linux-kernel - Re: [PATCH v6 2/2] ath10k: Trigger sta disconnect on hardware restart

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Date:   Mon, 21 Mar 2022 10:46:44 +0000 (UTC)
From:   Kalle Valo <kvalo@...nel.org>
To:     Youghandhar Chintala <youghand@...eaurora.org>
Cc:     ath10k@...ts.infradead.org, linux-wireless@...r.kernel.org,
        linux-kernel@...r.kernel.org, pillair@...eaurora.org,
        dianders@...omium.org, kuabhs@...omium.org,
        briannorris@...omium.org, mpubbise@...eaurora.org,
        Youghandhar Chintala <youghand@...eaurora.org>
Subject: Re: [PATCH v6 2/2] ath10k: Trigger sta disconnect on hardware restart

Youghandhar Chintala <youghand@...eaurora.org> wrote:

> Currently after the hardware restart triggered from the driver,
> the station interface connection remains intact, since a disconnect
> trigger is not sent to userspace. This can lead to a problem in
> targets where the wifi mac sequence is added by the firmware.
> 
> After the target restart, its wifi mac sequence number gets
> reset to zero. Hence AP to which our device is connected will receive
> frames with a  wifi mac sequence number jump to the past, thereby
> resulting in the AP dropping all these frames, until the frame
> arrives with a wifi mac sequence number which AP was expecting.
> 
> To avoid such frame drops, its better to trigger a station disconnect
> upon target hardware restart which can be done with API
> ieee80211_reconfig_disconnect exposed to mac80211.
> 
> The other targets are not affected by this change, since the hardware
> params flag is not set.
> 
> Tested-on: WCN3990 hw1.0 SNOC WLAN.HL.3.1-01040-QCAHLSWMTPLZ-1
> Tested-on: QCA6174 hw3.2 PCI WLAN.RM.4.4.1-00110-QCARMSWP-1
> Tested-on: QCA6174 hw3.2 SDIO WLAN.RMH.4.4.1-00048
> 
> Signed-off-by: Youghandhar Chintala <youghand@...eaurora.org>
> Signed-off-by: Kalle Valo <quic_kvalo@...cinc.com>

Patch applied to ath-next branch of ath.git, thanks.

2c3fc50591ff ath10k: Trigger sta disconnect on hardware restart

-- 
https://patchwork.kernel.org/project/linux-wireless/patch/20220315082944.12406-3-youghand@codeaurora.org/

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