linux-kernel - Re: [PATCH 2/3] tpm: separate cmd_ready/go_idle from runtime

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Date:   Tue, 23 Jan 2018 08:33:22 -0700
From:   Jason Gunthorpe <jgg@...pe.ca>
To:     Jarkko Sakkinen <jarkko.sakkinen@...ux.intel.com>
Cc:     Tomas Winkler <tomas.winkler@...el.com>,
        Alexander Usyskin <alexander.usyskin@...el.com>,
        tpmdd-devel@...ts.sourceforge.net, linux-integrity@...r.kernel.org,
        linux-security-module@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 2/3] tpm: separate cmd_ready/go_idle from runtime_pm

On Tue, Jan 23, 2018 at 03:08:41PM +0200, Jarkko Sakkinen wrote:
> On Tue, Jan 23, 2018 at 01:27:30PM +0200, Tomas Winkler wrote:
> > We cannot use go_idle cmd_ready commands via runtime_pm handles
> > as with the introduction of localities this is no longer an optional
> > feature, while runtime pm can be not enabled.
> > Though cmd_ready/go_idle provides power saving feature, it's also part of
> > TPM2 protocol and should be called explicitly.
> > This patch exposes cmd_read/go_idle via tpm class ops and removes
> > runtime pm support as it is not used by any driver.
> > 
> > Signed-off-by: Tomas Winkler <tomas.winkler@...el.com>
> 
> Thank you.
> 
> LGTM
> 
> Jason, what do you think?

The PM stuff has been the source of confusion for a while, seems
reasonable to get rid of it.

Jason