[PATCH 6.8 065/715] wifi: rtl8xxxu: add cancel_work_sync() for c2hcmd_work

From: Sasha Levin
Date: Sun Mar 24 2024 - 18:50:40 EST


From: Martin Kaistra <martin.kaistra@xxxxxxxxxxxxx>

[ Upstream commit 1213acb478a7181cd73eeaf00db430f1e45b1361 ]

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@xxxxxxxxxxxxx>
Reviewed-by: Ping-Ke Shih <pkshih@xxxxxxxxxxx>
Signed-off-by: Kalle Valo <kvalo@xxxxxxxxxx>
Link: https://msgid.link/20240111163628.320697-2-martin.kaistra@xxxxxxxxxxxxx
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
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 180907319e8cd..04df0f54aa667 100644
--- a/drivers/net/wireless/realtek/rtl8xxxu/rtl8xxxu_core.c
+++ b/drivers/net/wireless/realtek/rtl8xxxu/rtl8xxxu_core.c
@@ -7304,6 +7304,7 @@ 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);
--
2.43.0