linux-kernel - Re: [PATCH v2] wl1251: add sysfs interface for bluetooth coexistence mode configuration

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:	Thu, 21 Jan 2016 15:44:58 +0200
From:	Kalle Valo <kvalo@...eaurora.org>
To:	Pali Rohár <pali.rohar@...il.com>
Cc:	Pavel Machek <pavel@....cz>,
	Ivaylo Dimitrov <ivo.g.dimitrov.75@...il.com>,
	linux-wireless@...r.kernel.org, netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org, David Gnedt <david.gnedt@...izone.at>
Subject: Re: [PATCH v2] wl1251: add sysfs interface for bluetooth coexistence mode configuration

Pali Rohár <pali.rohar@...il.com> writes:

> Port the bt_coex_mode sysfs interface from wl1251 driver version included
> in the Maemo Fremantle kernel to allow bt-coexistence mode configuration.
> This enables userspace applications to set one of the modes
> WL1251_BT_COEX_OFF, WL1251_BT_COEX_ENABLE and WL1251_BT_COEX_MONOAUDIO.
> The default mode is WL1251_BT_COEX_OFF.
> It should be noted that this driver always enabled bt-coexistence before
> and enabled bt-coexistence directly affects the receiving performance,
> rendering it unusable in some low-signal situations. Especially monitor
> mode is affected very badly with bt-coexistence enabled.
>
> Signed-off-by: David Gnedt <david.gnedt@...izone.at>
> Signed-off-by: Pali Rohár <pali.rohar@...il.com>
> ---
> I'm resending this patch for review again as after two years there is no
> nl80211 interface for bt coex and wl1251 on Nokia N900 needs it. Once
> there will be common interface for bt coex I can rewrite my patches, but
> I do not want to wait another 2 years...

It doesn't work like that. Wireless drivers cannot have custom
interfaces via sysfs, all configuration has to go through cfg80211.
Instead of waiting two years you could have added it yourself.

-- 
Kalle Valo