From: Kalle Valo <kvalo@codeaurora.org>
To: yuweizheng@139.com
Cc: linux-kernel@vger.kernel.org, ath9k-devel@venema.h4ckr.net,
linux-wireless@vger.kernel.org, ath9k-devel@qca.qualcomm.com,
linux@rempel-privat.de, netdev@vger.kernel.org,
Yuwei Zheng <zhengyuwei@360.cn>
Subject: Re: [PATCH] Repair soft lockup with monitor mode of ath9k_htc card
Date: Fri, 30 Jan 2015 12:44:52 +0200 [thread overview]
Message-ID: <87d25wzgwr.fsf@kamboji.qca.qualcomm.com> (raw)
In-Reply-To: <1422486872-16308-1-git-send-email-yuweizheng@139.com> (yuweizheng@139.com's message of "Thu, 29 Jan 2015 07:14:32 +0800")
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
next prev parent reply other threads:[~2015-01-30 10:45 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-01-28 23:14 [PATCH] Repair soft lockup with monitor mode of ath9k_htc card yuweizheng
2015-01-30 10:44 ` Kalle Valo [this message]
2015-01-30 10:55 ` Oleksij Rempel
2015-01-29 0:18 ` Yuwei Zheng
2015-01-29 4:09 zhengyuwei
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