K 10
svn:author
V 2
kp
K 8
svn:date
V 27
2023-05-15T05:08:22.736069Z
K 7
svn:log
V 664
e1000: fix VLAN 0

VLAN 0 essentially means "Treat as untagged, but with priority bits",
and is used by some ISPs.

On igb/em interfaces we did not receive packets with VLAN tag 0 unless
vlanhwfilter was disabled.

This can be fixed by explicitly listing VLAN 0 in the hardware VLAN
filter (VFTA). Do this from em_setup_vlan_hw_support(), where we already
(re-)write the VFTA.

Reviewed by:	kbowling
Sponsored by:   Rubicon Communications, LLC ("Netgate")
Differential Revision:	https://reviews.freebsd.org/D40046

(cherry picked from commit 0229fab2fe0eed843ebec98fd31b7d49bb2e8438)

Git Hash:   5cb5b368829dd075bec55ada6c1374538ec7c6d0
Git Author: kp@FreeBSD.org
END