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| author | Ricardo Ribalda Delgado <[email protected]> | 2017-10-10 16:11:15 +0000 |
|---|---|---|
| committer | Wolfram Sang <[email protected]> | 2017-10-13 19:05:56 +0000 |
| commit | 88fa2dfb075a20c3464e3d303c57dd8ced9e8309 (patch) | |
| tree | 21e4be535e1e55bb18b5d2f6b0195f6b917277a6 /tools/perf/scripts/python/failed-syscalls-by-pid.py | |
| parent | i2c: piix4: Fix SMBus port selection for AMD Family 17h chips (diff) | |
| download | kernel-88fa2dfb075a20c3464e3d303c57dd8ced9e8309.tar.gz kernel-88fa2dfb075a20c3464e3d303c57dd8ced9e8309.zip | |
i2c: piix4: Disable completely the IMC during SMBUS_BLOCK_DATA
SMBUS_BLOCK_DATA transactions might fail due to a race condition with
the IMC (Integrated Micro Controller), even when the IMC semaphore
is used.
This bug has been reported and confirmed by AMD, who suggested as a
solution an IMC firmware upgrade (obtained via BIOS update) and
disabling the IMC during SMBUS_BLOCK_DATA transactions.
Even without the IMC upgrade, the SMBUS is much more stable with this
patch.
Tested on a Bettong-alike board.
Signed-off-by: Ricardo Ribalda Delgado <[email protected]>
Reviewed-by: Jean Delvare <[email protected]>
Signed-off-by: Wolfram Sang <[email protected]>
Diffstat (limited to 'tools/perf/scripts/python/failed-syscalls-by-pid.py')
0 files changed, 0 insertions, 0 deletions