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

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Message-ID: <87h9i7yrl1.fsf@kamboji.qca.qualcomm.com>
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