This is used for vstorage to replace broken image with
a stub. Race is possible here, so we have to disable IO
before calling for ->replace_delta.
Signed-off-by: Kirill Tkhai <ktk...@virtuozzo.com>
---
drivers/block/ploop/dev.c | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)
diff --git a/drivers/block/ploop/dev.c b/drivers/block/ploop/dev.c
index 5f68353875d2..25150fb0467b 100644
--- a/drivers/block/ploop/dev.c
+++ b/drivers/block/ploop/dev.c
@@ -3440,13 +3440,15 @@ static int ploop_replace_delta(struct ploop_device *
plo, unsigned long arg)
goto out_close;
}
+ ploop_quiesce(plo);
if (delta->ops->replace_delta) {
err = delta->ops->replace_delta(delta);
- if (err)
+ if (err) {
+ ploop_relax(plo);
goto out_kobj_del;
+ }
}
- ploop_quiesce(plo);
ploop_map_destroy(&plo->map);
list_replace_init(&old_delta->list, &delta->list);
clear_bit(PLOOP_S_ABORT, &plo->state);
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