Re: [PATCH stable 5.4.y, 4.19.y] net: dsa: tag_mtk: fix 802.1ad VLAN egress

On Thu, Mar 18, 2021 at 01:29:35PM +0800, DENG Qingfang wrote:

[ Upstream commit 9200f515c41f4cbaeffd8fdd1d8b6373a18b1b67 ]

A different TPID bit is used for 802.1ad VLAN frames.

Reported-by: Ilario Gelmetti <redacted>
Fixes: f0af34317f4b ("net: dsa: mediatek: combine MediaTek tag with VLAN tag")
Signed-off-by: DENG Qingfang <dqfext@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
 net/dsa/tag_mtk.c | 19 +++++++++++++------
 1 file changed, 13 insertions(+), 6 deletions(-)

Thanks for the backport, now queued up.

greg k-h