1 files changed, 21 insertions, 15 deletions

diff --git a/drivers/virtio/virtio_balloon.c b/drivers/virtio/virtio_balloon.c
index 2c9a92f1e525..9057cc768ca5 100644
--- a/drivers/virtio/virtio_balloon.c
+++ b/drivers/virtio/virtio_balloon.c
@@ -49,7 +49,8 @@ struct virtio_balloon {
 	struct virtqueue *inflate_vq, *deflate_vq, *stats_vq;
 
 	/* The balloon servicing is delegated to a freezable workqueue. */
-	struct work_struct work;
+	struct work_struct update_balloon_stats_work;
+	struct work_struct update_balloon_size_work;
 
 	/* Prevent updating balloon when it is being canceled. */
 	spinlock_t stop_update_lock;
@@ -76,7 +77,6 @@ struct virtio_balloon {
 	u32 pfns[VIRTIO_BALLOON_ARRAY_PFNS_MAX];
 
 	/* Memory statistics */
-	int need_stats_update;
 	struct virtio_balloon_stat stats[VIRTIO_BALLOON_S_NR];
 
 	/* To register callback in oom notifier call chain */
@@ -123,6 +123,7 @@ static void tell_host(struct virtio_balloon *vb, struct virtqueue *vq)
 
 	/* When host has read buffer, this completes via balloon_ack */
 	wait_event(vb->acked, virtqueue_get_buf(vq, &len));
+
 }
 
 static void set_page_pfns(u32 pfns[], struct page *page)
@@ -262,11 +263,9 @@ static void stats_request(struct virtqueue *vq)
 {
 	struct virtio_balloon *vb = vq->vdev->priv;
 
-	vb->need_stats_update = 1;
-
 	spin_lock(&vb->stop_update_lock);
 	if (!vb->stop_update)
-		queue_work(system_freezable_wq, &vb->work);
+		queue_work(system_freezable_wq, &vb->update_balloon_stats_work);
 	spin_unlock(&vb->stop_update_lock);
 }
 
@@ -276,7 +275,6 @@ static void stats_handle_request(struct virtio_balloon *vb)
 	struct scatterlist sg;
 	unsigned int len;
 
-	vb->need_stats_update = 0;
 	update_balloon_stats(vb);
 
 	vq = vb->stats_vq;
@@ -294,7 +292,7 @@ static void virtballoon_changed(struct virtio_device *vdev)
 
 	spin_lock_irqsave(&vb->stop_update_lock, flags);
 	if (!vb->stop_update)
-		queue_work(system_freezable_wq, &vb->work);
+		queue_work(system_freezable_wq, &vb->update_balloon_size_work);
 	spin_unlock_irqrestore(&vb->stop_update_lock, flags);
 }
 
@@ -358,17 +356,24 @@ static int virtballoon_oom_notify(struct notifier_block *self,
 	return NOTIFY_OK;
 }
 
-static void balloon(struct work_struct *work)
+static void update_balloon_stats_func(struct work_struct *work)
+{
+	struct virtio_balloon *vb;
+
+	vb = container_of(work, struct virtio_balloon,
+			  update_balloon_stats_work);
+	stats_handle_request(vb);
+}
+
+static void update_balloon_size_func(struct work_struct *work)
 {
 	struct virtio_balloon *vb;
 	s64 diff;
 
-	vb = container_of(work, struct virtio_balloon, work);
+	vb = container_of(work, struct virtio_balloon,
+			  update_balloon_size_work);
 	diff = towards_target(vb);
 
-	if (vb->need_stats_update)
-		stats_handle_request(vb);
-
 	if (diff > 0)
 		diff -= fill_balloon(vb, diff);
 	else if (diff < 0)
@@ -494,14 +499,14 @@ static int virtballoon_probe(struct virtio_device *vdev)
 		goto out;
 	}
 
-	INIT_WORK(&vb->work, balloon);
+	INIT_WORK(&vb->update_balloon_stats_work, update_balloon_stats_func);
+	INIT_WORK(&vb->update_balloon_size_work, update_balloon_size_func);
 	spin_lock_init(&vb->stop_update_lock);
 	vb->stop_update = false;
 	vb->num_pages = 0;
 	mutex_init(&vb->balloon_lock);
 	init_waitqueue_head(&vb->acked);
 	vb->vdev = vdev;
-	vb->need_stats_update = 0;
 
 	balloon_devinfo_init(&vb->vb_dev_info);
 #ifdef CONFIG_BALLOON_COMPACTION
@@ -552,7 +557,8 @@ static void virtballoon_remove(struct virtio_device *vdev)
 	spin_lock_irq(&vb->stop_update_lock);
 	vb->stop_update = true;
 	spin_unlock_irq(&vb->stop_update_lock);
-	cancel_work_sync(&vb->work);
+	cancel_work_sync(&vb->update_balloon_size_work);
+	cancel_work_sync(&vb->update_balloon_stats_work);
 
 	remove_common(vb);
 	kfree(vb);