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virtio-scsi: avoid cancelling uninitialized work items

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commit cdda0e5acb 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 <pbonzini@redhat.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Paolo Bonzini
2014-06-04 13:34:56 +02:00
committed by Greg Kroah-Hartman
parent c8e9b34fdc
commit 3bf6608abb
1 changed files with 3 additions and 1 deletions
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4
drivers/scsi/virtio_scsi.c
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@@ -288,6 +288,8 @@ static void virtscsi_ctrl_done(struct virtqueue *vq)
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 virtio_scsi *vscsi,
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(struct virtio_scsi *vscsi, void *buf)
{
struct virtio_scsi_event_node *event_node = buf;
INIT_WORK(&event_node->work, virtscsi_handle_event);
schedule_work(&event_node->work);
}