From patchwork Wed May 18 08:23:12 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sascha Hauer X-Patchwork-Id: 574515 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 96BD9C433F5 for ; Wed, 18 May 2022 08:23:49 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233103AbiERIXs (ORCPT ); Wed, 18 May 2022 04:23:48 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:37278 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233028AbiERIXg (ORCPT ); Wed, 18 May 2022 04:23:36 -0400 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 4403510789E for ; Wed, 18 May 2022 01:23:33 -0700 (PDT) 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 1nrExn-0004R5-16; Wed, 18 May 2022 10:23:23 +0200 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 1nrExn-0032pO-HA; Wed, 18 May 2022 10:23:22 +0200 Received: from sha by dude02.red.stw.pengutronix.de with local (Exim 4.94.2) (envelope-from ) id 1nrExj-00GXTg-Uh; Wed, 18 May 2022 10:23:19 +0200 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, Johannes Berg , Sascha Hauer Subject: [PATCH 04/10] rtw88: Drop coex mutex Date: Wed, 18 May 2022 10:23:12 +0200 Message-Id: <20220518082318.3898514-5-s.hauer@pengutronix.de> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20220518082318.3898514-1-s.hauer@pengutronix.de> References: <20220518082318.3898514-1-s.hauer@pengutronix.de> MIME-Version: 1.0 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-wireless@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-wireless@vger.kernel.org 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/wireless/realtek/rtw88/coex.c index cac053f485c3b..b156f8c48ffbb 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 = &rtwdev->coex; struct sk_buff *skb_resp = NULL; - mutex_lock(&coex->mutex); + lockdep_assert_held(&rtwdev->mutex); rtw_fw_query_bt_mp_info(rtwdev, req); @@ -650,7 +650,6 @@ static struct sk_buff *rtw_coex_info_request(struct rtw_dev *rtwdev, } out: - mutex_unlock(&coex->mutex); return skb_resp; } diff --git a/drivers/net/wireless/realtek/rtw88/debug.c b/drivers/net/wireless/realtek/rtw88/debug.c index 79939aa6b752c..1453a32ea3ef0 100644 --- a/drivers/net/wireless/realtek/rtw88/debug.c +++ b/drivers/net/wireless/realtek/rtw88/debug.c @@ -842,7 +842,9 @@ static int rtw_debugfs_get_coex_info(struct seq_file *m, void *v) struct rtw_debugfs_priv *debugfs_priv = m->private; struct rtw_dev *rtwdev = debugfs_priv->rtwdev; + mutex_lock(&rtwdev->mutex); rtw_coex_display_coex_info(rtwdev, m); + mutex_unlock(&rtwdev->mutex); return 0; } diff --git a/drivers/net/wireless/realtek/rtw88/main.c b/drivers/net/wireless/realtek/rtw88/main.c index baf4d29fde678..5afb8bef9696a 100644 --- a/drivers/net/wireless/realtek/rtw88/main.c +++ b/drivers/net/wireless/realtek/rtw88/main.c @@ -1998,7 +1998,6 @@ int rtw_core_init(struct rtw_dev *rtwdev) spin_lock_init(&rtwdev->tx_report.q_lock); mutex_init(&rtwdev->mutex); - mutex_init(&rtwdev->coex.mutex); mutex_init(&rtwdev->hal.tx_power_mutex); init_waitqueue_head(&rtwdev->coex.wait); @@ -2066,7 +2065,6 @@ void rtw_core_deinit(struct rtw_dev *rtwdev) } 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/wireless/realtek/rtw88/main.h index 619ee6e8d2807..fc27066a67a72 100644 --- a/drivers/net/wireless/realtek/rtw88/main.h +++ b/drivers/net/wireless/realtek/rtw88/main.h @@ -1507,8 +1507,6 @@ struct rtw_coex_stat { }; struct rtw_coex { - /* protects coex info request section */ - struct mutex mutex; struct sk_buff_head queue; wait_queue_head_t wait;