linux-kernel - Re: [PATCH v11 1/4] tpm: Remove all uses of drvdata from the TPM Core

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Date:	Mon, 25 Apr 2016 15:13:26 -0400
From:	Stefan Berger <stefanb@...ux.vnet.ibm.com>
To:	Jarkko Sakkinen <jarkko.sakkinen@...ux.intel.com>
Cc:	tpmdd-devel@...ts.sourceforge.net, jgunthorpe@...idianresearch.com,
	linux-security-module@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v11 1/4] tpm: Remove all uses of drvdata from the TPM Core

On 04/22/2016 11:06 AM, Jarkko Sakkinen wrote:
> On Mon, Apr 18, 2016 at 01:26:13PM -0400, Stefan Berger wrote:
>> From: Jason Gunthorpe <jgunthorpe@...idianresearch.com>
>>
>> The final thing preventing this was the way the sysfs files were
>> attached to the pdev. Follow the approach developed for ppi and move
>> the sysfs files to the chip->dev with symlinks from the pdev
>> for compatibility. Everything in the core now sanely uses container_of
>> to get the chip.
>>
>> Signed-off-by: Jason Gunthorpe <jgunthorpe@...idianresearch.com>
>> Signed-off-by: Stefan Berger <stefanb@...ux.vnet.ibm.com>
> Tested-by: Jarkko Sakkinen <jarkko.sakkinen@...ux.intel.com>
>
> Three configurations:
>
> * Haswell NUC with PTT (tpm_crb)
> * Another NUC with dTPM 2.0 chip
> * Dell E6420, which has TPM 1.2 chip
>
> Things seem to be unbroken.
>
> Stefan, have you verified that sysfs attributes work through routes:
>
> 1. From char device sysfs directory
> 2. Through link

Tested-by: Stefan Berger <stefanb@...ux.vnet.ibm.com>

>
> An also tried insmod/rmmod couple of rounds?

Works as-is in polling mode but requires Jason's patch "tpm: Fix IRQ 
unwind ordering in TIS" for interrupt mode to not throw errors on 'rmmod'.

Tested-by: Stefan Berger <stefanb@...ux.vnet.ibm.com>