[SCSI] Add spi_populate_*_msg functions

Introduce new helpers:
 - spi_populate_width_msg()
 - spi_populate_sync_msg()
 - spi_populate_ppr_msg()

and use them in drivers which already enable the SPI transport.

Signed-off-by: Matthew Wilcox <matthew@wil.cx>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>

1 files changed, 12 insertions, 41 deletions

diff --git a/drivers/scsi/sym53c8xx_2/sym_hipd.c b/drivers/scsi/sym53c8xx_2/sym_hipd.c
index f4854c33f48d..620b4726fbd9 100644
--- a/drivers/scsi/sym53c8xx_2/sym_hipd.c
+++ b/drivers/scsi/sym53c8xx_2/sym_hipd.c
@@ -40,7 +40,6 @@
 
 #include <linux/slab.h>
 #include <asm/param.h>          /* for timeouts in units of HZ */
-#include <scsi/scsi_dbg.h>
 
 #include "sym_glue.h"
 #include "sym_nvram.h"
@@ -1430,29 +1429,18 @@ static int sym_prepare_nego(struct sym_hcb *np, struct sym_ccb *cp, u_char *msgp
 
         switch (nego) {
         case NS_SYNC:
-                msgptr[msglen++] = M_EXTENDED;
-                msgptr[msglen++] = 3;
-                msgptr[msglen++] = M_X_SYNC_REQ;
-                msgptr[msglen++] = goal->period;
-                msgptr[msglen++] = goal->offset;
+                msglen += spi_populate_sync_msg(msgptr + msglen, goal->period,
+                                goal->offset);
                 break;
         case NS_WIDE:
-                msgptr[msglen++] = M_EXTENDED;
-                msgptr[msglen++] = 2;
-                msgptr[msglen++] = M_X_WIDE_REQ;
-                msgptr[msglen++] = goal->width;
+                msglen += spi_populate_width_msg(msgptr + msglen, goal->width);
                 break;
         case NS_PPR:
-                msgptr[msglen++] = M_EXTENDED;
-                msgptr[msglen++] = 6;
-                msgptr[msglen++] = M_X_PPR_REQ;
-                msgptr[msglen++] = goal->period;
-                msgptr[msglen++] = 0;
-                msgptr[msglen++] = goal->offset;
-                msgptr[msglen++] = goal->width;
-                msgptr[msglen++] = (goal->iu ? PPR_OPT_IU : 0) |
+                msglen += spi_populate_ppr_msg(msgptr + msglen, goal->period,
+                                goal->offset, goal->width,
+                                (goal->iu ? PPR_OPT_IU : 0) |
                                         (goal->dt ? PPR_OPT_DT : 0) |
-                                        (goal->qas ? PPR_OPT_QAS : 0);
+                                        (goal->qas ? PPR_OPT_QAS : 0));
                 break;
         }
 
@@ -3948,11 +3936,7 @@ sym_sync_nego_check(struct sym_hcb *np, int req, struct sym_ccb *cp)
         /*
          *  It was a request. Prepare an answer message.
          */
-        np->msgout[0] = M_EXTENDED;
-        np->msgout[1] = 3;
-        np->msgout[2] = M_X_SYNC_REQ;
-        np->msgout[3] = per;
-        np->msgout[4] = ofs;
+        spi_populate_sync_msg(np->msgout, per, ofs);
 
         if (DEBUG_FLAGS & DEBUG_NEGO) {
                 sym_print_nego_msg(np, target, "sync msgout", np->msgout);
@@ -4078,14 +4062,7 @@ sym_ppr_nego_check(struct sym_hcb *np, int req, int target)
         /*
          *  It was a request. Prepare an answer message.
          */
-        np->msgout[0] = M_EXTENDED;
-        np->msgout[1] = 6;
-        np->msgout[2] = M_X_PPR_REQ;
-        np->msgout[3] = per;
-        np->msgout[4] = 0;
-        np->msgout[5] = ofs;
-        np->msgout[6] = wide;
-        np->msgout[7] = opts;
+        spi_populate_ppr_msg(np->msgout, per, ofs, wide, opts);
 
         if (DEBUG_FLAGS & DEBUG_NEGO) {
                 sym_print_nego_msg(np, target, "ppr msgout", np->msgout);
@@ -4197,10 +4174,7 @@ sym_wide_nego_check(struct sym_hcb *np, int req, struct sym_ccb *cp)
         /*
          *  It was a request. Prepare an answer message.
          */
-        np->msgout[0] = M_EXTENDED;
-        np->msgout[1] = 2;
-        np->msgout[2] = M_X_WIDE_REQ;
-        np->msgout[3] = wide;
+        spi_populate_width_msg(np->msgout, wide);
 
         np->msgin [0] = M_NOOP;
 
@@ -4245,11 +4219,8 @@ static void sym_wide_nego(struct sym_hcb *np, struct sym_tcb *tp, struct sym_ccb
                  * a single SCSI command (Suggested by Justin Gibbs).
                  */
                 if (tp->tgoal.offset) {
-                        np->msgout[0] = M_EXTENDED;
-                        np->msgout[1] = 3;
-                        np->msgout[2] = M_X_SYNC_REQ;
-                        np->msgout[3] = tp->tgoal.period;
-                        np->msgout[4] = tp->tgoal.offset;
+                        spi_populate_sync_msg(np->msgout, tp->tgoal.period,
+                                        tp->tgoal.offset);
 
                         if (DEBUG_FLAGS & DEBUG_NEGO) {
                                 sym_print_nego_msg(np, cp->target,