linux-kernel - Re: char/tpm: tpm_infineon no longer loaded for HP 2510p laptop

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Date:	Thu, 21 Aug 2008 15:58:23 -0600
From:	Bjorn Helgaas <bjorn.helgaas@...com>
To:	Kay Sievers <kay.sievers@...y.org>
Cc:	ambx1@....rr.com, elendil@...net.nl, trenn@...e.de,
	akpm@...ux-foundation.org, linux-kernel@...r.kernel.org,
	tpm@...horst.net, rjw@...k.pl, greg@...ah.com
Subject: Re: char/tpm: tpm_infineon no longer loaded for HP 2510p laptop

On Thursday 21 August 2008 03:18:33 pm Kay Sievers wrote:
> Bjorn Helgaas wrote:
> >Is there a "complete idiot's guide to modules
> >and udev"?  There's precious little in Documentation/ other than a bunch
> >of sample rules for various subsystems.
> 
> I don't know of any specific documentation, but it's pretty easy:
> ...

Thanks for the tutorial.

> >Could I fix this by implementing pnp_device_uevent()?
> 
> Only if we change the format of the current pnp device aliases
> to something like:
>   pnp*:XYZ2324:*
>   pnp*:ABC1234:*
> 
> and create a "modalias" file at every pnp device, and add MODALIAS to
> the uevent. The modalias must contains all ID's which belong to that
> device in one single string, separated and terminated by a special
> character, something like:
>   pnp:ABC1234:XYZ2324:RST3445:

This all sounds like good stuff that I'd like PNP to have.  Is there
any reason I shouldn't implement pnp_device_uevent()?  Any backwards-
compatibility issues?

I think that sounds like a better solution than doing this PNP ID
mangling.

Bjorn
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