From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 903E0C433FE for ; Mon, 3 Oct 2022 07:35:23 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231546AbiJCHfV (ORCPT ); Mon, 3 Oct 2022 03:35:21 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:34808 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231809AbiJCHec (ORCPT ); Mon, 3 Oct 2022 03:34:32 -0400 Received: from ams.source.kernel.org (ams.source.kernel.org [IPv6:2604:1380:4601:e00::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id A2A0C52E5E; Mon, 3 Oct 2022 00:22:11 -0700 (PDT) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ams.source.kernel.org (Postfix) with ESMTPS id 63261B80E68; Mon, 3 Oct 2022 07:20:19 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id BA9C1C433D6; Mon, 3 Oct 2022 07:20:17 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1664781618; bh=SXP9nyNk5NtHD1ho0EXPJBi6RxYXVxyFXz9k3y7vsU0=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=zE5XH6OlMIWNJBbSlfeTQfb1HN7bNNmH5rYEKLn4jeSSpoPKEtjplOd8NhGnV22On x2BScNvD3Q3IiXZgT/lWkCG1EwSwNOsfZhS1MURzGRJ+heXntvpUaw76BUlhZxQKhP roOySSxw5cHPPDi4uwl7tCGTT2nsuswzW7248lyM= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Markus Theil , Stanislaw Gruszka , Hans de Goede , Johannes Berg , Sasha Levin Subject: [PATCH 5.15 61/83] wifi: mac80211: fix regression with non-QoS drivers Date: Mon, 3 Oct 2022 09:11:26 +0200 Message-Id: <20221003070723.529470949@linuxfoundation.org> X-Mailer: git-send-email 2.37.3 In-Reply-To: <20221003070721.971297651@linuxfoundation.org> References: <20221003070721.971297651@linuxfoundation.org> User-Agent: quilt/0.67 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Hans de Goede [ Upstream commit d873697ef2b7e1b6fdd8e9d449d9354bd5d29a4a ] Commit 10cb8e617560 ("mac80211: enable QoS support for nl80211 ctrl port") changed ieee80211_tx_control_port() to aways call __ieee80211_select_queue() without checking local->hw.queues. __ieee80211_select_queue() returns a queue-id between 0 and 3, which means that now ieee80211_tx_control_port() may end up setting the queue-mapping for a skb to a value higher then local->hw.queues if local->hw.queues is less then 4. Specifically this is a problem for ralink rt2500-pci cards where local->hw.queues is 2. There this causes rt2x00queue_get_tx_queue() to return NULL and the following error to be logged: "ieee80211 phy0: rt2x00mac_tx: Error - Attempt to send packet over invalid queue 2", after which association with the AP fails. Other callers of __ieee80211_select_queue() skip calling it when local->hw.queues < IEEE80211_NUM_ACS, add the same check to ieee80211_tx_control_port(). This fixes ralink rt2500-pci and similar cards when less then 4 tx-queues no longer working. Fixes: 10cb8e617560 ("mac80211: enable QoS support for nl80211 ctrl port") Cc: Markus Theil Suggested-by: Stanislaw Gruszka Signed-off-by: Hans de Goede Link: https://lore.kernel.org/r/20220918192052.443529-1-hdegoede@redhat.com Signed-off-by: Johannes Berg Signed-off-by: Sasha Levin --- net/mac80211/tx.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/net/mac80211/tx.c b/net/mac80211/tx.c index a499b07fee33..8f8dc2625d53 100644 --- a/net/mac80211/tx.c +++ b/net/mac80211/tx.c @@ -5719,6 +5719,9 @@ int ieee80211_tx_control_port(struct wiphy *wiphy, struct net_device *dev, skb_reset_network_header(skb); skb_reset_mac_header(skb); + if (local->hw.queues < IEEE80211_NUM_ACS) + goto start_xmit; + /* update QoS header to prioritize control port frames if possible, * priorization also happens for control port frames send over * AF_PACKET @@ -5734,6 +5737,7 @@ int ieee80211_tx_control_port(struct wiphy *wiphy, struct net_device *dev, rcu_read_unlock(); +start_xmit: /* mutex lock is only needed for incrementing the cookie counter */ mutex_lock(&local->mtx); -- 2.35.1