linux-kernel - Re: [PATCH 2/2 v2] tpm: separate cmd_ready/go_idle from runtime

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Message-ID: <20180206200441.c2fnehekqbk3jcsg@linux.intel.com>
Date:   Tue, 6 Feb 2018 22:04:41 +0200
From:   Jarkko Sakkinen <jarkko.sakkinen@...ux.intel.com>
To:     Tomas Winkler <tomas.winkler@...el.com>
Cc:     Jason Gunthorpe <jgg@...pe.ca>,
        Alexander Usyskin <alexander.usyskin@...el.com>,
        linux-integrity@...r.kernel.org,
        linux-security-module@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 2/2 v2] tpm: separate cmd_ready/go_idle from runtime_pm

On Sun, Jan 28, 2018 at 09:51:01AM +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>

Makes sense so that only 1/2 woud need to be backported to stable
(1/2 should probably have cc for stable).

/Jarkko