From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 1C2EB28E572; Wed, 7 May 2025 19:06:14 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1746644774; cv=none; b=urEaimqPF5TST8UPN7MW3BAaoJLMGSQUZaCp2zx80Nej1sFcoifr/4dn7lk2UWM3h6dl0z/N9peUopX0VlOuZYYp/MMiTUt6fcNQ4PJyL9WdwcUfkFYuH1KEQ5dldlWZPmsDcO/Gt0Fi8Q30rv1jGFqc82emvbdPNkZDy0+GsGQ= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1746644774; c=relaxed/simple; bh=lzWQ+UIaoaPxhJwFOQuWvta4gpm2sEl6uOl7WsRtSVk=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=EbFwFJiHAhc7rJVg1CBGMrCNx0qNyVN/plfuTGlwhsXC/UFKLkH6ESLL++NGcXg2WHPCnvtqehlHJnbtUyPA8P7bmJUMhoNjbCZHQDHSadgbWc8PC0uHGMU8WNW1l2LnuJiA8dmvK2Em7SvZwSWLuahqKPiKAhsdtM9MKlfyBUw= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=wvxGnUFz; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="wvxGnUFz" Received: by smtp.kernel.org (Postfix) with ESMTPSA id A4AD1C4CEE2; Wed, 7 May 2025 19:06:13 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1746644774; bh=lzWQ+UIaoaPxhJwFOQuWvta4gpm2sEl6uOl7WsRtSVk=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=wvxGnUFzLs8frnA0o1aL/NbcENNHM6P04o6dD4u2IGetc9dlp13uwkxCNkWH96AXE plJ9PFlWh2Uh7/q696MI1emKbbGc9C7vgZx4Akr8rx5vHO0EfYmU9D0d4SC4iWtsCD dH1vLYW0M+9iYYexkrbd9A4PL56gi/+t10JiA+Sg= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Gerrard Tai , Cong Wang , Jamal Hadi Salim , Paolo Abeni Subject: [PATCH 6.12 151/164] sch_ets: make est_qlen_notify() idempotent Date: Wed, 7 May 2025 20:40:36 +0200 Message-ID: <20250507183827.082552404@linuxfoundation.org> X-Mailer: git-send-email 2.49.0 In-Reply-To: <20250507183820.781599563@linuxfoundation.org> References: <20250507183820.781599563@linuxfoundation.org> User-Agent: quilt/0.68 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 6.12-stable review patch. If anyone has any objections, please let me know. ------------------ From: Cong Wang commit a7a15f39c682ac4268624da2abdb9114bdde96d5 upstream. est_qlen_notify() deletes its class from its active list with list_del() when qlen is 0, therefore, it is not idempotent and not friendly to its callers, like fq_codel_dequeue(). Let's make it idempotent to ease qdisc_tree_reduce_backlog() callers' life. Also change other list_del()'s to list_del_init() just to be extra safe. Reported-by: Gerrard Tai Signed-off-by: Cong Wang Link: https://patch.msgid.link/20250403211033.166059-6-xiyou.wangcong@gmail.com Acked-by: Jamal Hadi Salim Signed-off-by: Paolo Abeni Signed-off-by: Greg Kroah-Hartman --- net/sched/sch_ets.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) --- a/net/sched/sch_ets.c +++ b/net/sched/sch_ets.c @@ -298,7 +298,7 @@ static void ets_class_qlen_notify(struct * to remove them. */ if (!ets_class_is_strict(q, cl) && sch->q.qlen) - list_del(&cl->alist); + list_del_init(&cl->alist); } static int ets_class_dump(struct Qdisc *sch, unsigned long arg, @@ -491,7 +491,7 @@ static struct sk_buff *ets_qdisc_dequeue if (unlikely(!skb)) goto out; if (cl->qdisc->q.qlen == 0) - list_del(&cl->alist); + list_del_init(&cl->alist); return ets_qdisc_dequeue_skb(sch, skb); } @@ -660,7 +660,7 @@ static int ets_qdisc_change(struct Qdisc } for (i = q->nbands; i < oldbands; i++) { if (i >= q->nstrict && q->classes[i].qdisc->q.qlen) - list_del(&q->classes[i].alist); + list_del_init(&q->classes[i].alist); qdisc_tree_flush_backlog(q->classes[i].qdisc); } WRITE_ONCE(q->nstrict, nstrict); @@ -716,7 +716,7 @@ static void ets_qdisc_reset(struct Qdisc for (band = q->nstrict; band < q->nbands; band++) { if (q->classes[band].qdisc->q.qlen) - list_del(&q->classes[band].alist); + list_del_init(&q->classes[band].alist); } for (band = 0; band < q->nbands; band++) qdisc_reset(q->classes[band].qdisc);