netdev - Re: [PATCH v5] wifi: rsi: Fix handling of 802.3 EAPOL frames sent via control port

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Message-ID: <166789327017.4985.4306929119411941567.kvalo@kernel.org>
Date:   Tue,  8 Nov 2022 07:41:11 +0000 (UTC)
From:   Kalle Valo <kvalo@...nel.org>
To:     Marek Vasut <marex@...x.de>
Cc:     linux-wireless@...r.kernel.org, Marek Vasut <marex@...x.de>,
        Amitkumar Karwar <amit.karwar@...pinesignals.com>,
        Angus Ainslie <angus@...ea.ca>,
        Jakub Kicinski <kuba@...nel.org>,
        Johannes Berg <johannes@...solutions.net>,
        Martin Fuzzey <martin.fuzzey@...wbird.group>,
        Martin Kepplinger <martink@...teo.de>,
        Prameela Rani Garnepudi <prameela.j04cs@...il.com>,
        Sebastian Krzyszkowiak <sebastian.krzyszkowiak@...i.sm>,
        Siva Rebbagondla <siva8118@...il.com>, netdev@...r.kernel.org
Subject: Re: [PATCH v5] wifi: rsi: Fix handling of 802.3 EAPOL frames sent via
 control port

Marek Vasut <marex@...x.de> wrote:

> When using wpa_supplicant v2.10, this driver is no longer able to
> associate with any AP and fails in the EAPOL 4-way handshake while
> sending the 2/4 message to the AP. The problem is not present in
> wpa_supplicant v2.9 or older. The problem stems from HostAP commit
> 144314eaa ("wpa_supplicant: Send EAPOL frames over nl80211 where available")
> which changes the way EAPOL frames are sent, from them being send
> at L2 frames to them being sent via nl80211 control port.
> 
> An EAPOL frame sent as L2 frame is passed to the WiFi driver with
> skb->protocol ETH_P_PAE, while EAPOL frame sent via nl80211 control
> port has skb->protocol set to ETH_P_802_3 . The later happens in
> ieee80211_tx_control_port(), where the EAPOL frame is encapsulated
> into 802.3 frame.
> 
> The rsi_91x driver handles ETH_P_PAE EAPOL frames as high-priority
> frames and sends them via highest-priority transmit queue, while
> the ETH_P_802_3 frames are sent as regular frames. The EAPOL 4-way
> handshake frames must be sent as highest-priority, otherwise the
> 4-way handshake times out.
> 
> Therefore, to fix this problem, inspect the skb control flags and
> if flag IEEE80211_TX_CTRL_PORT_CTRL_PROTO is set, assume this is
> an EAPOL frame and transmit the frame via high-priority queue just
> like other ETH_P_PAE frames.
> 
> Fixes: 0eb42586cf87 ("rsi: data packet descriptor enhancements")
> Signed-off-by: Marek Vasut <marex@...x.de>

Patch applied to wireless-next.git, thanks.

b8f6efccbb9d wifi: rsi: Fix handling of 802.3 EAPOL frames sent via control port

-- 
https://patchwork.kernel.org/project/linux-wireless/patch/20221104163339.227432-1-marex@denx.de/

https://wireless.wiki.kernel.org/en/developers/documentation/submittingpatches