Commit 169c246a authored by Rusty Russell's avatar Rusty Russell

virtio: fix balloon without VIRTIO_BALLOON_F_STATS_VQ

When running under qemu-kvm-0.11.0:

	BUG: unable to handle kernel paging request at 56e58955
	...
	Process vballoon (pid: 1297, ti=c7976000 task=c70a6ca0 task.ti=c7
	...
	Call Trace:
	 [<c88253a3>] ? balloon+0x1b3/0x440 [virtio_balloon]
	 [<c041c2d7>] ? schedule+0x327/0x9d0
	 [<c88251f0>] ? balloon+0x0/0x440 [virtio_balloon]
	 [<c014a2d4>] ? kthread+0x74/0x80
	 [<c014a260>] ? kthread+0x0/0x80
	 [<c0103b36>] ? kernel_thread_helper+0x6/0x30

need_stats_update should be zero-initialized.
Signed-off-by: default avatarRusty Russell <rusty@rustcorp.com.au>
Acked-by: default avatarAdam Litke <agl@us.ibm.com>
parent 1f34c71a
...@@ -292,6 +292,7 @@ static int virtballoon_probe(struct virtio_device *vdev) ...@@ -292,6 +292,7 @@ static int virtballoon_probe(struct virtio_device *vdev)
vb->num_pages = 0; vb->num_pages = 0;
init_waitqueue_head(&vb->config_change); init_waitqueue_head(&vb->config_change);
vb->vdev = vdev; vb->vdev = vdev;
vb->need_stats_update = 0;
/* We expect two virtqueues: inflate and deflate, /* We expect two virtqueues: inflate and deflate,
* and optionally stat. */ * and optionally stat. */
......
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