The driver needs to check if the format is 802.2 vs 802.3 in order to
set a tx descriptor flag. skb->protocol can't be used, since it may not
be properly initialized for packets coming in from a packet socket. Fix
misdetection by checking the ethertype from the skb data instead.
Signed-off-by: Thibaut VARÈNE <hacks@slashdirt.org>
Signed-off-by: Petr Štetiar <ynezz@true.cz> [commit description]
4cb9d08e71