linux-kernel - [PATCH v2] wifi: rtw89: Add missing check for alloc

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Message-Id: <20230104142901.1611-1-jiasheng@iscas.ac.cn>
Date:   Wed,  4 Jan 2023 22:29:01 +0800
From:   Jiasheng Jiang <jiasheng@...as.ac.cn>
To:     leon@...nel.org
Cc:     pkshih@...ltek.com, kvalo@...nel.org, davem@...emloft.net,
        edumazet@...gle.com, kuba@...nel.org, pabeni@...hat.com,
        linux-wireless@...r.kernel.org, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org, Jiasheng Jiang <jiasheng@...as.ac.cn>
Subject: [PATCH v2] wifi: rtw89: Add missing check for alloc_workqueue

Add check for the return value of alloc_workqueue since it may return
NULL pointer.
Moreover, add destroy_workqueue when rtw89_load_firmware fails.

Fixes: e3ec7017f6a2 ("rtw89: add Realtek 802.11ax driver")
Signed-off-by: Jiasheng Jiang <jiasheng@...as.ac.cn>
---
CHangelog:

v1 -> v2:

1. Add destroy_workqueue when rtw89_load_firmware fails.
---
 drivers/net/wireless/realtek/rtw89/core.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/net/wireless/realtek/rtw89/core.c b/drivers/net/wireless/realtek/rtw89/core.c
index 931aff8b5dc9..e99eccf11c76 100644
--- a/drivers/net/wireless/realtek/rtw89/core.c
+++ b/drivers/net/wireless/realtek/rtw89/core.c
@@ -3124,6 +3124,8 @@ int rtw89_core_init(struct rtw89_dev *rtwdev)
 	INIT_DELAYED_WORK(&rtwdev->cfo_track_work, rtw89_phy_cfo_track_work);
 	INIT_DELAYED_WORK(&rtwdev->forbid_ba_work, rtw89_forbid_ba_work);
 	rtwdev->txq_wq = alloc_workqueue("rtw89_tx_wq", WQ_UNBOUND | WQ_HIGHPRI, 0);
+	if (!rtwdev->txq_wq)
+		return -ENOMEM;
 	spin_lock_init(&rtwdev->ba_lock);
 	spin_lock_init(&rtwdev->rpwm_lock);
 	mutex_init(&rtwdev->mutex);
@@ -3149,6 +3151,7 @@ int rtw89_core_init(struct rtw89_dev *rtwdev)
 	ret = rtw89_load_firmware(rtwdev);
 	if (ret) {
 		rtw89_warn(rtwdev, "no firmware loaded\n");
+		destroy_workqueue(rtwdev->txq_wq);
 		return ret;
 	}
 	rtw89_ser_init(rtwdev);
-- 
2.25.1