Re: [PATCH v2 1/4] tpm: Implement tpm_chip_find() and tpm_chip_put() for other subsystems

[Stefan Berger]

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@xxxxxxxxxxxxxxxxxx>
> 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.

ÂÂ Stefan

> /Jarkko