[U-Boot] [PATCH 5/5] fit: Introduce methods for applying overlays on fit-load

[stefan.bruens at rwth-aachen.de <stefan.bruens@rwth-aachen.de>]

On Dienstag, 4. Juli 2017 19:05:25 CEST Pantelis Antoniou wrote:
> Hi Marek,
> 
> On Sat, 2017-07-01 at 16:11 +0200, Marek Vasut wrote:
> > On 06/30/2017 06:23 PM, Pantelis Antoniou wrote:
> > > Introduce an overlay based method for constructing a base DT blob
> > > to pass to the kernel.
> > > 
> > > Both canned and runtime feature selection is supported.
> > > 
> > > Signed-off-by: Pantelis Antoniou <pantelis.antoniou@konsulko.com>
> > 
> > [...]
> > 
> > > @@ -1475,29 +1482,58 @@ int fit_conf_get_node(const void *fit, const
> > > char *conf_uname)> > 
> > >  		debug("Found default configuration: '%s'\n", conf_uname);
> > >  	
> > >  	}
> > > 
> > > +	s = strchr(conf_uname, '#');
> > > +	if (s) {
> > > +		len = s - conf_uname;
> > > +		conf_uname_copy = malloc(len + 1);
> > > +		if (!conf_uname_copy) {
> > > +			debug("Can't allocate uname copy: '%s'\n",
> > > +					conf_uname);
> > > +			return -ENOMEM;
> > > +		}
> > > +		memcpy(conf_uname_copy, conf_uname, len);
> > 
> > Is that like strdup() here ?
> 
> No. The space allocated is not the full string, just the span until the
> next #.

You could use strndup() to copy only the first n characters.
 
> > > +		conf_uname_copy[len] = '\0';
> > > +		conf_uname = conf_uname_copy;
> > > +	}
> > > +
> > > 
> > >  	noffset = fdt_subnode_offset(fit, confs_noffset, conf_uname);
> > >  	if (noffset < 0) {
> > >  	
> > >  		debug("Can't get node offset for configuration unit name: '%s'
> > >  		(%s)\n",
> > >  		
> > >  		      conf_uname, fdt_strerror(noffset));
> > >  	
> > >  	}
> > > 
> > > +	if (conf_uname_copy)

No need for a null ptr check, IIRC.

> > > +		free(conf_uname_copy);
> > > +
> > > 
> > >  	return noffset;
> > >  
> > >  }
> > 
> > [...]
> 
> Regards
> 
> -- Pantelis
> 
> 
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