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| author | George Wilson <gcwilson@linux.ibm.com> | 2020-03-19 23:27:58 -0400 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-04-29 16:31:29 +0200 |
| commit | 9c4e0cab837e0b2a3748f376828db426019c6252 (patch) | |
| tree | 95cceec2fd88f63f67eacc5c43a3118afd56f626 /include/linux/path.h | |
| parent | ede1d58c156e2735f2b6971b0ea39d4629da10f9 (diff) | |
tpm: ibmvtpm: retry on H_CLOSED in tpm_ibmvtpm_send()
commit eba5cf3dcb844c82f54d4a857e124824e252206d upstream.
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: 132f76294744 ("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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'include/linux/path.h')
0 files changed, 0 insertions, 0 deletions