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authorKai-Heng Feng <kai.heng.feng@canonical.com>2020-06-03 15:48:19 +0800
committerJens Axboe <axboe@kernel.dk>2020-06-18 09:21:40 -0600
commitb5292111de9bb70cba3489075970889765302136 (patch)
tree086231488b2186326546bdc7a7c7c18e9175250c /include/linux/sched.h
parentata/libata: Fix usage of page address by page_address in ata_scsi_mode_select_xlat function (diff)
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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 <john.garry@huawei.com> Signed-off-by: Kai-Heng Feng <kai.heng.feng@canonical.com> Tested-by: John Garry <john.garry@huawei.com> BugLink: https://bugs.launchpad.net/bugs/1867983 Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'include/linux/sched.h')
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