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static void uvc_buffer_queue(struct vb2_buffer *vb)
{
struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
struct uvc_video_queue *queue = vb2_get_drv_priv(vb->vb2_queue);
struct uvc_buffer *buf = container_of(vbuf, struct uvc_buffer, buf);
unsigned long flags;
spin_lock_irqsave(&queue->irqlock, flags);
if (likely(!(queue->flags & UVC_QUEUE_DISCONNECTED))) {
list_add_tail(&buf->queue, &queue->irqqueue);
} else {
/* If the device is disconnected return the buffer to userspace
* directly. The next QBUF call will fail with -ENODEV.
*/
buf->state = UVC_BUF_STATE_ERROR;
vb2_buffer_done(vb, VB2_BUF_STATE_ERROR);
}
spin_unlock_irqrestore(&queue->irqlock, flags);
}
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