linux-kernel - Re: staging driver s626 clashes with philips SAA7146 media/dvb based cards

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Message-ID: <4A38E0D8.1000202@mev.co.uk>
Date:	Wed, 17 Jun 2009 13:26:00 +0100
From:	Ian Abbott <abbotti@....co.uk>
To:	Herton Ronaldo Krzesinski <herton@...driva.com.br>
CC:	Greg KH <gregkh@...e.de>, LKML <linux-kernel@...r.kernel.org>,
	Gianluca Palli <gpalli@...s.unibo.it>,
	David Schleef <ds@...leef.org>,
	Frank Mori Hess <fmhess@...rs.sourceforge.net>
Subject: Re: staging driver s626 clashes with philips SAA7146 media/dvb based
 cards

Herton Ronaldo Krzesinski wrote:
> Em Terça-feira 16 Junho 2009, às 17:51:21, Greg KH escreveu:
>> On Tue, Jun 16, 2009 at 05:01:44PM -0300, Herton Ronaldo Krzesinski wrote:
>>> Hi,
>>>
>>> The s626 (comedi) driver in staging conflicts with philips SAA7146
>>> media/dvb based cards, because it claims the same vendor:device pci id
>>> for all subdevice/subvendor ids. What happens is that for people that
>>> have a philips SAA7146 based card, s626 if available gets loaded by udev
>>> and makes system freeze (https://qa.mandriva.com/show_bug.cgi?id=51445).
>> So a PCI device that does different things has the same device ids?
>> ick, stupid vendors...
>>
>>> Looks like s626 shouldn't claim all 1131:7146 devices, either by
>>> specifying specific subdevice/subvendor ids specific to s626 devices or
>>> doing additional checks in its probe/attach function.
>> If you can propose the proper sub ids, or the needed checks, please send
>> a patch.
> 
> Can't propose proper sub ids here etc., as I don't know about/don't have s626 
> device, s626 author is CC'ed here to check this. But I could send a patch to 
> disable just the build of s626 if acceptable/desired for the moment.

The Windows driver (<http://www.sensoray.com/downloads/sdk626.zip>) has
this in the models section of the INF file:

%sx26.DeviceDesc%=sxdrv.Device,PCI\VEN_1131&DEV_7146&SUBSYS_02726000

And it looks like the correct device because this the strings section
contains:

sx26.DeviceDesc=   "Sensoray Model 626 Analog/Digital I/O"

Interpreting the above information gives us:

PCI Vendor ID = 0x1131
PCI Device ID = 0x7146
PCI Subvendor ID = 0x6000
PCI Subdevice ID = 0x0272 (626)

The Linux SDK for this board
(<http://www.sensoray.com/downloads/s626-1.0.1.tar.gz> has the same info
in the s626core.h file.

-- 
-=( Ian Abbott @ MEV Ltd.    E-mail: <abbotti@....co.uk>        )=-
-=( Tel: +44 (0)161 477 1898   FAX: +44 (0)161 718 3587         )=-
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