From: Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>
Date: Wed, 22 May 2013 22:04:01 +0200

+			memcpy((void *)p->value, reg, 6);

This cast is completely unnecessary, non-void to void pointer casts
are automatic.

If it is necessary, because p->value is const, then you are trying
to change something behind the OF layer's back and need to use
the appropriate interface to change the property contents.