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[v2,0/3] OCC: fsi and hwmon: Set sequence number in submit interface

Message ID 20210721190231.117185-1-eajames@linux.ibm.com
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Series OCC: fsi and hwmon: Set sequence number in submit interface | expand


Eddie James July 21, 2021, 7:02 p.m. UTC
Conflicting sequence numbers have resulted in users of the OCC interface
getting the wrong response. For example, both the hwmon driver and an
application might send a transfer near the same time with the same sequence
number, and then one or both will get an incorrect respnse, but cannot tell
because the sequence number looks correct.
Perform the sequence numbering in the submit interface to make sure each
transfer has a unique sequence number. This also requires that the submit
interface perform the checksum calculation for the command. Adjust the hwmon
driver accordingly too.

Changes since v1:
 - fix 0day warnings and errors.

Eddie James (3):
  fsi: occ: Force sequence numbering per OCC
  hwmon: (occ) Remove sequence numbering and checksum calculation
  fsi: occ: Add dynamic debug to dump command and response

 drivers/fsi/fsi-occ.c      | 99 +++++++++++++++++++++++++++++++-------
 drivers/hwmon/occ/common.c | 30 +++++-------
 drivers/hwmon/occ/common.h |  3 +-
 drivers/hwmon/occ/p8_i2c.c | 15 +++---
 drivers/hwmon/occ/p9_sbe.c |  4 +-
 5 files changed, 106 insertions(+), 45 deletions(-)