diff options
| author | Michael J. Ruhl <[email protected]> | 2017-10-23 06:05:45 -0700 |
|---|---|---|
| committer | Doug Ledford <[email protected]> | 2017-10-30 14:51:36 -0400 |
| commit | 4061f3a4da4574b8c9f11a82c767aaaed3ef2aa9 (patch) | |
| tree | 08394267eb7dc05cc03535d6bcdc8dfbe65720d8 /tools/perf/scripts/python/call-graph-from-sql.py | |
| parent | 5455e73a76a397d77541bb5b0eedac137ef525b5 (diff) | |
IB/hfi1: Race condition between user notification and driver state
The handler for link init state (HLS_UP_INIT) notifies userspace
(update_statusp()) before enabling the device
(RCV_CTRL_RCV_PORT_ENABLE_SMASK) or setting the device state
(ppd->host_link_state). This causes a race condition where the
userspace thinks the interface is in the INIT state before the driver
has set that state.
Rework the code path to eliminate the race.
Delay setting the init state until after a HW settling period.
Reviewed-by: Sebastian Sanchez <[email protected]>
Signed-off-by: Michael J. Ruhl <[email protected]>
Signed-off-by: Dennis Dalessandro <[email protected]>
Signed-off-by: Doug Ledford <[email protected]>
Diffstat (limited to 'tools/perf/scripts/python/call-graph-from-sql.py')
0 files changed, 0 insertions, 0 deletions