[SCSI] i2o: convert to use the data buffer accessors

- remove the unnecessary map_single path.

- convert to use the new accessors for the sg lists and the
parameters.

Note: needs to change i2o_dma_map_sg when the chaining sg is ready.

Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Acked-by: "Salyzyn, Mark" <mark_salyzyn@adaptec.com>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>

1 files changed, 7 insertions, 17 deletions

diff --git a/drivers/message/i2o/i2o_scsi.c b/drivers/message/i2o/i2o_scsi.c
index 1045c8a518..aa6fb9429d 100644
--- a/drivers/message/i2o/i2o_scsi.c
+++ b/drivers/message/i2o/i2o_scsi.c
@@ -377,12 +377,8 @@ static int i2o_scsi_reply(struct i2o_controller *c, u32 m,
                 osm_err("SCSI error %08x\n", error);
 
         dev = &c->pdev->dev;
-        if (cmd->use_sg)
-                dma_unmap_sg(dev, cmd->request_buffer, cmd->use_sg,
-                             cmd->sc_data_direction);
-        else if (cmd->SCp.dma_handle)
-                dma_unmap_single(dev, cmd->SCp.dma_handle, cmd->request_bufflen,
-                                 cmd->sc_data_direction);
+
+        scsi_dma_unmap(cmd);
 
         cmd->scsi_done(cmd);
 
@@ -664,21 +660,15 @@ static int i2o_scsi_queuecommand(struct scsi_cmnd *SCpnt,
 
         if (sgl_offset != SGL_OFFSET_0) {
                 /* write size of data addressed by SGL */
-                *mptr++ = cpu_to_le32(SCpnt->request_bufflen);
+                *mptr++ = cpu_to_le32(scsi_bufflen(SCpnt));
 
                 /* Now fill in the SGList and command */
-                if (SCpnt->use_sg) {
-                        if (!i2o_dma_map_sg(c, SCpnt->request_buffer,
-                                            SCpnt->use_sg,
+
+                if (scsi_sg_count(SCpnt)) {
+                        if (!i2o_dma_map_sg(c, scsi_sglist(SCpnt),
+                                            scsi_sg_count(SCpnt),
                                             SCpnt->sc_data_direction, &mptr))
                                 goto nomem;
-                } else {
-                        SCpnt->SCp.dma_handle =
-                            i2o_dma_map_single(c, SCpnt->request_buffer,
-                                               SCpnt->request_bufflen,
-                                               SCpnt->sc_data_direction, &mptr);
-                        if (dma_mapping_error(SCpnt->SCp.dma_handle))
-                                goto nomem;
                 }
         }