linux-kernel - Re: [PATCH v2 2/4] tpm: ibmvtpm: Wait for buffer to be set before proceeding

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Message-ID: <20200225165744.GD15662@linux.intel.com>
Date:   Tue, 25 Feb 2020 18:57:44 +0200
From:   Jarkko Sakkinen <jarkko.sakkinen@...ux.intel.com>
To:     Stefan Berger <stefanb@...ux.vnet.ibm.com>
Cc:     linux-integrity@...r.kernel.org, aik@...abs.ru,
        david@...son.dropbear.id.au, linux-kernel@...r.kernel.org,
        nayna@...ux.vnet.ibm.com, gcwilson@...ux.ibm.com, jgg@...pe.ca,
        Stefan Berger <stefanb@...ux.ibm.com>
Subject: Re: [PATCH v2 2/4] tpm: ibmvtpm: Wait for buffer to be set before
 proceeding

On Thu, Feb 13, 2020 at 03:23:27PM -0500, Stefan Berger wrote:
> From: Stefan Berger <stefanb@...ux.ibm.com>
> 
> 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.

What is CRQ anyway an acronym of?

> 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.

If it fixes a race condition, why doesn't it have a fixes tag?

/Jarkko