rtw88: pci: release tx skbs DMAed when stop

Interrupt is disabled to stop PCI, which means the skbs
queued for each TX ring will not be released via DMA
interrupt. To avoid those skbs remained being left in
the skb queue until PCI has been removed, driver needs
to release skbs by itself.
Signed-off-by: Yan-Hsuan Chuang <yhchuang@realtek.com>
Reviewed-by: Brian Norris <briannorris@chromium.org>
Tested-by: Brian Norris <briannorris@chromium.org>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>

drivers/net/wireless/realtek/rtw88/pci.c

@@ -500,6 +500,17 @@ static void rtw_pci_dma_reset(struct rtw_dev *rtwdev, struct rtw_pci *rtwpci)
 	rtwpci->rx_tag = 0;
 }
 
+static void rtw_pci_dma_release(struct rtw_dev *rtwdev, struct rtw_pci *rtwpci)
+{
+	struct rtw_pci_tx_ring *tx_ring;
+	u8 queue;
+
+	for (queue = 0; queue < RTK_MAX_TX_QUEUE_NUM; queue++) {
+		tx_ring = &rtwpci->tx_rings[queue];
+		rtw_pci_free_tx_ring_skbs(rtwdev, tx_ring);
+	}
+}
+
 static int rtw_pci_start(struct rtw_dev *rtwdev)
 {
 	struct rtw_pci *rtwpci = (struct rtw_pci *)rtwdev->priv;
@@ -521,6 +532,7 @@ static void rtw_pci_stop(struct rtw_dev *rtwdev)
 
 	spin_lock_irqsave(&rtwpci->irq_lock, flags);
 	rtw_pci_disable_interrupt(rtwdev, rtwpci);
+	rtw_pci_dma_release(rtwdev, rtwpci);
 	spin_unlock_irqrestore(&rtwpci->irq_lock, flags);
 }