From: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
To: George Wilson <gcwilson@linux.ibm.com>
Cc: linux-integrity@vger.kernel.org,
Alexey Kardashevskiy <aik@ozlabs.ru>,
Stefan Berger <stefanb@linux.ibm.com>,
Nayna Jain <nayna@linux.vnet.ibm.com>,
Jason Gunthorpe <jgg@ziepe.ca>,
linux-kernel@vger.kernel.org, Linh Pham <phaml@us.ibm.com>
Subject: Re: [PATCH] tpm: ibmvtpm: retry on H_CLOSED in tpm_ibmvtpm_send()
Date: Thu, 27 Feb 2020 18:23:39 +0200 [thread overview]
Message-ID: <20200227162339.GF5140@linux.intel.com> (raw)
In-Reply-To: <20200227155003.592321-1-gcwilson@linux.ibm.com>
On Thu, Feb 27, 2020 at 10:50:03AM -0500, George Wilson wrote:
> tpm_ibmvtpm_send() can fail during LPM resume with an H_CLOSED return
> from ibmvtpm_send_crq(). The PAPR says, 'The “partner partition
> suspended” transport event disables the associated CRQ such that any
> H_SEND_CRQ hcall() to the associated CRQ returns H_Closed until the CRQ
> has been explicitly enabled using the H_ENABLE_CRQ hcall.' This patch
> adds a check in tpm_ibmvtpm_send() for an H_CLOSED return from
> ibmvtpm_send_crq() and in that case calls tpm_ibmvtpm_resume() and
> retries the ibmvtpm_send_crq() once.
>
> Reported-by: Linh Pham <phaml@us.ibm.com>
> Reviewed-by: Stefan Berger <stefanb@linux.ibm.com>
> Signed-off-by: George Wilson <gcwilson@linux.ibm.com>
What is LPM anyway?
/Jarkko
next prev parent reply other threads:[~2020-02-27 16:23 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-02-27 15:50 [PATCH] tpm: ibmvtpm: retry on H_CLOSED in tpm_ibmvtpm_send() George Wilson
2020-02-27 16:23 ` Jarkko Sakkinen [this message]
2020-02-27 16:40 ` George Wilson
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