V4L/DVB (3516): Make video_buf more generic

Video_buf were concerned to allow PCI devices to be used as
video capture devices. This patch extends video_buf features
by virtualizing pci-dependent functions and allowing other
type of devices to use it.
It is still DMA centric, although it may be used also by
devices that emulates scatter/gather behavior or a DMA device

Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
diff --git a/drivers/media/common/saa7146_video.c b/drivers/media/common/saa7146_video.c
index 6b42713..e7079d1 100644
--- a/drivers/media/common/saa7146_video.c
+++ b/drivers/media/common/saa7146_video.c
@@ -1275,7 +1275,7 @@
 	    buf->vb.field  != field      ||
 	    buf->vb.field  != fh->video_fmt.field  ||
 	    buf->fmt       != &fh->video_fmt) {
-		saa7146_dma_free(dev,buf);
+		saa7146_dma_free(dev,q,buf);
 	}
 
 	if (STATE_NEEDS_INIT == buf->vb.state) {
@@ -1304,7 +1304,7 @@
 			saa7146_pgtable_alloc(dev->pci, &buf->pt[0]);
 		}
 
-		err = videobuf_iolock(dev->pci,&buf->vb, &vv->ov_fb);
+		err = videobuf_iolock(q,&buf->vb, &vv->ov_fb);
 		if (err)
 			goto oops;
 		err = saa7146_pgtable_build(dev,buf);
@@ -1318,7 +1318,7 @@
 
  oops:
 	DEB_D(("error out.\n"));
-	saa7146_dma_free(dev,buf);
+	saa7146_dma_free(dev,q,buf);
 
 	return err;
 }
@@ -1363,7 +1363,7 @@
 	struct saa7146_buf *buf = (struct saa7146_buf *)vb;
 
 	DEB_CAP(("vbuf:%p\n",vb));
-	saa7146_dma_free(dev,buf);
+	saa7146_dma_free(dev,q,buf);
 }
 
 static struct videobuf_queue_ops video_qops = {