From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 5C7A633BBC5 for ; Thu, 17 Sep 2026 01:51:07 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789609868; cv=none; b=nmgaJeh3hlKy8rcm2iSiigyC4R6Oa2uUZYSQmlxtWg7YrSEkXNBRTP1bWdIL49ez4mp3YAyQdN6wTTyB8ytn2OK6GzhmTM1rSURJAPMt6PEDExmLCkI8xlVuS2qBps3mBbNwBbojzgYA9s9yBH6zBY6ZPft9T7dQBdCDqzuLQeA= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789609868; c=relaxed/simple; bh=FDP7VT+lU0NNOfPFWdJUMSAvzlv1zLdsXN54KK0bB10=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=AQZLweThCZUoK5ZRaRnrWonrZi509CSYHwjAVMTaHH6uQmN+jpEXIlJTI/MnViioDiwzmvwc2lTLn5FcyQacSg9R6s11NIEt6ivSdJa+ovRFj1ACxkJ9dJ+dBfZmrUitsQHlXQdNji1OPkzIF3I+Wup+AQihwwii/O0Yu/vjaso= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=R7PkLYhJ; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="R7PkLYhJ" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 805E11F000FF; Thu, 17 Sep 2026 01:51:06 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1789609866; bh=BaHtXFOk7uwxxtmD0+Oh/MihRcTdzZrEsKzz/2TAmpc=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=R7PkLYhJYUg0e5D/MuwLPSTktsaeB/lxYX6xlfVosPrkC15cWFMhPy7Bv2tYdXXcw 95QOf/TNQc4h2um87hTIkX8BO+KdAvBqy5Zm42HvQNCQQAuXp76gRJpXw2L4WVVIrB aCZtg8mbJHkU7aOu2lRi6gHTSkC9ygzomXILTSA1sWqXz4a4aN44HGB8QTVoO1uPiq Lo+E395BR1Hwja1da6Xmy8ieQb4AR/maKiXGhOPhoZxVRHZCpPMx5Kj4WdsZ8SrN37 5txevh+Hyoo5cbWd4OdAM5mqgOAe58WYONBpmhEyr+hiQmKuSOD5f1FT2OidDx0PIt VyINH/9yyS8ng== From: Sasha Levin To: stable@vger.kernel.org Cc: Guenter Roeck , Sasha Levin Subject: [PATCH 6.12.y 1/3] hwmon: (asus_rog_ryujin) Rely on subsystem locking Date: Wed, 16 Sep 2026 21:51:03 -0400 Message-ID: <20260917015105.3705183-1-sashal@kernel.org> X-Mailer: git-send-email 2.53.0 In-Reply-To: <2026091604-activism-jackpot-afcf@gregkh> References: <2026091604-activism-jackpot-afcf@gregkh> Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit From: Guenter Roeck [ Upstream commit b4306c0c8e24f9e031185fb87de45391bc8c7fe9 ] Attribute access is now serialized in the hardware monitoring core, so locking in the driver code is no longer necessary. Drop it. Signed-off-by: Guenter Roeck Stable-dep-of: 8042312e73c5 ("hwmon: (asus_rog_ryujin) Validate HID report lengths") Signed-off-by: Sasha Levin --- drivers/hwmon/asus_rog_ryujin.c | 48 +++++++-------------------------- 1 file changed, 9 insertions(+), 39 deletions(-) diff --git a/drivers/hwmon/asus_rog_ryujin.c b/drivers/hwmon/asus_rog_ryujin.c index e5e93a20723c4..10a1f5aca988d 100644 --- a/drivers/hwmon/asus_rog_ryujin.c +++ b/drivers/hwmon/asus_rog_ryujin.c @@ -81,10 +81,6 @@ static const char *const rog_ryujin_speed_label[] = { struct rog_ryujin_data { struct hid_device *hdev; struct device *hwmon_dev; - /* For locking access to buffer */ - struct mutex buffer_lock; - /* For queueing multiple readers */ - struct mutex status_report_request_mutex; /* For reinitializing the completions below */ spinlock_t status_report_request_lock; struct completion cooler_status_received; @@ -153,18 +149,10 @@ static umode_t rog_ryujin_is_visible(const void *data, /* Writes the command to the device with the rest of the report filled with zeroes */ static int rog_ryujin_write_expanded(struct rog_ryujin_data *priv, const u8 *cmd, int cmd_length) { - int ret; - - mutex_lock(&priv->buffer_lock); - memcpy_and_pad(priv->buffer, MAX_REPORT_LENGTH, cmd, cmd_length, 0x00); - ret = hid_hw_output_report(priv->hdev, priv->buffer, MAX_REPORT_LENGTH); - - mutex_unlock(&priv->buffer_lock); - return ret; + return hid_hw_output_report(priv->hdev, priv->buffer, MAX_REPORT_LENGTH); } -/* Assumes priv->status_report_request_mutex is locked */ static int rog_ryujin_execute_cmd(struct rog_ryujin_data *priv, const u8 *cmd, int cmd_length, struct completion *status_completion) { @@ -196,14 +184,11 @@ static int rog_ryujin_execute_cmd(struct rog_ryujin_data *priv, const u8 *cmd, i static int rog_ryujin_get_status(struct rog_ryujin_data *priv) { - int ret = mutex_lock_interruptible(&priv->status_report_request_mutex); - - if (ret < 0) - return ret; + int ret; if (!time_after(jiffies, priv->updated + msecs_to_jiffies(STATUS_VALIDITY))) { /* Data is up to date */ - goto unlock_and_return; + return 0; } /* Retrieve cooler status */ @@ -211,36 +196,30 @@ static int rog_ryujin_get_status(struct rog_ryujin_data *priv) rog_ryujin_execute_cmd(priv, get_cooler_status_cmd, GET_CMD_LENGTH, &priv->cooler_status_received); if (ret < 0) - goto unlock_and_return; + return ret; /* Retrieve controller status (speeds) */ ret = rog_ryujin_execute_cmd(priv, get_controller_speed_cmd, GET_CMD_LENGTH, &priv->controller_status_received); if (ret < 0) - goto unlock_and_return; + return ret; /* Retrieve cooler duty */ ret = rog_ryujin_execute_cmd(priv, get_cooler_duty_cmd, GET_CMD_LENGTH, &priv->cooler_duty_received); if (ret < 0) - goto unlock_and_return; + return ret; /* Retrieve controller duty */ ret = rog_ryujin_execute_cmd(priv, get_controller_duty_cmd, GET_CMD_LENGTH, &priv->controller_duty_received); - if (ret < 0) - goto unlock_and_return; - - priv->updated = jiffies; - -unlock_and_return: - mutex_unlock(&priv->status_report_request_mutex); if (ret < 0) return ret; + priv->updated = jiffies; return 0; } @@ -303,14 +282,11 @@ static int rog_ryujin_write_fixed_duty(struct rog_ryujin_data *priv, int channel * Retrieve cooler duty since both pump and internal fan are set * together, then write back with one of them modified. */ - ret = mutex_lock_interruptible(&priv->status_report_request_mutex); - if (ret < 0) - return ret; ret = rog_ryujin_execute_cmd(priv, get_cooler_duty_cmd, GET_CMD_LENGTH, &priv->cooler_duty_received); if (ret < 0) - goto unlock_and_return; + return ret; memcpy(set_cmd, set_cooler_duty_cmd, SET_CMD_LENGTH); @@ -329,11 +305,7 @@ static int rog_ryujin_write_fixed_duty(struct rog_ryujin_data *priv, int channel set_cmd[RYUJIN_SET_COOLER_FAN_DUTY_OFFSET] = val; } - ret = rog_ryujin_execute_cmd(priv, set_cmd, SET_CMD_LENGTH, &priv->cooler_duty_set); -unlock_and_return: - mutex_unlock(&priv->status_report_request_mutex); - if (ret < 0) - return ret; + return rog_ryujin_execute_cmd(priv, set_cmd, SET_CMD_LENGTH, &priv->cooler_duty_set); } else { /* * Controller fan duty (channel == 2). No need to retrieve current @@ -538,8 +510,6 @@ static int rog_ryujin_probe(struct hid_device *hdev, const struct hid_device_id goto fail_and_close; } - mutex_init(&priv->status_report_request_mutex); - mutex_init(&priv->buffer_lock); spin_lock_init(&priv->status_report_request_lock); init_completion(&priv->cooler_status_received); init_completion(&priv->controller_status_received); -- 2.53.0