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| author | Kai-Heng Feng <[email protected]> | 2020-06-03 07:48:19 +0000 |
|---|---|---|
| committer | Jens Axboe <[email protected]> | 2020-06-18 15:21:40 +0000 |
| commit | b5292111de9bb70cba3489075970889765302136 (patch) | |
| tree | 086231488b2186326546bdc7a7c7c18e9175250c /tools/perf/scripts/python/check-perf-trace.py | |
| parent | ata/libata: Fix usage of page address by page_address in ata_scsi_mode_select... (diff) | |
| download | kernel-b5292111de9bb70cba3489075970889765302136.tar.gz kernel-b5292111de9bb70cba3489075970889765302136.zip | |
libata: Use per port sync for detach
Commit 130f4caf145c ("libata: Ensure ata_port probe has completed before
detach") may cause system freeze during suspend.
Using async_synchronize_full() in PM callbacks is wrong, since async
callbacks that are already scheduled may wait for not-yet-scheduled
callbacks, causes a circular dependency.
Instead of using big hammer like async_synchronize_full(), use async
cookie to make sure port probe are synced, without affecting other
scheduled PM callbacks.
Fixes: 130f4caf145c ("libata: Ensure ata_port probe has completed before detach")
Suggested-by: John Garry <[email protected]>
Signed-off-by: Kai-Heng Feng <[email protected]>
Tested-by: John Garry <[email protected]>
BugLink: https://bugs.launchpad.net/bugs/1867983
Signed-off-by: Jens Axboe <[email protected]>
Diffstat (limited to 'tools/perf/scripts/python/check-perf-trace.py')
0 files changed, 0 insertions, 0 deletions