[PATCH 1/4] OF: Add helper for matching against linux, stdout-path

[Lothar Waßmann]

Hi,

Sascha Hauer writes:
> On Wed, Nov 21, 2012 at 04:57:05PM +0100, Jean-Christophe PLAGNIOL-VILLARD wrote:
> > From: Sascha Hauer <s.hauer at pengutronix.de>
> > 
> > devicetrees may have a linux,stdout-path or stdout-path property
> > in the chosen node describing the console device. This adds a helper
> > function to match a device against this property and retrieve the options
> > so a driver can call add_preferred_console for a matching device.
> > 
[...]
> > +	if (!tmp)
> > +		return 0;
> > +
> > +	dn_stdout = of_find_node_by_path(tmp);
> > +
> > +	if (dn_stdout && dn_stdout == dn) {
> > +		is_stdout = 1;
> > +		tmp_option++;
> > +		*option = kstrdup(tmp_option, GFP_KERNEL);
> > +	}
> > +
> > +	of_node_put(dn_stdout);
> 
> dn_stdout may be NULL aswell.
> 
which is handled gracefully by of_node_put()...


Lothar Waßmann
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