[SCSI] sym53c500_cs: convert to use the data buffer accessors

- remove the unnecessary map_single path.

- convert to use the new accessors for the sg lists and the
parameters.

Jens Axboe <jens.axboe@oracle.com> did the for_each_sg cleanup.

Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>

drivers/scsi/pcmcia/sym53c500_cs.c

@@ -370,8 +370,6 @@ SYM53C500_intr(int irq, void *dev_id)
 	DEB(unsigned char seq_reg;)
 	unsigned char status, int_reg;
 	unsigned char pio_status;
-	struct scatterlist *sglist;
-	unsigned int sgcount;
 	int port_base = dev->io_port;
 	struct sym53c500_data *data =
 	    (struct sym53c500_data *)dev->hostdata;
@@ -434,20 +432,19 @@ SYM53C500_intr(int irq, void *dev_id)
 	switch (status & 0x07) {	/* scsi phase */
 	case 0x00:			/* DATA-OUT */
 		if (int_reg & 0x10) {	/* Target requesting info transfer */
+			struct scatterlist *sg;
+			int i;
+
 			curSC->SCp.phase = data_out;
 			VDEB(printk("SYM53C500: Data-Out phase\n"));
 			outb(FLUSH_FIFO, port_base + CMD_REG);
-			LOAD_DMA_COUNT(port_base, curSC->request_bufflen);	/* Max transfer size */
+			LOAD_DMA_COUNT(port_base, scsi_bufflen(curSC));	/* Max transfer size */
 			outb(TRANSFER_INFO | DMA_OP, port_base + CMD_REG);
-			if (!curSC->use_sg)	/* Don't use scatter-gather */
-				SYM53C500_pio_write(fast_pio, port_base, curSC->request_buffer, curSC->request_bufflen);
-			else {	/* use scatter-gather */
-				sgcount = curSC->use_sg;
-				sglist = curSC->request_buffer;
-				while (sgcount--) {
-					SYM53C500_pio_write(fast_pio, port_base, page_address(sglist->page) + sglist->offset, sglist->length);
-					sglist++;
-				}
+
+			scsi_for_each_sg(curSC, sg, scsi_sg_count(curSC), i) {
+				SYM53C500_pio_write(fast_pio, port_base,
+						    page_address(sg->page) + sg->offset,
+						    sg->length);
 			}
 			REG0(port_base);
 		}
@@ -455,20 +452,19 @@ SYM53C500_intr(int irq, void *dev_id)
 
 	case 0x01:		/* DATA-IN */
 		if (int_reg & 0x10) {	/* Target requesting info transfer */
+			struct scatterlist *sg;
+			int i;
+
 			curSC->SCp.phase = data_in;
 			VDEB(printk("SYM53C500: Data-In phase\n"));
 			outb(FLUSH_FIFO, port_base + CMD_REG);
-			LOAD_DMA_COUNT(port_base, curSC->request_bufflen);	/* Max transfer size */
+			LOAD_DMA_COUNT(port_base, scsi_bufflen(curSC));	/* Max transfer size */
 			outb(TRANSFER_INFO | DMA_OP, port_base + CMD_REG);
-			if (!curSC->use_sg)	/* Don't use scatter-gather */
-				SYM53C500_pio_read(fast_pio, port_base, curSC->request_buffer, curSC->request_bufflen);
-			else {	/* Use scatter-gather */
-				sgcount = curSC->use_sg;
-				sglist = curSC->request_buffer;
-				while (sgcount--) {
-					SYM53C500_pio_read(fast_pio, port_base, page_address(sglist->page) + sglist->offset, sglist->length);
-					sglist++;
-				}
+
+			scsi_for_each_sg(curSC, sg, scsi_sg_count(curSC), i) {
+				SYM53C500_pio_read(fast_pio, port_base,
+						   page_address(sg->page) + sg->offset,
+						   sg->length);
 			}
 			REG0(port_base);
 		}
@@ -578,7 +574,7 @@ SYM53C500_queue(struct scsi_cmnd *SCpnt, void (*done)(struct scsi_cmnd *))
 
 	DEB(printk("cmd=%02x, cmd_len=%02x, target=%02x, lun=%02x, bufflen=%d\n", 
 	    SCpnt->cmnd[0], SCpnt->cmd_len, SCpnt->device->id, 
-	    SCpnt->device->lun,  SCpnt->request_bufflen));
+	    SCpnt->device->lun,  scsi_bufflen(SCpnt)));
 
 	VDEB(for (i = 0; i < SCpnt->cmd_len; i++)
 	    printk("cmd[%d]=%02x  ", i, SCpnt->cmnd[i]));