Re: [PATCH v6 2/3] tpm: ibmvtpm: Wait for buffer to be set before proceeding

[Jarkko Sakkinen]

On Wed, 2020-03-04 at 08:22 -0500, Stefan Berger wrote:
> From: Stefan Berger <stefanb@xxxxxxxxxxxxx>
> 
> Synchronize with the results from the CRQs before continuing with
> the initialization. This avoids trying to send TPM commands while
> the rtce buffer has not been allocated, yet.
> 
> This patch fixes an existing race condition that may occurr if the
> hypervisor does not quickly respond to the VTPM_GET_RTCE_BUFFER_SIZE
> request sent during initialization and therefore the ibmvtpm->rtce_buf
> has not been allocated at the time the first TPM command is sent.
> 
> Fixes: 132f76294744 ("Add new device driver to support IBM vTPM")
> Signed-off-by: Stefan Berger <stefanb@xxxxxxxxxxxxx>

Reviewed-by: Jarkko Sakkinen <jarkko.sakkinen@xxxxxxxxxxxxxxx>

/Jarkko