linux-kernel - Re: [tpmdd-devel] [PATCH v2 0/3] tpm_tis: Clean up force module parameter

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Date:	Mon, 7 Dec 2015 10:59:15 +0100
From:	"Wilck, Martin" <martin.wilck@...fujitsu.com>
To:	Jason Gunthorpe <jgunthorpe@...idianresearch.com>
CC:	Jarkko Sakkinen <jarkko.sakkinen@...ux.intel.com>,
	"tpmdd-devel@...ts.sourceforge.net" 
	<tpmdd-devel@...ts.sourceforge.net>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Uwe Kleine-K??nig <u.kleine-koenig@...gutronix.de>
Subject: Re: [tpmdd-devel] [PATCH v2 0/3] tpm_tis: Clean up force module
 parameter

> IS_ERR should address the oops though??

No, see my answer to Jarkko in the other part of the thread.

> I've put all the revised patches here:
> 
> https://github.com/jgunthorpe/linux/commits/for-jarkko
> 
> If you are OK with them now I'll post the series.

I haven't re-reviewed it, but the test went alright. 

As reported before, with "force=1", I get the error message:

[ 1351.677808] tpm_tis MSFT0101:00: can't request region for resource
[mem 0xfed40000-0xfed44fff]
[ 1351.687431] tpm_tis: probe of MSFT0101:00 failed with error -16

This is kind of misleading because the TPM is actually working as a
platform device. But I can follow your previous argument that this is
acceptable because people who use "force=1" should know what they are
doing, so I don't regard this as critical.

Martin