Re: [PATCH] Repair soft lockup with monitor mode of ath9k_htc card

Kalle Valo
2015-01-30T10:45:08Z

yuweizheng@139.com writes:

> From: Yuwei Zheng <yuweizheng@139.com>
>
> In the environment with heavy wifi traffic, set the ar9271 into
> monitor mode, will trigger a deadloop panic.
>
> The ath9k_hif_usb_rx_cb function excute on the interrupt context, and ath9k_rx_tasklet excute
> on the soft irq context. In other words, the ath9k_hif_usb_rx_cb have more chance to excute than
> ath9k_rx_tasklet. So in the worst condition, the rx.rxbuf receive list is always full,
> and the do {}while(true) loop will not be break. The kernel get a soft lockup panic.

Word wrapping is too long and please prefix the title with "ath9k_htc: ".

--
Kalle Valo