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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.c24
1 files changed, 20 insertions, 4 deletions
diff --git a/drivers/md/dm-mpath.c b/drivers/md/dm-mpath.c
index 7eac080fcb18..d7107d23b897 100644
--- a/drivers/md/dm-mpath.c
+++ b/drivers/md/dm-mpath.c
@@ -507,13 +507,27 @@ static bool __must_push_back(struct multipath *m)
static bool must_push_back_rq(struct multipath *m)
{
- return (test_bit(MPATHF_QUEUE_IF_NO_PATH, &m->flags) ||
- __must_push_back(m));
+ bool r;
+ unsigned long flags;
+
+ spin_lock_irqsave(&m->lock, flags);
+ r = (test_bit(MPATHF_QUEUE_IF_NO_PATH, &m->flags) ||
+ __must_push_back(m));
+ spin_unlock_irqrestore(&m->lock, flags);
+
+ return r;
}
static bool must_push_back_bio(struct multipath *m)
{
- return __must_push_back(m);
+ bool r;
+ unsigned long flags;
+
+ spin_lock_irqsave(&m->lock, flags);
+ r = __must_push_back(m);
+ spin_unlock_irqrestore(&m->lock, flags);
+
+ return r;
}
/*
@@ -1680,12 +1694,14 @@ static void multipath_postsuspend(struct dm_target *ti)
static void multipath_resume(struct dm_target *ti)
{
struct multipath *m = ti->private;
+ unsigned long flags;
+ spin_lock_irqsave(&m->lock, flags);
if (test_bit(MPATHF_SAVED_QUEUE_IF_NO_PATH, &m->flags))
set_bit(MPATHF_QUEUE_IF_NO_PATH, &m->flags);
else
clear_bit(MPATHF_QUEUE_IF_NO_PATH, &m->flags);
- smp_mb__after_atomic();
+ spin_unlock_irqrestore(&m->lock, flags);
}
/*