ieee1394: sbp2: s/g list access cosmetics

Replace sg->length by sg_dma_len(sg).  Rename a variable for shorter
line lengths and eliminate some superfluous local variables.

Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>

1 files changed, 12 insertions, 14 deletions

diff --git a/drivers/ieee1394/sbp2.c b/drivers/ieee1394/sbp2.c
index 96eac0b53019..b91142b8482c 100644
--- a/drivers/ieee1394/sbp2.c
+++ b/drivers/ieee1394/sbp2.c
@@ -1451,7 +1451,7 @@ static void sbp2_prep_command_orb_sg(struct sbp2_command_orb *orb,
                                      struct sbp2_fwhost_info *hi,
                                      struct sbp2_command_info *cmd,
                                      unsigned int scsi_use_sg,
-                                     struct scatterlist *sgpnt,
+                                     struct scatterlist *sg,
                                      u32 orb_direction,
                                      enum dma_data_direction dma_dir)
 {
@@ -1461,12 +1461,12 @@ static void sbp2_prep_command_orb_sg(struct sbp2_command_orb *orb,
 
         /* special case if only one element (and less than 64KB in size) */
         if ((scsi_use_sg == 1) &&
-            (sgpnt[0].length <= SBP2_MAX_SG_ELEMENT_LENGTH)) {
+            (sg_dma_len(sg) <= SBP2_MAX_SG_ELEMENT_LENGTH)) {
 
-                cmd->dma_size = sgpnt[0].length;
+                cmd->dma_size = sg_dma_len(sg);
                 cmd->dma_type = CMD_DMA_PAGE;
                 cmd->cmd_dma = dma_map_page(hi->host->device.parent,
-                                            sg_page(&sgpnt[0]), sgpnt[0].offset,
+                                            sg_page(sg), sg->offset,
                                             cmd->dma_size, cmd->dma_dir);
 
                 orb->data_descriptor_lo = cmd->cmd_dma;
@@ -1477,11 +1477,11 @@ static void sbp2_prep_command_orb_sg(struct sbp2_command_orb *orb,
                                                 &cmd->scatter_gather_element[0];
                 u32 sg_count, sg_len;
                 dma_addr_t sg_addr;
-                int i, count = dma_map_sg(hi->host->device.parent, sgpnt,
+                int i, count = dma_map_sg(hi->host->device.parent, sg,
                                           scsi_use_sg, dma_dir);
 
                 cmd->dma_size = scsi_use_sg;
-                cmd->sge_buffer = sgpnt;
+                cmd->sge_buffer = sg;
 
                 /* use page tables (s/g) */
                 orb->misc |= ORB_SET_PAGE_TABLE_PRESENT(0x1);
@@ -1489,9 +1489,9 @@ static void sbp2_prep_command_orb_sg(struct sbp2_command_orb *orb,
 
                 /* loop through and fill out our SBP-2 page tables
                  * (and split up anything too large) */
-                for (i = 0, sg_count = 0; i < count; i++, sgpnt = sg_next(sgpnt)) {
-                        sg_len = sg_dma_len(sgpnt);
-                        sg_addr = sg_dma_address(sgpnt);
+                for (i = 0, sg_count = 0; i < count; i++, sg = sg_next(sg)) {
+                        sg_len = sg_dma_len(sg);
+                        sg_addr = sg_dma_address(sg);
                         while (sg_len) {
                                 sg_element[sg_count].segment_base_lo = sg_addr;
                                 if (sg_len > SBP2_MAX_SG_ELEMENT_LENGTH) {
@@ -1521,11 +1521,10 @@ static void sbp2_create_command_orb(struct sbp2_lu *lu,
                                     unchar *scsi_cmd,
                                     unsigned int scsi_use_sg,
                                     unsigned int scsi_request_bufflen,
-                                    void *scsi_request_buffer,
+                                    struct scatterlist *sg,
                                     enum dma_data_direction dma_dir)
 {
         struct sbp2_fwhost_info *hi = lu->hi;
-        struct scatterlist *sgpnt = (struct scatterlist *)scsi_request_buffer;
         struct sbp2_command_orb *orb = &cmd->command_orb;
         u32 orb_direction;
 
@@ -1560,7 +1559,7 @@ static void sbp2_create_command_orb(struct sbp2_lu *lu,
                 orb->data_descriptor_lo = 0x0;
                 orb->misc |= ORB_SET_DIRECTION(1);
         } else
-                sbp2_prep_command_orb_sg(orb, hi, cmd, scsi_use_sg, sgpnt,
+                sbp2_prep_command_orb_sg(orb, hi, cmd, scsi_use_sg, sg,
                                          orb_direction, dma_dir);
 
         sbp2util_cpu_to_be32_buffer(orb, sizeof(*orb));
@@ -1650,7 +1649,6 @@ static int sbp2_send_command(struct sbp2_lu *lu, struct scsi_cmnd *SCpnt,
                              void (*done)(struct scsi_cmnd *))
 {
         unchar *scsi_cmd = (unchar *)SCpnt->cmnd;
-        unsigned int request_bufflen = scsi_bufflen(SCpnt);
         struct sbp2_command_info *cmd;
 
         cmd = sbp2util_allocate_command_orb(lu, SCpnt, done);
@@ -1658,7 +1656,7 @@ static int sbp2_send_command(struct sbp2_lu *lu, struct scsi_cmnd *SCpnt,
                 return -EIO;
 
         sbp2_create_command_orb(lu, cmd, scsi_cmd, scsi_sg_count(SCpnt),
-                                request_bufflen, scsi_sglist(SCpnt),
+                                scsi_bufflen(SCpnt), scsi_sglist(SCpnt),
                                 SCpnt->sc_data_direction);
         sbp2_link_orb_command(lu, cmd);