firewire: sbp2: use scsi_dma_(un)map
Use the scsi_dma_map/scsi_dma_unmap helper to simplify the code
a little.
Signed-off-by: Clemens Ladisch <clemens@ladisch.de>
Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
diff --git a/drivers/firewire/sbp2.c b/drivers/firewire/sbp2.c
index 2e202d3..6ffaef3 100644
--- a/drivers/firewire/sbp2.c
+++ b/drivers/firewire/sbp2.c
@@ -1296,10 +1296,7 @@
static void sbp2_unmap_scatterlist(struct device *card_device,
struct sbp2_command_orb *orb)
{
- if (scsi_sg_count(orb->cmd))
- dma_unmap_sg(card_device, scsi_sglist(orb->cmd),
- scsi_sg_count(orb->cmd),
- orb->cmd->sc_data_direction);
+ scsi_dma_unmap(orb->cmd);
if (orb->request.misc & cpu_to_be32(COMMAND_ORB_PAGE_TABLE_PRESENT))
dma_unmap_single(card_device, orb->page_table_bus,
@@ -1405,9 +1402,8 @@
struct scatterlist *sg = scsi_sglist(orb->cmd);
int i, n;
- n = dma_map_sg(device->card->device, sg, scsi_sg_count(orb->cmd),
- orb->cmd->sc_data_direction);
- if (n == 0)
+ n = scsi_dma_map(orb->cmd);
+ if (n <= 0)
goto fail;
/*
@@ -1453,8 +1449,7 @@
return 0;
fail_page_table:
- dma_unmap_sg(device->card->device, scsi_sglist(orb->cmd),
- scsi_sg_count(orb->cmd), orb->cmd->sc_data_direction);
+ scsi_dma_unmap(orb->cmd);
fail:
return -ENOMEM;
}