md: suspend i/o during runtime blk_integrity_unregister
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>
diff --git a/drivers/md/md.c b/drivers/md/md.c
index 7d07cac..714aa92 100644
--- a/drivers/md/md.c
+++ b/drivers/md/md.c
@@ -1994,6 +1994,7 @@
if (bi_rdev && blk_integrity_compare(mddev->gendisk,
rdev->bdev->bd_disk) >= 0)
return;
+ WARN_ON_ONCE(!mddev->suspended);
printk(KERN_NOTICE "disabling data integrity on %s\n", mdname(mddev));
blk_integrity_unregister(mddev->gendisk);
}