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Message-Id: <20220518082318.3898514-5-s.hauer@pengutronix.de>
Date: Wed, 18 May 2022 10:23:12 +0200
From: Sascha Hauer <s.hauer@...gutronix.de>
To: linux-wireless@...r.kernel.org
Cc: Neo Jou <neojou@...il.com>, Hans Ulli Kroll <linux@...i-kroll.de>,
Ping-Ke Shih <pkshih@...ltek.com>,
Yan-Hsuan Chuang <tony0620emma@...il.com>,
Kalle Valo <kvalo@...nel.org>, netdev@...r.kernel.org,
linux-kernel@...r.kernel.org,
Martin Blumenstingl <martin.blumenstingl@...glemail.com>,
kernel@...gutronix.de, Johannes Berg <johannes@...solutions.net>,
Sascha Hauer <s.hauer@...gutronix.de>
Subject: [PATCH 04/10] rtw88: Drop coex mutex
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 <s.hauer@...gutronix.de>
---
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;
--
2.30.2
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