RE: [PATCH] wifi: rtw88: extend USB TX report timeout to RTL8822BU

[Ping-Ke Shih <pkshih@realtek.com>]

VolcomIlluminated <Volcomilluminated@airmail.cc> wrote:
> Luka Gejak's patch increased the TX report timeout for RTL8723DU to
> accommodate off-channel dwell time during background scans. The same
> issue affects RTL8822BU (tested on Edimax EW-7822ULC) where background
> scans cause the firmware to stay off-channel for periods exceeding the
> default 500ms timeout, causing the purge timer to fire prematurely and
> drop TX tracking skbs.
> 
> Extend the 2500ms timeout to also cover RTL8822BU USB devices.
> 
> Tested on RTL8822BU (Edimax EW-7822ULC) with 17,706 packets over 24+
> hours with zero drops.
> 
> Fixes: a82dfd33d123 ("wifi: rtw88: Add common USB chip support")
> Cc: stable@vger.kernel.org
> Signed-off-by: VolcomIlluminated <Volcomilluminated@airmail.cc>
> ---
> --- /tmp/linux-6.18/drivers/net/wireless/realtek/rtw88/tx.c     2025-11-30 17:42:10.000000000 -0500
> +++ /home/ptpx86mm1/kernelbuild/linux-6.18/drivers/net/wireless/realtek/rtw88/tx.c      2026-05-31

Just clone git repository and use 'git format-patch' to generate patch file
and send out.

> 16:00:37.125645594 -0400
> @@ -196,6 +196,7 @@
>  void rtw_tx_report_enqueue(struct rtw_dev *rtwdev, struct sk_buff *skb, u8 sn)
>  {
>         struct rtw_tx_report *tx_report = &rtwdev->tx_report;
> +       unsigned long timeout = RTW_TX_PROBE_TIMEOUT;
>         unsigned long flags;
>         u8 *drv_data;
> 
> @@ -207,7 +208,12 @@
>         __skb_queue_tail(&tx_report->queue, skb);
>         spin_unlock_irqrestore(&tx_report->q_lock, flags);
> 
> -       mod_timer(&tx_report->purge_timer, jiffies + RTW_TX_PROBE_TIMEOUT);
> +       if ((rtwdev->chip->id == RTW_CHIP_TYPE_8723D ||
> +            rtwdev->chip->id == RTW_CHIP_TYPE_8822B) &&

Please use https://github.com/pkshih/rtw.git rtw-next branch as your base. 

> +           rtwdev->hci.type == RTW_HCI_TYPE_USB)
> +               timeout = msecs_to_jiffies(2500);
> +
> +       mod_timer(&tx_report->purge_timer, jiffies + timeout);
>  }
>  EXPORT_SYMBOL(rtw_tx_report_enqueue);
>