From: Martin Kaistra <martin.kaistra@linutronix.de>
To: linux-wireless@vger.kernel.org
Cc: Jes Sorensen <Jes.Sorensen@gmail.com>,
Kalle Valo <kvalo@kernel.org>, Ping-Ke Shih <pkshih@realtek.com>,
Bitterblue Smith <rtl8821cerfe2@gmail.com>,
Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Subject: [PATCH v3 1/2] wifi: rtl8xxxu: add cancel_work_sync() for c2hcmd_work
Date: Thu, 11 Jan 2024 17:36:27 +0100 [thread overview]
Message-ID: <20240111163628.320697-2-martin.kaistra@linutronix.de> (raw)
In-Reply-To: <20240111163628.320697-1-martin.kaistra@linutronix.de>
The workqueue might still be running, when the driver is stopped. To
avoid a use-after-free, call cancel_work_sync() in rtl8xxxu_stop().
Fixes: e542e66b7c2e ("rtl8xxxu: add bluetooth co-existence support for single antenna")
Signed-off-by: Martin Kaistra <martin.kaistra@linutronix.de>
---
drivers/net/wireless/realtek/rtl8xxxu/rtl8xxxu_core.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/drivers/net/wireless/realtek/rtl8xxxu/rtl8xxxu_core.c b/drivers/net/wireless/realtek/rtl8xxxu/rtl8xxxu_core.c
index aac5940936290..757ebd46452eb 100644
--- a/drivers/net/wireless/realtek/rtl8xxxu/rtl8xxxu_core.c
+++ b/drivers/net/wireless/realtek/rtl8xxxu/rtl8xxxu_core.c
@@ -7480,6 +7480,7 @@ static void rtl8xxxu_stop(struct ieee80211_hw *hw)
if (priv->usb_interrupts)
rtl8xxxu_write32(priv, REG_USB_HIMR, 0);
+ cancel_work_sync(&priv->c2hcmd_work);
cancel_delayed_work_sync(&priv->ra_watchdog);
rtl8xxxu_free_rx_resources(priv);
--
2.39.2
next prev parent reply other threads:[~2024-01-11 16:36 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-01-11 16:36 [PATCH v3 0/2] wifi: rtl8xxxu: channel switch support Martin Kaistra
2024-01-11 16:36 ` Martin Kaistra [this message]
2024-01-12 0:14 ` [PATCH v3 1/2] wifi: rtl8xxxu: add cancel_work_sync() for c2hcmd_work Ping-Ke Shih
2024-01-14 19:10 ` Kalle Valo
2024-01-11 16:36 ` [PATCH v3 2/2] wifi: rtl8xxxu: enable channel switch support Martin Kaistra
2024-01-12 0:14 ` Ping-Ke Shih
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