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md: suspend i/o during runtime blk_integrity_unregister

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Synchronize pending i/o against a change in the integrity profile to
avoid the possibility of spurious integrity errors.  Given linear_add()
is suspending the mddev before manipulating the mddev, do the same for
the other personalities.

Acked-by: NeilBrown <neilb@suse.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Signed-off-by: Jens Axboe <axboe@fb.com>
This commit is contained in:
Dan Williams 2015-10-21 13:20:02 -04:00 • committed by Jens Axboe
parent 9609b9942b
commit c7bfced9a6
4 changed files with 7 additions and 0 deletions
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2
drivers/md/multipath.c
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@ -264,7 +264,9 @@ static int multipath_add_disk(struct mddev *mddev, struct md_rdev *rdev)
spin_unlock_irq(&conf->device_lock);
rcu_assign_pointer(p->rdev, rdev);
err = 0;
mddev_suspend(mddev);
md_integrity_add_rdev(rdev, mddev);
mddev_resume(mddev);
break;
}