On Wed, Dec 21, 2011 at 1:00 AM, Minchan Kim <minchan@xxxxxxxxxx> wrote:
> +static void virtblk_add_buf_wait(struct virtio_blk *vblk,
> + struct virtblk_req *vbr, unsigned long out, unsigned long in)
> +{
> + DEFINE_WAIT(wait);
> + bool retry, notify;
> +
> + for (;;) {
> + prepare_to_wait(&vblk->queue_wait, &wait,
> + TASK_UNINTERRUPTIBLE);
> +
> + spin_lock_irq(&vblk->lock);
> + if (virtqueue_add_buf(vblk->vq, vbr->sg,
> + out, in, vbr) < 0) {
> + retry = true;
> + } else {
> + retry = false;
> + }
> + notify = virtqueue_kick_prepare(vblk->vq);
> + spin_unlock_irq(&vblk->lock);
> +
> + if (notify)
virtblk_make_request() checks that the queue is not plugged. Do we
need to do that here too?
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