wifi: rtw88: delete timer and free skb queue when unloading

Fix possible crash and memory leak on driver unload by deleting
TX purge timer and freeing C2H queue in 'rtw_core_deinit()',
shrink critical section in the latter by freeing COEX queue
out of TX report lock scope.

Reviewed-by: Ping-Ke Shih <pkshih@realtek.com>
Signed-off-by: Dmitry Antipov <dmantipov@yandex.ru>
Signed-off-by: Kalle Valo <kvalo@kernel.org>
Link: https://lore.kernel.org/r/20230628072327.167196-1-dmantipov@yandex.ru

diff --git a/drivers/net/wireless/realtek/rtw88/main.c b/drivers/net/wireless/realtek/rtw88/main.c
index c853e2f..c2ddb4d 100644 (file)
--- a/drivers/net/wireless/realtek/rtw88/main.c
+++ b/drivers/net/wireless/realtek/rtw88/main.c
@@ -2183,10 +2183,12 @@ void rtw_core_deinit(struct rtw_dev *rtwdev)
                release_firmware(wow_fw->firmware);
 
        destroy_workqueue(rtwdev->tx_wq);
+       timer_delete_sync(&rtwdev->tx_report.purge_timer);
        spin_lock_irqsave(&rtwdev->tx_report.q_lock, flags);
        skb_queue_purge(&rtwdev->tx_report.queue);
-       skb_queue_purge(&rtwdev->coex.queue);
        spin_unlock_irqrestore(&rtwdev->tx_report.q_lock, flags);
+       skb_queue_purge(&rtwdev->coex.queue);
+       skb_queue_purge(&rtwdev->c2h_queue);
 
        list_for_each_entry_safe(rsvd_pkt, tmp, &rtwdev->rsvd_page_list,
                                 build_list) {