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 X-Spam-Level: X-Spam-Status: No, score=-10.1 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 1747CC76191 for ; Mon, 15 Jul 2019 15:15:45 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id E39A32054F for ; Mon, 15 Jul 2019 15:15:44 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1563203745; bh=KCYLOsGoG359+oREF2v3J7YYuSkQnjbjlMV7bKPIiJQ=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=rgwYIELQwwWkTY/wyyEHdAXcsW/Hn9NIEnL0VK6uLSIPWb6RkAjfSPHDNPLC7VbAU Jw3QCfFXDZpTwKWem7/qHwFyUVfwTMp5oOud2cdI5+heuDtrUM90ldVO4MRnjMY4uM 9DraP5tVBvgsPmV0yEXR99kocqj6y3hbcgX++p64= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730816AbfGONrS (ORCPT ); Mon, 15 Jul 2019 09:47:18 -0400 Received: from mail.kernel.org ([198.145.29.99]:55554 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1730012AbfGONrN (ORCPT ); Mon, 15 Jul 2019 09:47:13 -0400 Received: from sasha-vm.mshome.net (unknown [73.61.17.35]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 102622086C; Mon, 15 Jul 2019 13:47:09 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1563198432; bh=KCYLOsGoG359+oREF2v3J7YYuSkQnjbjlMV7bKPIiJQ=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=hDLwQA6sTmNq5rRDVDHpvgAdfKAN7MB02YIpkNBOHUTL5nEXDsbjSX9KlsV5AgrGR 7RP3dOrk/I3KaW83PKzceXPXreGk6GNA1L/WcSzdZyfkkxukZfmW2w4yfGxHv0ZYnz cGv6HK2Ydbb1tXCxS9o+bARNwCpOxffJkU3yAXN0= From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: =?UTF-8?q?Toke=20H=C3=B8iland-J=C3=B8rgensen?= , Miguel Catalan Cid , Kalle Valo , Sasha Levin , linux-wireless@vger.kernel.org, netdev@vger.kernel.org Subject: [PATCH AUTOSEL 5.2 004/249] ath9k: Don't trust TX status TID number when reporting airtime Date: Mon, 15 Jul 2019 09:42:49 -0400 Message-Id: <20190715134655.4076-4-sashal@kernel.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20190715134655.4076-1-sashal@kernel.org> References: <20190715134655.4076-1-sashal@kernel.org> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit Sender: netdev-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org From: Toke Høiland-Jørgensen [ Upstream commit 389b72e58259336c2d56d58b660b79cf4b9e0dcb ] As already noted a comment in ath_tx_complete_aggr(), the hardware will occasionally send a TX status with the wrong tid number. If we trust the value, airtime usage will be reported to the wrong AC, which can cause the deficit on that AC to become very low, blocking subsequent attempts to transmit. To fix this, account airtime usage to the TID number from the original skb, instead of the one in the hardware TX status report. Reported-by: Miguel Catalan Cid Signed-off-by: Toke Høiland-Jørgensen Signed-off-by: Kalle Valo Signed-off-by: Sasha Levin --- drivers/net/wireless/ath/ath9k/xmit.c | 7 ++++--- 1 file changed, 4 insertions(+), 3 deletions(-) diff --git a/drivers/net/wireless/ath/ath9k/xmit.c b/drivers/net/wireless/ath/ath9k/xmit.c index b17e1ca40995..3be0aeedb9b5 100644 --- a/drivers/net/wireless/ath/ath9k/xmit.c +++ b/drivers/net/wireless/ath/ath9k/xmit.c @@ -668,7 +668,8 @@ static bool bf_is_ampdu_not_probing(struct ath_buf *bf) static void ath_tx_count_airtime(struct ath_softc *sc, struct ieee80211_sta *sta, struct ath_buf *bf, - struct ath_tx_status *ts) + struct ath_tx_status *ts, + u8 tid) { u32 airtime = 0; int i; @@ -679,7 +680,7 @@ static void ath_tx_count_airtime(struct ath_softc *sc, airtime += rate_dur * bf->rates[i].count; } - ieee80211_sta_register_airtime(sta, ts->tid, airtime, 0); + ieee80211_sta_register_airtime(sta, tid, airtime, 0); } static void ath_tx_process_buffer(struct ath_softc *sc, struct ath_txq *txq, @@ -709,7 +710,7 @@ static void ath_tx_process_buffer(struct ath_softc *sc, struct ath_txq *txq, if (sta) { struct ath_node *an = (struct ath_node *)sta->drv_priv; tid = ath_get_skb_tid(sc, an, bf->bf_mpdu); - ath_tx_count_airtime(sc, sta, bf, ts); + ath_tx_count_airtime(sc, sta, bf, ts, tid->tidno); if (ts->ts_status & (ATH9K_TXERR_FILT | ATH9K_TXERR_XRETRY)) tid->clear_ps_filter = true; } -- 2.20.1