On Thursday 26 Jun 2014 à 13:35:50 (-0700), David Miller wrote:

quoted

for some reasons, hostapd kept adding and removing the interface from
the bridge, triggering a mac address of the bridge change each time (I
did not notice that).

I think this is what you need to investigate rather than making
changes to the bridge layer.

Of course I fixed the problem with hostapd, I was just explaining how
I noticed that behaviour in the bridge code.

If that behaviour is intended then just forget that patch.

-- 
Maxime