tpm: ibmvtpm: retry on H_CLOSED in tpm_ibmvtpm_send()
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. Cc: stable@vger.kernel.org # 3.7.x Fixes: 132f7629 ("drivers/char/tpm: Add new device driver to support IBM vTPM") 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> Tested-by: Linh Pham <phaml@us.ibm.com> Reviewed-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com> Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
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