linux-kernel - Re: [PATCH v2] rtl8xxxu: add bluetooth co-existence support for single antenna

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:   Wed,  2 Oct 2019 04:21:32 +0000 (UTC)
From:   Kalle Valo <kvalo@...eaurora.org>
To:     Chris Chiu <chiu@...lessm.com>
Cc:     Jes.Sorensen@...il.com, davem@...emloft.net,
        linux-wireless@...r.kernel.org, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux@...lessm.com
Subject: Re: [PATCH v2] rtl8xxxu: add bluetooth co-existence support for
 single antenna

Chris Chiu <chiu@...lessm.com> wrote:

> The RTL8723BU suffers the wifi disconnection problem while bluetooth
> device connected. While wifi is doing tx/rx, the bluetooth will scan
> without results. This is due to the wifi and bluetooth share the same
> single antenna for RF communication and they need to have a mechanism
> to collaborate.
> 
> BT information is provided via the packet sent from co-processor to
> host (C2H). It contains the status of BT but the rtl8723bu_handle_c2h
> dose not really handle it. And there's no bluetooth coexistence
> mechanism to deal with it.
> 
> This commit adds a workqueue to set the tdma configurations and
> coefficient table per the parsed bluetooth link status and given
> wifi connection state. The tdma/coef table comes from the vendor
> driver code of the RTL8192EU and RTL8723BU. However, this commit is
> only for single antenna scenario which RTL8192EU is default dual
> antenna. The rtl8xxxu_parse_rxdesc24 which invokes the handle_c2h
> is only for 8723b and 8192e so the mechanism is expected to work
> on both chips with single antenna. Note RTL8192EU dual antenna is
> not supported.
> 
> Signed-off-by: Chris Chiu <chiu@...lessm.com>

As Jes was positive about this in v1 and had only cosmetic comments, I'm
planning to apply this. If there are any changes needed, those can be fixed in
a followup patch.

-- 
https://patchwork.kernel.org/patch/11140223/

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