From nobody Thu Sep 18 23:33:36 2025 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 251FBC4332F for ; Fri, 2 Dec 2022 08:13:09 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232802AbiLBING (ORCPT ); Fri, 2 Dec 2022 03:13:06 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:55552 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232621AbiLBIMk (ORCPT ); Fri, 2 Dec 2022 03:12:40 -0500 Received: from metis.ext.pengutronix.de (metis.ext.pengutronix.de [IPv6:2001:67c:670:201:290:27ff:fe1d:cc33]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id C6087DF79 for ; Fri, 2 Dec 2022 00:12:37 -0800 (PST) Received: from drehscheibe.grey.stw.pengutronix.de ([2a0a:edc0:0:c01:1d::a2]) by metis.ext.pengutronix.de with esmtps (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1p119p-0005AT-Ti; Fri, 02 Dec 2022 09:12:29 +0100 Received: from [2a0a:edc0:0:1101:1d::28] (helo=dude02.red.stw.pengutronix.de) by drehscheibe.grey.stw.pengutronix.de with esmtp (Exim 4.94.2) (envelope-from ) id 1p119o-001lGv-ES; Fri, 02 Dec 2022 09:12:29 +0100 Received: from sha by dude02.red.stw.pengutronix.de with local (Exim 4.94.2) (envelope-from ) id 1p119m-00BfDm-Rg; Fri, 02 Dec 2022 09:12:26 +0100 From: Sascha Hauer To: linux-wireless@vger.kernel.org Cc: Neo Jou , Hans Ulli Kroll , Ping-Ke Shih , Yan-Hsuan Chuang , Kalle Valo , netdev@vger.kernel.org, linux-kernel@vger.kernel.org, Martin Blumenstingl , kernel@pengutronix.de, Alexander Hochbaum , Da Xue , Po-Hao Huang , Viktor Petrenko , Sascha Hauer Subject: [PATCH v5 05/11] wifi: rtw88: Drop coex mutex Date: Fri, 2 Dec 2022 09:12:18 +0100 Message-Id: <20221202081224.2779981-6-s.hauer@pengutronix.de> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20221202081224.2779981-1-s.hauer@pengutronix.de> References: <20221202081224.2779981-1-s.hauer@pengutronix.de> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-SA-Exim-Connect-IP: 2a0a:edc0:0:c01:1d::a2 X-SA-Exim-Mail-From: sha@pengutronix.de X-SA-Exim-Scanned: No (on metis.ext.pengutronix.de); SAEximRunCond expanded to false X-PTX-Original-Recipient: linux-kernel@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" coex->mutex is used in rtw_coex_info_request() only. Most callers of this function hold rtwdev->mutex already, except for one callsite in the debugfs code. The debugfs code alone doesn't justify the extra lock, so acquire rtwdev->mutex there as well and drop the now unnecessary spinlock. Signed-off-by: Sascha Hauer --- drivers/net/wireless/realtek/rtw88/coex.c | 3 +-- drivers/net/wireless/realtek/rtw88/debug.c | 2 ++ drivers/net/wireless/realtek/rtw88/main.c | 2 -- drivers/net/wireless/realtek/rtw88/main.h | 2 -- 4 files changed, 3 insertions(+), 6 deletions(-) diff --git a/drivers/net/wireless/realtek/rtw88/coex.c b/drivers/net/wirele= ss/realtek/rtw88/coex.c index 6276ad6242991..38697237ee5f0 100644 --- a/drivers/net/wireless/realtek/rtw88/coex.c +++ b/drivers/net/wireless/realtek/rtw88/coex.c @@ -633,7 +633,7 @@ static struct sk_buff *rtw_coex_info_request(struct rtw= _dev *rtwdev, struct rtw_coex *coex =3D &rtwdev->coex; struct sk_buff *skb_resp =3D NULL; =20 - mutex_lock(&coex->mutex); + lockdep_assert_held(&rtwdev->mutex); =20 rtw_fw_query_bt_mp_info(rtwdev, req); =20 @@ -650,7 +650,6 @@ static struct sk_buff *rtw_coex_info_request(struct rtw= _dev *rtwdev, } =20 out: - mutex_unlock(&coex->mutex); return skb_resp; } =20 diff --git a/drivers/net/wireless/realtek/rtw88/debug.c b/drivers/net/wirel= ess/realtek/rtw88/debug.c index f5b8a77ebc67b..fa3d73b333ba0 100644 --- a/drivers/net/wireless/realtek/rtw88/debug.c +++ b/drivers/net/wireless/realtek/rtw88/debug.c @@ -841,7 +841,9 @@ static int rtw_debugfs_get_coex_info(struct seq_file *m= , void *v) struct rtw_debugfs_priv *debugfs_priv =3D m->private; struct rtw_dev *rtwdev =3D debugfs_priv->rtwdev; =20 + mutex_lock(&rtwdev->mutex); rtw_coex_display_coex_info(rtwdev, m); + mutex_unlock(&rtwdev->mutex); =20 return 0; } diff --git a/drivers/net/wireless/realtek/rtw88/main.c b/drivers/net/wirele= ss/realtek/rtw88/main.c index c98e56890401c..0a2ce7f50f412 100644 --- a/drivers/net/wireless/realtek/rtw88/main.c +++ b/drivers/net/wireless/realtek/rtw88/main.c @@ -2071,7 +2071,6 @@ int rtw_core_init(struct rtw_dev *rtwdev) spin_lock_init(&rtwdev->tx_report.q_lock); =20 mutex_init(&rtwdev->mutex); - mutex_init(&rtwdev->coex.mutex); mutex_init(&rtwdev->hal.tx_power_mutex); =20 init_waitqueue_head(&rtwdev->coex.wait); @@ -2143,7 +2142,6 @@ void rtw_core_deinit(struct rtw_dev *rtwdev) } =20 mutex_destroy(&rtwdev->mutex); - mutex_destroy(&rtwdev->coex.mutex); mutex_destroy(&rtwdev->hal.tx_power_mutex); } EXPORT_SYMBOL(rtw_core_deinit); diff --git a/drivers/net/wireless/realtek/rtw88/main.h b/drivers/net/wirele= ss/realtek/rtw88/main.h index 4b57542bef1e9..77fd48b6cc453 100644 --- a/drivers/net/wireless/realtek/rtw88/main.h +++ b/drivers/net/wireless/realtek/rtw88/main.h @@ -1501,8 +1501,6 @@ struct rtw_coex_stat { }; =20 struct rtw_coex { - /* protects coex info request section */ - struct mutex mutex; struct sk_buff_head queue; wait_queue_head_t wait; =20 --=20 2.30.2