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/
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