From: Paolo Bonzini Date: Wed, 4 Jun 2014 11:34:56 +0000 (+0200) Subject: virtio-scsi: avoid cancelling uninitialized work items X-Git-Tag: firefly_0821_release~176^2~3657^2^2~1 X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=cdda0e5acbb78f7b777049f8c27899e5c5bb368f;p=firefly-linux-kernel-4.4.55.git virtio-scsi: avoid cancelling uninitialized work items 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 Cc: stable@vger.kernel.org Signed-off-by: Christoph Hellwig --- diff --git a/drivers/scsi/virtio_scsi.c b/drivers/scsi/virtio_scsi.c index 89ee5929eb6d..bcad917fd89a 100644 --- a/drivers/scsi/virtio_scsi.c +++ b/drivers/scsi/virtio_scsi.c @@ -253,6 +253,8 @@ 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) { @@ -260,6 +262,7 @@ 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); @@ -377,7 +380,6 @@ 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); }