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vhost: stop worker only if created 

Its currently illegal to call kthread_stop(NULL)

Reported-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Acked-by: Tejun Heo <tj@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Eric Dumazet 2010-08-31 02:05:57 +00:00 committed by David S. Miller
parent aa8a9e25c5
commit 78b620ce9e
1 changed files with 4 additions and 1 deletions
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5
drivers/vhost/vhost.c
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@ -323,7 +323,10 @@ void vhost_dev_cleanup(struct vhost_dev *dev)
dev->mm = NULL;
WARN_ON(!list_empty(&dev->work_list));
kthread_stop(dev->worker);
if (dev->worker) {
kthread_stop(dev->worker);
dev->worker = NULL;
}
}
static int log_access_ok(void __user *log_base, u64 addr, unsigned long sz)