[PATCH net] net: airoha: fix ETS channel derivation in airoha_tc_setup_qdisc_ets()

[Simon Horman]

On Sat, Jul 04, 2026 at 04:21:38PM +0200, Lorenzo Bianconi wrote:
> Derive the hardware QoS channel from opt->parent instead of opt->handle
> in airoha_tc_setup_qdisc_ets(). The ETS qdisc handle is either
> user-specified or auto-allocated by qdisc_alloc_handle() and bears no
> relation to the HTB leaf classid that identifies the hardware channel.
> HTB derives the channel from TC_H_MIN(opt->classid), and ETS is always
> attached as a child of an HTB leaf, so its opt->parent matches that
> classid. Using opt->handle instead can cause two ETS qdiscs on different
> HTB leaves to collide on the same hardware channel, corrupting scheduler
> configuration and stats.
> 
> Fixes: 20bf7d07c956 ("net: airoha: Add sched ETS offload support")
> Signed-off-by: Lorenzo Bianconi <lorenzo at kernel.org>

Reviewed-by: Simon Horman <horms at kernel.org>