Re: [PATCH v3 07/11] rtw88: Add common USB chip support

Sascha Hauer [off-list ref] writes:

quoted

quoted

+static void rtw_usb_write_port_tx_complete(struct urb *urb)
+{
+	struct rtw_usb_txcb *txcb = urb->context;
+	struct rtw_dev *rtwdev = txcb->rtwdev;
+	struct ieee80211_hw *hw = rtwdev->hw;
+
+	while (true) {

Is it possible to have a hard limit to prevent unexpected infinite loop?

Yes, that would be possible, but do you think it's necessary?

It's a common advice to have a limit for loops in kernel.

Each *txcb is used only once, It's allocated in rtw_usb_tx_agg_skb() and
&txcb->tx_ack_queue is filled with a limited number of skbs there. These
skbs is then iterated over in rtw_usb_write_port_tx_complete(), so I don't
see a way how we could end up in an infinite loop here.

Everyone always say that their code is bugfree ;) More seriously though,
even if it would be bugfree now someone else can add buggy code later.
So much better to have a limit for the loop.

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