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Date:	Mon,  7 Jul 2014 16:57:48 -0700
From:	Greg Kroah-Hartman <>
Cc:	Greg Kroah-Hartman <>,, Paolo Bonzini <>,
	Stefan Hajnoczi <>,
	Christoph Hellwig <>
Subject: [PATCH 3.10 03/53] virtio-scsi: avoid cancelling uninitialized work items

3.10-stable review patch.  If anyone has any objections, please let me know.


From: Paolo Bonzini <>

commit cdda0e5acbb78f7b777049f8c27899e5c5bb368f upstream.

Calling the workqueue interface on uninitialized work items isn't a
good idea even if they're zeroed. It's not failing catastrophically only
through happy accidents.

Signed-off-by: Paolo Bonzini <>
Reviewed-by: Stefan Hajnoczi <>
Signed-off-by: Christoph Hellwig <>
Signed-off-by: Greg Kroah-Hartman <>

 drivers/scsi/virtio_scsi.c |    4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

--- a/drivers/scsi/virtio_scsi.c
+++ b/drivers/scsi/virtio_scsi.c
@@ -288,6 +288,8 @@ static void virtscsi_ctrl_done(struct vi
 	virtscsi_vq_done(vscsi, &vscsi->ctrl_vq, virtscsi_complete_free);
+static void virtscsi_handle_event(struct work_struct *work);
 static int virtscsi_kick_event(struct virtio_scsi *vscsi,
 			       struct virtio_scsi_event_node *event_node)
@@ -295,6 +297,7 @@ static int virtscsi_kick_event(struct vi
 	struct scatterlist sg;
 	unsigned long flags;
+	INIT_WORK(&event_node->work, virtscsi_handle_event);
 	sg_init_one(&sg, &event_node->event, sizeof(struct virtio_scsi_event));
 	spin_lock_irqsave(&vscsi->event_vq.vq_lock, flags);
@@ -412,7 +415,6 @@ static void virtscsi_complete_event(stru
 	struct virtio_scsi_event_node *event_node = buf;
-	INIT_WORK(&event_node->work, virtscsi_handle_event);

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