linux-kernel - [PATCH 0/2 v3] tpm: fix locality and power saving handling

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Message-Id: <20180214134319.4400-1-tomas.winkler@intel.com>
Date:   Wed, 14 Feb 2018 15:43:17 +0200
From:   Tomas Winkler <tomas.winkler@...el.com>
To:     Jarkko Sakkinen <jarkko.sakkinen@...ux.intel.com>,
        Jason Gunthorpe <jgg@...pe.ca>
Cc:     Alexander Usyskin <alexander.usyskin@...el.com>,
        linux-integrity@...r.kernel.org,
        linux-security-module@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        Tomas Winkler <tomas.winkler@...el.com>
Subject: [PATCH 0/2 v3] tpm: fix locality and power saving handling

Devices that support locality has failed to transmit due to
reserved order of locality request and cmdReady/goIdle handshake.
The cmdReady/goIdle should be performed on the requested locality.

The first patch corrects the locality and power-save order,
adds required polling for completion of goIdle and locality relinquish.

The second patch removes cmdRead/goIdle handshake from runtime_pm as it's
rather a part of TPM2 protocol  then true device power management,
and on device it's no longer optional.

Tomas Winkler (2):
  tpm: cmd_ready command can be issued only after granting locality
  tpm: separate cmd_ready/go_idle from runtime_pm

 drivers/char/tpm/tpm-interface.c |  28 +++++--
 drivers/char/tpm/tpm_crb.c       | 157 +++++++++++++++++++++++----------------
 drivers/char/tpm/tpm_tis_core.c  |   4 +-
 include/linux/tpm.h              |   4 +-
 4 files changed, 122 insertions(+), 71 deletions(-)

-- 
2.14.3