[SCSI] tmscsim: remove bogus endianness conversions

cpu_to_le32 endianness conversions in tmscsim.c, followed by
arithmetic operations don't look correct. Besides, {in,out}[wl]
already perform the necessary conversions. Further, bus addresses
of request buffers are guaranteed to be (mapped) under 4G by
current scsi- and block-layer defaults. This could be explicitly
enforced by using blk_queue_bounce_limit(), which, however,
doesn't seem to be the common practice among SCSI drivers.

Signed-off-by: G. Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>

2 files changed, 17 insertions, 22 deletions

diff --git a/drivers/scsi/tmscsim.c b/drivers/scsi/tmscsim.c
index bc0a007eb893..12d8fea3de93 100644
--- a/drivers/scsi/tmscsim.c
+++ b/drivers/scsi/tmscsim.c
@@ -778,8 +778,8 @@ dc390_DataOut_0( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus)
                 pSRB->pSegmentList++;
                 psgl = pSRB->pSegmentList;
 
-                pSRB->SGBusAddr = cpu_to_le32(pci_dma_lo32(sg_dma_address(psgl)));
-                pSRB->SGToBeXferLen = cpu_to_le32(sg_dma_len(psgl));
+                pSRB->SGBusAddr = sg_dma_address(psgl);
+                pSRB->SGToBeXferLen = sg_dma_len(psgl);
             }
             else
                 pSRB->SGToBeXferLen = 0;
@@ -842,7 +842,7 @@ dc390_DataIn_0( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus)
             DEBUG1(ResidCnt = ((unsigned long) DC390_read8 (CtcReg_High) << 16) \
                 + ((unsigned long) DC390_read8 (CtcReg_Mid) << 8)               \
                 + ((unsigned long) DC390_read8 (CtcReg_Low)));
-            DEBUG1(printk (KERN_DEBUG "Count_2_Zero (ResidCnt=%i,ToBeXfer=%li),", ResidCnt, pSRB->SGToBeXferLen));
+            DEBUG1(printk (KERN_DEBUG "Count_2_Zero (ResidCnt=%u,ToBeXfer=%lu),", ResidCnt, pSRB->SGToBeXferLen));
 
             DC390_write8 (DMA_Cmd, READ_DIRECTION+DMA_IDLE_CMD);
 
@@ -853,8 +853,8 @@ dc390_DataIn_0( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 *psstatus)
                 pSRB->pSegmentList++;
                 psgl = pSRB->pSegmentList;
 
-                pSRB->SGBusAddr = cpu_to_le32(pci_dma_lo32(sg_dma_address(psgl)));
-                pSRB->SGToBeXferLen = cpu_to_le32(sg_dma_len(psgl));
+                pSRB->SGBusAddr = sg_dma_address(psgl);
+                pSRB->SGToBeXferLen = sg_dma_len(psgl);
             }
             else
                 pSRB->SGToBeXferLen = 0;
@@ -921,11 +921,12 @@ din_1:
 
                 ptr = (u8 *) bus_to_virt( pSRB->SGBusAddr );
                 *ptr = bval;
-                pSRB->SGBusAddr++; xferCnt++;
+                pSRB->SGBusAddr++;
+                xferCnt++;
                 pSRB->TotalXferredLen++;
                 pSRB->SGToBeXferLen--;
             }
-            DEBUG1(printk (KERN_DEBUG "Xfered: %li, Total: %li, Remaining: %li\n", xferCnt,\
+            DEBUG1(printk (KERN_DEBUG "Xfered: %lu, Total: %lu, Remaining: %lu\n", xferCnt,\
                            pSRB->TotalXferredLen, pSRB->SGToBeXferLen));
 
         }
@@ -1157,14 +1158,14 @@ dc390_restore_ptr (struct dc390_acb* pACB, struct dc390_srb* pSRB)
             {
                 pSRB->pSegmentList++;
                 psgl = pSRB->pSegmentList;
-                pSRB->SGBusAddr = cpu_to_le32(pci_dma_lo32(sg_dma_address(psgl)));
-                pSRB->SGToBeXferLen = cpu_to_le32(sg_dma_len(psgl));
+                pSRB->SGBusAddr = sg_dma_address(psgl);
+                pSRB->SGToBeXferLen = sg_dma_len(psgl);
             }
             else
                 pSRB->SGToBeXferLen = 0;
         }
-        pSRB->SGToBeXferLen -= (pSRB->Saved_Ptr - pSRB->TotalXferredLen);
-        pSRB->SGBusAddr += (pSRB->Saved_Ptr - pSRB->TotalXferredLen);
+        pSRB->SGToBeXferLen -= pSRB->Saved_Ptr - pSRB->TotalXferredLen;
+        pSRB->SGBusAddr += pSRB->Saved_Ptr - pSRB->TotalXferredLen;
         printk (KERN_INFO "DC390: Pointer restored. Segment %i, Total %li, Bus %08lx\n",
                 pSRB->SGIndex, pSRB->Saved_Ptr, pSRB->SGBusAddr);
 
@@ -1315,8 +1316,8 @@ dc390_DataIO_Comm( struct dc390_acb* pACB, struct dc390_srb* pSRB, u8 ioDir)
         if( !pSRB->SGToBeXferLen )
         {
             psgl = pSRB->pSegmentList;
-            pSRB->SGBusAddr = cpu_to_le32(pci_dma_lo32(sg_dma_address(psgl)));
-            pSRB->SGToBeXferLen = cpu_to_le32(sg_dma_len(psgl));
+            pSRB->SGBusAddr = sg_dma_address(psgl);
+            pSRB->SGToBeXferLen = sg_dma_len(psgl);
             DEBUG1(printk (KERN_DEBUG " DC390: Next SG segment."));
         }
         lval = pSRB->SGToBeXferLen;
diff --git a/drivers/scsi/tmscsim.h b/drivers/scsi/tmscsim.h
index 9b66fa8d38d9..c3d8c80cfb38 100644
--- a/drivers/scsi/tmscsim.h
+++ b/drivers/scsi/tmscsim.h
@@ -19,14 +19,6 @@
 
 #define SEL_TIMEOUT             153     /* 250 ms selection timeout (@ 40 MHz) */
 
-#define pci_dma_lo32(a)                 (a & 0xffffffff)
-
-typedef u8              UCHAR;  /*  8 bits */
-typedef u16             USHORT; /* 16 bits */
-typedef u32             UINT;   /* 32 bits */
-typedef unsigned long   ULONG;  /* 32/64 bits */
-
-
 /*
 ;-----------------------------------------------------------------------
 ; SCSI Request Block
@@ -43,7 +35,9 @@ struct scatterlist	*pSegmentList;
 
 struct scatterlist Segmentx;    /* make a one entry of S/G list table */
 
-unsigned long   SGBusAddr;      /*;a segment starting address as seen by AM53C974A*/
+unsigned long   SGBusAddr;      /*;a segment starting address as seen by AM53C974A
+                                  in CPU endianness. We're only getting 32-bit bus
+                                  addresses by default */
 unsigned long   SGToBeXferLen;  /*; to be xfer length */
 unsigned long   TotalXferredLen;
 unsigned long   SavedTotXLen;