+#ifdef DVB_MMAP
+ case DMX_REQBUFS:
+ if (mutex_lock_interruptible(&dmxdevfilter->mutex)) {
+ mutex_unlock(&dmxdev->mutex);
+ return -ERESTARTSYS;
+ }
+ ret = dvb_vb2_reqbufs(&dmxdevfilter->vb2_ctx, parg);
+ mutex_unlock(&dmxdevfilter->mutex);
+ break;
+
+ case DMX_QUERYBUF:
+ if (mutex_lock_interruptible(&dmxdevfilter->mutex)) {
+ mutex_unlock(&dmxdev->mutex);
+ return -ERESTARTSYS;
+ }
+ ret = dvb_vb2_querybuf(&dmxdevfilter->vb2_ctx, parg);
+ mutex_unlock(&dmxdevfilter->mutex);
+ break;
+
+ case DMX_EXPBUF:
+ if (mutex_lock_interruptible(&dmxdevfilter->mutex)) {
+ mutex_unlock(&dmxdev->mutex);
+ return -ERESTARTSYS;
+ }
+ ret = dvb_vb2_expbuf(&dmxdevfilter->vb2_ctx, parg);
+ mutex_unlock(&dmxdevfilter->mutex);
+ break;
+
+ case DMX_QBUF:
+ if (mutex_lock_interruptible(&dmxdevfilter->mutex)) {
+ mutex_unlock(&dmxdev->mutex);
+ return -ERESTARTSYS;
+ }
+ ret = dvb_vb2_qbuf(&dmxdevfilter->vb2_ctx, parg);
+ if (ret == 0 && !dvb_vb2_is_streaming(&dmxdevfilter->vb2_ctx))
+ ret = dvb_vb2_stream_on(&dmxdevfilter->vb2_ctx);
+ mutex_unlock(&dmxdevfilter->mutex);
+ break;
+
+ case DMX_DQBUF:
+ if (mutex_lock_interruptible(&dmxdevfilter->mutex)) {
+ mutex_unlock(&dmxdev->mutex);
+ return -ERESTARTSYS;
+ }
+ ret = dvb_vb2_dqbuf(&dmxdevfilter->vb2_ctx, parg);
+ mutex_unlock(&dmxdevfilter->mutex);
+ break;
+#endif