[PATCH 6.4 116/800] wifi: rtw88: unlock on error path in rtw_ops_add_interface()

Greg Kroah-Hartman
2023-07-16T19:59:37Z

From: Dan Carpenter <dan.carpenter@linaro.org>

[ Upstream commit e2ff1181b3d48257aab26bfd2165f3c7d271499f ]

Call mutex_unlock(&rtwdev->mutex); before returning on this error path.

Fixes: f0e741e4ddbc ("wifi: rtw88: add bitmap for dynamic port settings")
Signed-off-by: Dan Carpenter <dan.carpenter@linaro.org>
Reviewed-by: Ping-Ke Shih <pkshih@realtek.com>
Signed-off-by: Kalle Valo <kvalo@kernel.org>
Link: https://lore.kernel.org/r/ddd10a74-5982-4f65-8c59-c1cca558d239@kili.mountain
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/net/wireless/realtek/rtw88/mac80211.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/net/wireless/realtek/rtw88/mac80211.c b/drivers/net/wireless/realtek/rtw88/mac80211.c
index 144618bb94c86..09bcc2345bb05 100644
--- a/drivers/net/wireless/realtek/rtw88/mac80211.c
+++ b/drivers/net/wireless/realtek/rtw88/mac80211.c
@@ -164,8 +164,10 @@ static int rtw_ops_add_interface(struct ieee80211_hw *hw,
mutex_lock(&rtwdev->mutex);

port = find_first_zero_bit(rtwdev->hw_port, RTW_PORT_NUM);
- if (port >= RTW_PORT_NUM)
+ if (port >= RTW_PORT_NUM) {
+ mutex_unlock(&rtwdev->mutex);
return -EINVAL;
+ }
set_bit(port, rtwdev->hw_port);

rtwvif->port = port;
--
2.39.2