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Subject: Re: [PATCH v2 1/4] tpm: Implement tpm_chip_find() and tpm_chip_put()
 for other subsystems
To:     Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
Cc:     linux-integrity@vger.kernel.org, zohar@linux.vnet.ibm.com,
        jgg@ziepe.ca, linux-kernel@vger.kernel.org
References: <20180620204236.1572523-1-stefanb@linux.vnet.ibm.com>
 <20180620204236.1572523-2-stefanb@linux.vnet.ibm.com>
 <20180621171518.GI11859@linux.intel.com>
From:   Stefan Berger <stefanb@linux.vnet.ibm.com>
Date:   Thu, 21 Jun 2018 13:27:33 -0400
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On 06/21/2018 01:15 PM, Jarkko Sakkinen wrote:
> On Wed, Jun 20, 2018 at 04:42:33PM -0400, Stefan Berger wrote:
>> Implement tpm_chip_find() for other subsystems to find a TPM chip and
>> get a reference to that chip. Once done with using the chip, the reference
>> is released using tpm_chip_put().
>>
>> Signed-off-by: Stefan Berger <stefanb@linux.vnet.ibm.com>
> You should sort this out in a way that we don't end up with duplicate
> functions.

We cannot hold the ops_sem semaphore for a long time. So we need a 
function that gets us a reference and doesn't hold the ops semaphore and 
that's where this tpm_chip_find() comes from.

    Stefan

> /Jarkko
>