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path: root/drivers/md/dm-mpath.c
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Diffstat (limited to 'drivers/md/dm-mpath.c')
-rw-r--r--drivers/md/dm-mpath.c22
1 files changed, 15 insertions, 7 deletions
diff --git a/drivers/md/dm-mpath.c b/drivers/md/dm-mpath.c
index e3283d35c7fd..de4da825ade6 100644
--- a/drivers/md/dm-mpath.c
+++ b/drivers/md/dm-mpath.c
@@ -1287,17 +1287,25 @@ static void multipath_wait_for_pg_init_completion(struct multipath *m)
static void flush_multipath_work(struct multipath *m)
{
if (m->hw_handler_name) {
- set_bit(MPATHF_PG_INIT_DISABLED, &m->flags);
- smp_mb__after_atomic();
+ unsigned long flags;
+
+ if (!atomic_read(&m->pg_init_in_progress))
+ goto skip;
+
+ spin_lock_irqsave(&m->lock, flags);
+ if (atomic_read(&m->pg_init_in_progress) &&
+ !test_and_set_bit(MPATHF_PG_INIT_DISABLED, &m->flags)) {
+ spin_unlock_irqrestore(&m->lock, flags);
- if (atomic_read(&m->pg_init_in_progress))
flush_workqueue(kmpath_handlerd);
- multipath_wait_for_pg_init_completion(m);
+ multipath_wait_for_pg_init_completion(m);
- clear_bit(MPATHF_PG_INIT_DISABLED, &m->flags);
- smp_mb__after_atomic();
+ spin_lock_irqsave(&m->lock, flags);
+ clear_bit(MPATHF_PG_INIT_DISABLED, &m->flags);
+ }
+ spin_unlock_irqrestore(&m->lock, flags);
}
-
+skip:
if (m->queue_mode == DM_TYPE_BIO_BASED)
flush_work(&m->process_queued_bios);
flush_work(&m->trigger_event);