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Date: Thu, 19 Mar 2020 21:50:11 +0200 From: Jarkko Sakkinen <jarkko.sakkinen@...ux.intel.com> To: George Wilson <gcwilson@...ux.ibm.com> Cc: linux-integrity@...r.kernel.org, Alexey Kardashevskiy <aik@...abs.ru>, Stefan Berger <stefanb@...ux.ibm.com>, Nayna Jain <nayna@...ux.vnet.ibm.com>, Jason Gunthorpe <jgg@...pe.ca>, linux-kernel@...r.kernel.org, Linh Pham <phaml@...ibm.com> Subject: Re: [PATCH v3] tpm: ibmvtpm: retry on H_CLOSED in tpm_ibmvtpm_send() On Wed, Mar 18, 2020 at 07:49:27PM -0400, George Wilson wrote: > tpm_ibmvtpm_send() can fail during PowerVM Live Partition Mobility 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@...ibm.com> > Reviewed-by: Stefan Berger <stefanb@...ux.ibm.com> > Signed-off-by: George Wilson <gcwilson@...ux.ibm.com> > Tested-by: Linh Pham <phaml@...ibm.com> > Fixes: 132f76294744 ("Add new device driver to support IBM vTPM") Reviewed-by: Jarkko Sakkinen <jarkko.sakkinen@...ux.intel.com> Thank you. /Jarkko
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