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]

Message-ID: <20160121135110.GH7192@pali>
Date:	Thu, 21 Jan 2016 14:51:10 +0100
From:	Pali Rohár <pali.rohar@...il.com>
To:	Kalle Valo <kvalo@...eaurora.org>
Cc:	Pavel Machek <pavel@....cz>, Arend van Spriel <arend@...adcom.com>,
	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

On Thursday 21 January 2016 15:48:14 Kalle Valo wrote:
> Pali Rohár <pali.rohar@...il.com> writes:
> 
> > On Thursday 14 January 2016 10:16:54 Pavel Machek wrote:
> >> On Wed 2016-01-13 23:32:47, Arend van Spriel wrote:
> >> > On 12/26/2015 12:45 PM, Pali Rohár wrote:
> >> > >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.
> >> > 
> >> > So what user-space process will be using this interface. Did you consider
> >> > adding debugfs interface? In case of monitor mode you could consider
> >> > disabling bt-coex from within the driver itself.
> >> 
> >> This aint no debugging feature.
> >
> > Right, bt-coex is not for debugging purpose, but for normal usage, when
> > user want to use together bluetooth and wifi or just one of those.
> 
> I think most of other drivers have a debugfs interface for btcoex, I
> guess mostly for testing purposes. But this really should be added to
> cfg80211.

All other TI wireless drivers have "bt_coex_state" sysfs node.

-- 
Pali Rohár
pali.rohar@...il.com