linux-kernel - Re: [RFC PATCH 1/1] tpm_tis: convert to using locality callbacks

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Message-ID: <20170327052801.pj6euzlg2bthrkin@intel.com>
Date:   Mon, 27 Mar 2017 08:28:01 +0300
From:   Jarkko Sakkinen <jarkko.sakkinen@...ux.intel.com>
To:     Jerry Snitselaar <jsnitsel@...hat.com>
Cc:     tpmdd-devel@...ts.sourceforge.net, linux-kernel@...r.kernel.org,
        Peter Huewe <peterhuewe@....de>,
        Jason Gunthorpe <jgunthorpe@...idianresearch.com>,
        Marcel Selhorst <tpmdd@...horst.net>
Subject: Re: [RFC PATCH 1/1] tpm_tis: convert to using locality callbacks

On Sat, Mar 25, 2017 at 01:05:21PM -0700, Jerry Snitselaar wrote:
> This patch converts tpm_tis to use of the new tpm class ops
> request_locality, and relinquish_locality.
> 
> With the move to using the callbacks, release_locality is changed so
> that we now release the locality even if there is no request pending.
> 
> This required some changes to the tpm_tis_core_init code path to
> make sure locality is requested when needed:
> 
>   - tpm2_probe code path will end up calling request/release through
>     callbacks, so request_locality prior to tpm2_probe not needed.
> 
>   - probe_itpm makes calls to tpm_tis_send_data which no longer calls
>     request_locality, so add request_locality prior to tpm_tis_send_data
>     calls. Also drop release_locality call in middleof probe_itpm, and
>     keep locality until release_locality called at end of probe_itpm.
> 
> Cc: Peter Huewe <peterhuewe@....de>
> Cc: Jarkko Sakkinen <jarkko.sakkinen@...ux.intel.com>
> Cc: Jason Gunthorpe <jgunthorpe@...idianresearch.com>
> Cc: Marcel Selhorst <tpmdd@...horst.net>
> Signed-off-by: Jerry Snitselaar <jsnitsel@...hat.com>
> ---
>  drivers/char/tpm/tpm_tis_core.c | 35 +++++++++--------------------------
>  1 file changed, 9 insertions(+), 26 deletions(-)

LGTM except what Jason said earlier.

/Jarkko