[U-Boot] [PATCH] net: Always build the string_to_enetaddr() helper

[Joe Hershberger]

On Sat, Sep 14, 2019 at 1:32 PM Tom Rini <trini at konsulko.com> wrote:
>
> On Sat, Sep 14, 2019 at 04:05:44PM +0200, Ondřej Jirman wrote:
> > Hi,
> >
> > On Fri, Sep 13, 2019 at 07:40:22PM -0500, Joe Hershberger wrote:
> > > Part of the env cleanup moved this out of the environment code and into
> > > the net code. However, this helper is sometimes needed even when the net
> > > stack isn't included.
> > >
> > > Move the helper to lib/net_utils.c like it's similarly-purposed
> > > string_to_ip(). Also rename the moved function to similar naming.
> > >
> > > Signed-off-by: Joe Hershberger <joe.hershberger at ni.com>
> > > Reported-by: Ondrej Jirman <megous at megous.com>
> >
> > I've tested the patch and it works, but I'be found other related issue, where
> > u-boot thinks %pM will format a MAC address string, but it does just
> > print out the pointer due to relevant functions being gated by CONFIG_CMD_NET
> > guard in lib/vsprintf.c.
> >
> > The gating should probably be done so that it panics/halts the u-boot if gated
> > pointer flags are used by u-boot code, because that will clearly be incorrect,
> > without calling code ever knowing. This way the user will know that something
> > is wrong and will have to fix the code.
>
> I'm not in favor of panic because of calling an unimplemented print
> format character.  I guess we'll need to see what the size increase is
> on un-guarding these formats and go from there.

I'll look into it. I'm also not in favor of a panic.

-Joe