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vhost: stop worker only if created
author
Eric Dumazet
<eric.dumazet@gmail.com>
Tue, 31 Aug 2010 02:05:57 +0000
(
02:05
+0000)
committer
David S. Miller
<davem@davemloft.net>
Wed, 1 Sep 2010 21:26:13 +0000
(14:26 -0700)
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>
drivers/vhost/vhost.c
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diff --git
a/drivers/vhost/vhost.c
b/drivers/vhost/vhost.c
index e05557d529992ec4deb1827a32574043bcd00925..4b99117f3ecd209c63571c610f813bd41d50abba 100644
(file)
--- a/
drivers/vhost/vhost.c
+++ b/
drivers/vhost/vhost.c
@@
-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)