[v2,1/1] ARM: orion5x: use mac_pton() helper

[Andrew Lunn]

> > Hi Andy
> > 
> > Thanks for pointing this patch out.
> > 
> > What is the advantage of doing to the strnlen()? As Stefan says, the
> > code which follows will detect a short string, in that a NULL is not
> > in [0-9a-f], nor a : .
> 
> I'm not sure, but my understanding is that, the strchr() call in the
> original code or isxdigit() in the follow up change will trash a cache a
> bit. Besides that some of the users are (often?) supplying empty strings
> to convert from, and in this case makes sense to bail out fast.

Is this function being called on a hot path? In the case which is
crashing, it is during early boot, and it gets called ~ 40 times, in
quick succession. The first call to isxdigit() will need to fetch part
of the _ctype array into cache, but since the caller is only walking
memory, i hope it is still in cache for the next call to mac_pton().

	Andrew