From: Eric Dumazet Date: Wed, 4 Mar 2026 01:56:40 +0000 (+0000) Subject: net_sched: sch_fq: clear q->band_pkt_count[] in fq_reset() X-Git-Tag: v7.0-rc3~39^2~17 X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=a4c2b8be2e5329e7fac6e8f64ddcb8958155cfcb;p=thirdparty%2Fkernel%2Fstable.git net_sched: sch_fq: clear q->band_pkt_count[] in fq_reset() When/if a NIC resets, queues are deactivated by dev_deactivate_many(), then reactivated when the reset operation completes. fq_reset() removes all the skbs from various queues. If we do not clear q->band_pkt_count[], these counters keep growing and can eventually reach sch->limit, preventing new packets to be queued. Many thanks to Praveen for discovering the root cause. Fixes: 29f834aa326e ("net_sched: sch_fq: add 3 bands and WRR scheduling") Diagnosed-by: Praveen Kaligineedi Signed-off-by: Eric Dumazet Reviewed-by: Neal Cardwell Reviewed-by: Willem de Bruijn Link: https://patch.msgid.link/20260304015640.961780-1-edumazet@google.com Signed-off-by: Jakub Kicinski --- diff --git a/net/sched/sch_fq.c b/net/sched/sch_fq.c index 80235e85f8440..05084c9af48e1 100644 --- a/net/sched/sch_fq.c +++ b/net/sched/sch_fq.c @@ -827,6 +827,7 @@ static void fq_reset(struct Qdisc *sch) for (idx = 0; idx < FQ_BANDS; idx++) { q->band_flows[idx].new_flows.first = NULL; q->band_flows[idx].old_flows.first = NULL; + q->band_pkt_count[idx] = 0; } q->delayed = RB_ROOT; q->flows = 0;