linux-kernel - Re: MODULE_DEVICE_TABLE(isapnp, ...) does nothing

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Date:	Wed, 25 Nov 2009 14:21:33 +0100
From:	Ondrej Zary <linux@...nbow-software.org>
To:	Kay Sievers <kay.sievers@...y.org>
Cc:	Takashi Iwai <tiwai@...e.de>,
	Rusty Russell <rusty@...tcorp.com.au>,
	linux-kernel@...r.kernel.org,
	Jon Masters <jonathan@...masters.org>,
	Jaroslav Kysela <perex@...ex.cz>, Greg KH <gregkh@...e.de>
Subject: Re: MODULE_DEVICE_TABLE(isapnp, ...) does nothing

On Wednesday 25 November 2009, Kay Sievers wrote:
> On Tue, Nov 24, 2009 at 22:23, Ondrej Zary <linux@...nbow-software.org> 
wrote:
> > On Tuesday 24 November 2009 09:57:28 Kay Sievers wrote:
> >> Oh, your box has acpi mapped pnp aliases for this device? You can see
> >> your ID string somewhere in this list?
> >>   grep . /sys/bus/acpi/devices/*/modalias
> >>
> >> If not, is it in the pnp bus list?
> >>   grep . /sys/bus/pnp/devices/*/id
> >
> > It's listen in the pnp bus only:
> >
> > $ grep -i 80d6 /sys/bus/acpi/devices/*/modalias
> > $ grep -i 80d6 /sys/bus/pnp/devices/*/id
> > /sys/bus/pnp/devices/01:01.00/id:PNP80d6
> > $ cat /sys/bus/pnp/devices/01\:01.00/id
> > RTL8019
> > PNP80d6
> >
> > So the acpi alias was useless (I just copied another entry). This alone
> > works: alias pnp:dPNP80d6* ne
>
> I see. Plain upstream udev would not load anything here, as the pnp
> bus has no modalias support because of the non-working aliases. We
> rely on acpi mapping all the pnp entries. Your system probably runs
> the shell script which iterates over the "id" file and calls modprobe
> for all it finds in there.

It's Debian Squeeze.

-- 
Ondrej Zary
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