netdev - RE: [PATCH net-next 1/2] net: stmmac: fix tc flower deletion for VLAN priority Rx steering

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Date:   Sat, 11 Dec 2021 13:59:29 +0000
From:   "Ong, Boon Leong" <boon.leong.ong@...el.com>
To:     Yannick Vignon <yannick.vignon@....nxp.com>,
        Giuseppe Cavallaro <peppe.cavallaro@...com>,
        Alexandre Torgue <alexandre.torgue@...com>,
        "Jose Abreu" <joabreu@...opsys.com>,
        "David S . Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        Maxime Coquelin <mcoquelin.stm32@...il.com>,
        "alexandre.torgue@...s.st.com" <alexandre.torgue@...s.st.com>,
        "Kanzenbach, Kurt" <kurt.kanzenbach@...utronix.de>
CC:     "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        "linux-stm32@...md-mailman.stormreply.com" 
        <linux-stm32@...md-mailman.stormreply.com>,
        "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>
Subject: RE: [PATCH net-next 1/2] net: stmmac: fix tc flower deletion for VLAN
 priority Rx steering

>I was about to post a very similar fix for that same problem (except I
>was adding support for other packet steering types)...
>I can confirm your patch works. 

Thanks for testing it. 

>Note that a simpler way to reproduce is
>simply to add a filter, then remove all the filters, e.g.:
>$ IFDEVNAME=eth0
>$ tc qdisc add dev $IFDEVNAME ingress
>$ tc qdisc add dev $IFDEVNAME root mqprio num_tc 8 \
>    map 0 1 2 3 4 5 6 7 0 0 0 0 0 0 0 0 \
>    queues 1@0 1@1 1@2 1@3 1@4 1@5 1@6 1@7 hw 0
>$ tc filter add dev $IFDEVNAME parent ffff: protocol 802.1Q \
>    flower vlan_prio 0 hw_tc 0
>$ tc filter del dev $IFDEVNAME ingress
 
Yes, you are right above. I will resend v2 for this patch
to fix the comment given by Sebastian on "net" patch version
here: https://patchwork.kernel.org/project/netdevbpf/patch/20211209130335.81114-1-boon.leong.ong@intel.com/