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[2620:137:e000::1:20]) by mx.google.com with ESMTP id g19-20020a056402091300b00467881469dbsi11436391edz.242.2022.11.22.06.56.05; Tue, 22 Nov 2022 06:56:29 -0800 (PST) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20; Authentication-Results: mx.google.com; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233879AbiKVOxq (ORCPT + 99 others); Tue, 22 Nov 2022 09:53:46 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:39140 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233553AbiKVOxD (ORCPT ); Tue, 22 Nov 2022 09:53:03 -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 3B2CB18B2F for ; Tue, 22 Nov 2022 06:52:54 -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 1oxUdc-0006Lf-4z; Tue, 22 Nov 2022 15:52:40 +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 1oxUdY-005s7P-3F; Tue, 22 Nov 2022 15:52:37 +0100 Received: from sha by dude02.red.stw.pengutronix.de with local (Exim 4.94.2) (envelope-from ) id 1oxUdX-00H3kf-LO; Tue, 22 Nov 2022 15:52:35 +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, Johannes Berg , Alexander Hochbaum , Da Xue , Po-Hao Huang , Viktor Petrenko , Sascha Hauer Subject: [PATCH v3 04/11] rtw88: Drop h2c.lock Date: Tue, 22 Nov 2022 15:52:19 +0100 Message-Id: <20221122145226.4065843-5-s.hauer@pengutronix.de> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20221122145226.4065843-1-s.hauer@pengutronix.de> References: <20221122145226.4065843-1-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-kernel@vger.kernel.org X-Spam-Status: No, score=-4.2 required=5.0 tests=BAYES_00,RCVD_IN_DNSWL_MED, SPF_HELO_NONE,SPF_PASS autolearn=unavailable autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org X-getmail-retrieved-from-mailbox: =?utf-8?q?INBOX?= X-GMAIL-THRID: =?utf-8?q?1750208599863571931?= X-GMAIL-MSGID: =?utf-8?q?1750208599863571931?= The h2c.lock spinlock is used in rtw_fw_send_h2c_command() and rtw_fw_send_h2c_packet(). Most callers call this with rtwdev->mutex held, except from one callsite in the debugfs code. The debugfs code alone doesn't justify the extra lock, so acquire rtwdev->mutex in debugfs and drop the now unnecessary spinlock. Signed-off-by: Sascha Hauer --- drivers/net/wireless/realtek/rtw88/debug.c | 2 ++ drivers/net/wireless/realtek/rtw88/fw.c | 13 ++++--------- drivers/net/wireless/realtek/rtw88/main.c | 1 - drivers/net/wireless/realtek/rtw88/main.h | 2 -- 4 files changed, 6 insertions(+), 12 deletions(-) diff --git a/drivers/net/wireless/realtek/rtw88/debug.c b/drivers/net/wireless/realtek/rtw88/debug.c index 70e19f2a1a355..f5b8a77ebc67b 100644 --- a/drivers/net/wireless/realtek/rtw88/debug.c +++ b/drivers/net/wireless/realtek/rtw88/debug.c @@ -392,7 +392,9 @@ static ssize_t rtw_debugfs_set_h2c(struct file *filp, return -EINVAL; } + mutex_lock(&rtwdev->mutex); rtw_fw_h2c_cmd_dbg(rtwdev, param); + mutex_unlock(&rtwdev->mutex); return count; } diff --git a/drivers/net/wireless/realtek/rtw88/fw.c b/drivers/net/wireless/realtek/rtw88/fw.c index 0b5f903c0f366..a58c80d4825b1 100644 --- a/drivers/net/wireless/realtek/rtw88/fw.c +++ b/drivers/net/wireless/realtek/rtw88/fw.c @@ -322,7 +322,7 @@ static void rtw_fw_send_h2c_command(struct rtw_dev *rtwdev, h2c[3], h2c[2], h2c[1], h2c[0], h2c[7], h2c[6], h2c[5], h2c[4]); - spin_lock(&rtwdev->h2c.lock); + lockdep_assert_held(&rtwdev->mutex); box = rtwdev->h2c.last_box_num; switch (box) { @@ -344,7 +344,7 @@ static void rtw_fw_send_h2c_command(struct rtw_dev *rtwdev, break; default: WARN(1, "invalid h2c mail box number\n"); - goto out; + return; } ret = read_poll_timeout_atomic(rtw_read8, box_state, @@ -353,7 +353,7 @@ static void rtw_fw_send_h2c_command(struct rtw_dev *rtwdev, if (ret) { rtw_err(rtwdev, "failed to send h2c command\n"); - goto out; + return; } for (idx = 0; idx < 4; idx++) @@ -363,9 +363,6 @@ static void rtw_fw_send_h2c_command(struct rtw_dev *rtwdev, if (++rtwdev->h2c.last_box_num >= 4) rtwdev->h2c.last_box_num = 0; - -out: - spin_unlock(&rtwdev->h2c.lock); } void rtw_fw_h2c_cmd_dbg(struct rtw_dev *rtwdev, u8 *h2c) @@ -377,15 +374,13 @@ static void rtw_fw_send_h2c_packet(struct rtw_dev *rtwdev, u8 *h2c_pkt) { int ret; - spin_lock(&rtwdev->h2c.lock); + lockdep_assert_held(&rtwdev->mutex); FW_OFFLOAD_H2C_SET_SEQ_NUM(h2c_pkt, rtwdev->h2c.seq); ret = rtw_hci_write_data_h2c(rtwdev, h2c_pkt, H2C_PKT_SIZE); if (ret) rtw_err(rtwdev, "failed to send h2c packet\n"); rtwdev->h2c.seq++; - - spin_unlock(&rtwdev->h2c.lock); } void diff --git a/drivers/net/wireless/realtek/rtw88/main.c b/drivers/net/wireless/realtek/rtw88/main.c index 710ddb0283c82..c98e56890401c 100644 --- a/drivers/net/wireless/realtek/rtw88/main.c +++ b/drivers/net/wireless/realtek/rtw88/main.c @@ -2067,7 +2067,6 @@ int rtw_core_init(struct rtw_dev *rtwdev) skb_queue_head_init(&rtwdev->coex.queue); skb_queue_head_init(&rtwdev->tx_report.queue); - spin_lock_init(&rtwdev->h2c.lock); spin_lock_init(&rtwdev->txq_lock); spin_lock_init(&rtwdev->tx_report.q_lock); diff --git a/drivers/net/wireless/realtek/rtw88/main.h b/drivers/net/wireless/realtek/rtw88/main.h index f24d17f482aaa..4b57542bef1e9 100644 --- a/drivers/net/wireless/realtek/rtw88/main.h +++ b/drivers/net/wireless/realtek/rtw88/main.h @@ -2020,8 +2020,6 @@ struct rtw_dev { struct { /* incicate the mail box to use with fw */ u8 last_box_num; - /* protect to send h2c to fw */ - spinlock_t lock; u32 seq; } h2c;