netdev - Re: [PATCH] wifi: rtw89: Add missing check for alloc

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Message-ID: <Y7Vl8CHL935On/7o@unreal>
Date:   Wed, 4 Jan 2023 13:41:36 +0200
From:   Leon Romanovsky <leon@...nel.org>
To:     Jiasheng Jiang <jiasheng@...as.ac.cn>
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
Subject: Re: [PATCH] wifi: rtw89: Add missing check for alloc_workqueue

On Wed, Jan 04, 2023 at 05:33:53PM +0800, Jiasheng Jiang wrote:
> Add check for the return value of alloc_workqueue since it may return
> NULL pointer.
> 
> Fixes: e3ec7017f6a2 ("rtw89: add Realtek 802.11ax driver")
> Signed-off-by: Jiasheng Jiang <jiasheng@...as.ac.cn>
> ---
>  drivers/net/wireless/realtek/rtw89/core.c | 2 ++
>  1 file changed, 2 insertions(+)
> 
> diff --git a/drivers/net/wireless/realtek/rtw89/core.c b/drivers/net/wireless/realtek/rtw89/core.c
> index 931aff8b5dc9..006fe0499f81 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;

While the change is fixing one issue, you are adding another one.
There is no destroy of this workqueue if rtw89_load_firmware fails.

Thanks

>  	spin_lock_init(&rtwdev->ba_lock);
>  	spin_lock_init(&rtwdev->rpwm_lock);
>  	mutex_init(&rtwdev->mutex);
> -- 
> 2.25.1
>