(fwnode->secondary, get_reference_args,
> -					 prop, nargs_prop, nargs, index, args);
> +	if (IS_ERR_OR_NULL(fwnode->secondary))
> +		return -ENOENT;

Doesn't this mean you overwrite any return code != 0 with -ENOENT?
Is this intended?

In any case:
Tested-by: Michael Walle <michael@...le.cc>

-michael