[SCSI] sym2: Remove code to handle DMA_BIDIRECTION requests

[linux-2.6] / drivers / scsi / sym53c8xx_2 / sym_glue.c

diff --git a/drivers/scsi/sym53c8xx_2/sym_glue.c b/drivers/scsi/sym53c8xx_2/sym_glue.c
index a2bfdf8417a2b06f3e8b2ba4941716a5ccb8d63f..d924997db48b44c82773a05742ada92848cd123f 100644 (file)
--- a/drivers/scsi/sym53c8xx_2/sym_glue.c
+++ b/drivers/scsi/sym53c8xx_2/sym_glue.c
@@ -514,9 +514,10 @@ static inline int sym_setup_cdb(struct sym_hcb *np, struct scsi_cmnd *cmd, struc
  */
 int sym_setup_data_and_start(struct sym_hcb *np, struct scsi_cmnd *cmd, struct sym_ccb *cp)
 {
-       int dir;
        struct sym_tcb *tp = &np->target[cp->target];
        struct sym_lcb *lp = sym_lp(tp, cp->lun);
+       u32 lastp, goalp;
+       int dir;
 
        /*
         *  Build the CDB.
@@ -534,15 +535,47 @@ int sym_setup_data_and_start(struct sym_hcb *np, struct scsi_cmnd *cmd, struct s
                        sym_set_cam_status(cmd, DID_ERROR);
                        goto out_abort;
                }
+
+               /*
+                *  No segments means no data.
+                */
+               if (!cp->segments)
+                       dir = DMA_NONE;
        } else {
                cp->data_len = 0;
                cp->segments = 0;
        }
 
        /*
-        *  Set data pointers.
+        *  Set the data pointer.
+        */
+       switch (dir) {
+       case DMA_BIDIRECTIONAL:
+               printk("%s: got DMA_BIDIRECTIONAL command", sym_name(np));
+               sym_set_cam_status(cmd, DID_ERROR);
+               goto out_abort;
+       case DMA_TO_DEVICE:
+               goalp = SCRIPTA_BA(np, data_out2) + 8;
+               lastp = goalp - 8 - (cp->segments * (2*4));
+               break;
+       case DMA_FROM_DEVICE:
+               cp->host_flags |= HF_DATA_IN;
+               goalp = SCRIPTA_BA(np, data_in2) + 8;
+               lastp = goalp - 8 - (cp->segments * (2*4));
+               break;
+       case DMA_NONE:
+       default:
+               lastp = goalp = SCRIPTB_BA(np, no_data);
+               break;
+       }
+
+       /*
+        *  Set all pointers values needed by SCRIPTS.
         */
-       sym_setup_data_pointers(np, cp, dir);
+       cp->phys.head.lastp = cpu_to_scr(lastp);
+       cp->phys.head.savep = cpu_to_scr(lastp);
+       cp->startp          = cp->phys.head.savep;
+       cp->goalp           = cpu_to_scr(goalp);
 
        /*
         *  When `#ifed 1', the code below makes the driver