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-rw-r--r--drivers/vhost/vhost.c18
1 files changed, 11 insertions, 7 deletions
diff --git a/drivers/vhost/vhost.c b/drivers/vhost/vhost.c
index 38244f59cdd9..ade0568c07a4 100644
--- a/drivers/vhost/vhost.c
+++ b/drivers/vhost/vhost.c
@@ -97,22 +97,26 @@ void vhost_poll_stop(struct vhost_poll *poll)
97 remove_wait_queue(poll->wqh, &poll->wait); 97 remove_wait_queue(poll->wqh, &poll->wait);
98} 98}
99 99
100static bool vhost_work_seq_done(struct vhost_dev *dev, struct vhost_work *work,
101 unsigned seq)
102{
103 int left;
104 spin_lock_irq(&dev->work_lock);
105 left = seq - work->done_seq;
106 spin_unlock_irq(&dev->work_lock);
107 return left <= 0;
108}
109
100static void vhost_work_flush(struct vhost_dev *dev, struct vhost_work *work) 110static void vhost_work_flush(struct vhost_dev *dev, struct vhost_work *work)
101{ 111{
102 unsigned seq; 112 unsigned seq;
103 int left;
104 int flushing; 113 int flushing;
105 114
106 spin_lock_irq(&dev->work_lock); 115 spin_lock_irq(&dev->work_lock);
107 seq = work->queue_seq; 116 seq = work->queue_seq;
108 work->flushing++; 117 work->flushing++;
109 spin_unlock_irq(&dev->work_lock); 118 spin_unlock_irq(&dev->work_lock);
110 wait_event(work->done, ({ 119 wait_event(work->done, vhost_work_seq_done(dev, work, seq));
111 spin_lock_irq(&dev->work_lock);
112 left = seq - work->done_seq <= 0;
113 spin_unlock_irq(&dev->work_lock);
114 left;
115 }));
116 spin_lock_irq(&dev->work_lock); 120 spin_lock_irq(&dev->work_lock);
117 flushing = --work->flushing; 121 flushing = --work->flushing;
118 spin_unlock_irq(&dev->work_lock); 122 spin_unlock_irq(&dev->work_lock);