Re: [PATCH] tpm: ibmvtpm: retry on H_CLOSED in tpm_ibmvtpm_send()

[Jarkko Sakkinen]

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 âpartner partition
> suspendedâ 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@xxxxxxxxxx>
> Reviewed-by: Stefan Berger <stefanb@xxxxxxxxxxxxx>
> Signed-off-by: George Wilson <gcwilson@xxxxxxxxxxxxx>

What is LPM anyway?

/Jarkko