linux-kernel - Re: [PATCH v2 3/4] tpm: Implement tpm2_init to call when TPM_OPS_AUTO

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Message-ID: <20200226150255.GB3407@linux.intel.com>
Date:   Wed, 26 Feb 2020 17:02:55 +0200
From:   Jarkko Sakkinen <jarkko.sakkinen@...ux.intel.com>
To:     Stefan Berger <stefanb@...ux.ibm.com>
Cc:     Stefan Berger <stefanb@...ux.vnet.ibm.com>,
        linux-integrity@...r.kernel.org, aik@...abs.ru,
        david@...son.dropbear.id.au, linux-kernel@...r.kernel.org,
        nayna@...ux.vnet.ibm.com, gcwilson@...ux.ibm.com, jgg@...pe.ca
Subject: Re: [PATCH v2 3/4] tpm: Implement tpm2_init to call when
 TPM_OPS_AUTO_STARTUP is not set

On Tue, Feb 25, 2020 at 01:20:39PM -0500, Stefan Berger wrote:
> On 2/25/20 12:00 PM, Jarkko Sakkinen wrote:
> > On Thu, Feb 13, 2020 at 03:23:28PM -0500, Stefan Berger wrote:
> > > From: Stefan Berger <stefanb@...ux.ibm.com>
> > > 
> > > Implement tpm2_init() that gets the TPM 2 timeouts and command durations
> > > and command code attributes. This function is to be called in case the
> > > TPM_OPS_AUTO_STARTUP flag is not set and therefore tpm2_auto_startup()
> > > is not called.
> > > 
> > > Signed-off-by: Stefan Berger <stefanb@...ux.ibm.com>
> > The commit makes zero effort trying to explain what the heck tpm_init()
> > is and when it should be used and why the function name tpm2_init().
> 
> Are you saying the explanation of when to use tpm2_init above is not enough?
> 'bviously we are trying to cover the case of using the TPM 2 by a driver
> that doesn't use the TPM_OPS_AUTO_STARTUP flag and therefore the TPM 2
> timeouts and command durations and command code attributes are not set as
> they would be if tpm2_auto_startup() was to be called and tpm2_init() is the
> alternative to call. I didn't like tpm2_init() either... any suggestions for
> a better name?

I'm not getting what this commit is trying to do in the first place.

/Jarkko