- if (!SCpnt->use_sg) {
-
- /* If we get here with PCI_DMA_NONE, pci_map_single triggers a BUG() */
- if (!SCpnt->request_bufflen) pci_dir = PCI_DMA_BIDIRECTIONAL;
-
- if (SCpnt->request_buffer)
- cpp->data_address = H2DEV(pci_map_single(HD(j)->pdev,
- SCpnt->request_buffer, SCpnt->request_bufflen, pci_dir));
-
- cpp->data_len = H2DEV(SCpnt->request_bufflen);
- return;
- }
-
- sgpnt = (struct scatterlist *) SCpnt->request_buffer;
- count = pci_map_sg(HD(j)->pdev, sgpnt, SCpnt->use_sg, pci_dir);
-
- for (k = 0; k < count; k++) {
- cpp->sglist[k].address = H2DEV(sg_dma_address(&sgpnt[k]));
- cpp->sglist[k].num_bytes = H2DEV(sg_dma_len(&sgpnt[k]));
- data_len += sgpnt[k].length;
- }
-
- cpp->sg = TRUE;
- cpp->use_sg = SCpnt->use_sg;
- cpp->data_address = H2DEV(pci_map_single(HD(j)->pdev, cpp->sglist,
- SCpnt->use_sg * sizeof(struct sg_list), pci_dir));
- cpp->data_len = H2DEV(data_len);
+ if (scsi_bufflen(SCpnt)) {
+ count = scsi_dma_map(SCpnt);
+ BUG_ON(count < 0);
+
+ scsi_for_each_sg(SCpnt, sg, count, k) {
+ cpp->sglist[k].address = H2DEV(sg_dma_address(sg));
+ cpp->sglist[k].num_bytes = H2DEV(sg_dma_len(sg));
+ data_len += sg->length;
+ }
+
+ cpp->sg = TRUE;
+ cpp->use_sg = scsi_sg_count(SCpnt);
+ cpp->data_address =
+ H2DEV(pci_map_single(HD(j)->pdev, cpp->sglist,
+ cpp->use_sg * sizeof(struct sg_list),
+ pci_dir));
+ cpp->data_len = H2DEV(data_len);
+
+ } else {
+ pci_dir = PCI_DMA_BIDIRECTIONAL;
+ cpp->data_len = H2DEV(scsi_bufflen(SCpnt));
+ }