Date: Fri, 18 May 2012 18:40:19 +0200 From: Clemens Ladisch Subject: 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 Signed-off-by: Stefan Richter --- drivers/firewire/sbp2.c | 13 ++++--------- 1 file changed, 4 insertions(+), 9 deletions(-) --- a/drivers/firewire/sbp2.c +++ b/drivers/firewire/sbp2.c @@ -1296,10 +1296,7 @@ static struct fw_driver sbp2_driver = { 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 @@ static int sbp2_map_scatterlist(struct s 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 @@ static int sbp2_map_scatterlist(struct s 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; }