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From: Denis Kenzior <denkenz@gmail.com>
To: Alexander Wetzel <alexander@wetzel-home.de>,
	Kalle Valo <kvalo@codeaurora.org>,
	Maya Erez <merez@codeaurora.org>
Cc: Ahmad Masri <amasri@codeaurora.org>,
	linux-wireless@vger.kernel.org, wil6210@qti.qualcomm.com
Subject: Re: [PATCH 04/11] wil6210: fix PTK re-key race
Date: Thu, 12 Sep 2019 12:39:37 -0500
Message-ID: <2c6bc637-62c2-020c-ab83-d2e1677d96b2@gmail.com> (raw)
In-Reply-To: <7b636313-fa4a-5ee4-935a-ba2ed5dde1e5@wetzel-home.de>

Hi Alexander,

> I don't know anything about the driver here but in mac80211 the idea to 
> avoid the race is to simply flush the queues prior deleting the outgoing 
> key.

Maybe a silly question, but what does flushing the queue mean in this 
context?  Is it waiting for all the packets to be sent or dropping them 
on the floor?

> 
> Now wpa_supplicant is not yet bypassing qdisks, but adding the socket 
> parameter PACKET_QDISC_BYPASS is basically a one-liner in wpa_supplicant 
> and should allow a generic way for drivers to avoid the race with a 
> simple queue flush...

Can you expand on this actually?  What would the sequence of events be?

Also, how would this be made to work with CONTROL_PORT over NL80211 ?

Regards,
-Denis

  reply index

Thread overview: 24+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-09-08  8:32 [PATCH 00/11] wil6210 patches Maya Erez
2019-09-08  8:32 ` [PATCH 01/11] wil6210: add wil_netif_rx() helper function Maya Erez
2019-09-12 15:08   ` Kalle Valo
2019-09-08  8:32 ` [PATCH 02/11] wil6210: add support for pci linkdown recovery Maya Erez
2019-09-12 15:22   ` Kalle Valo
2019-09-08  8:32 ` [PATCH 03/11] wil6210: add debugfs to show PMC ring content Maya Erez
2019-09-08  8:32 ` [PATCH 04/11] wil6210: fix PTK re-key race Maya Erez
2019-09-10 13:23   ` Kalle Valo
2019-09-11  7:50     ` Arend Van Spriel
2019-09-11 18:32     ` Alexander Wetzel
2019-09-12 17:39       ` Denis Kenzior [this message]
2019-09-12 21:04         ` Alexander Wetzel
2019-09-13  8:04           ` Arend Van Spriel
2019-09-13 14:33             ` Denis Kenzior
2019-09-13 20:48               ` Alexander Wetzel
2019-09-17 15:32                 ` Denis Kenzior
2019-09-13 18:43             ` Alexander Wetzel
2019-09-08  8:32 ` [PATCH 05/11] wil6210: make sure DR bit is read before rest of the status message Maya Erez
2019-09-08  8:32 ` [PATCH 06/11] wil6210: verify cid value is valid Maya Erez
2019-09-08  8:32 ` [PATCH 07/11] wil6210: properly initialize discovery_expired_work Maya Erez
2019-09-08  8:32 ` [PATCH 08/11] wil6210: report boottime_ns in scan results Maya Erez
2019-09-08  8:32 ` [PATCH 09/11] wil6210: use writel_relaxed in wil_debugfs_iomem_x32_set Maya Erez
2019-09-08  8:32 ` [PATCH 10/11] wil6210: fix RX short frame check Maya Erez
2019-09-08  8:32 ` [PATCH 11/11] wil6210: ignore reset errors for FW during probe Maya Erez

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