[SG] Update drivers to use sg helpers

Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
diff --git a/drivers/scsi/ide-scsi.c b/drivers/scsi/ide-scsi.c
index 252d180..8d0244c 100644
--- a/drivers/scsi/ide-scsi.c
+++ b/drivers/scsi/ide-scsi.c
@@ -175,18 +175,18 @@
 
 	while (bcount) {
 		count = min(pc->sg->length - pc->b_count, bcount);
-		if (PageHighMem(pc->sg->page)) {
+		if (PageHighMem(sg_page(pc->sg))) {
 			unsigned long flags;
 
 			local_irq_save(flags);
-			buf = kmap_atomic(pc->sg->page, KM_IRQ0) +
+			buf = kmap_atomic(sg_page(pc->sg), KM_IRQ0) +
 					pc->sg->offset;
 			drive->hwif->atapi_input_bytes(drive,
 						buf + pc->b_count, count);
 			kunmap_atomic(buf - pc->sg->offset, KM_IRQ0);
 			local_irq_restore(flags);
 		} else {
-			buf = page_address(pc->sg->page) + pc->sg->offset;
+			buf = sg_virt(pc->sg);
 			drive->hwif->atapi_input_bytes(drive,
 						buf + pc->b_count, count);
 		}
@@ -212,18 +212,18 @@
 
 	while (bcount) {
 		count = min(pc->sg->length - pc->b_count, bcount);
-		if (PageHighMem(pc->sg->page)) {
+		if (PageHighMem(sg_page(pc->sg))) {
 			unsigned long flags;
 
 			local_irq_save(flags);
-			buf = kmap_atomic(pc->sg->page, KM_IRQ0) +
+			buf = kmap_atomic(sg_page(pc->sg), KM_IRQ0) +
 						pc->sg->offset;
 			drive->hwif->atapi_output_bytes(drive,
 						buf + pc->b_count, count);
 			kunmap_atomic(buf - pc->sg->offset, KM_IRQ0);
 			local_irq_restore(flags);
 		} else {
-			buf = page_address(pc->sg->page) + pc->sg->offset;
+			buf = sg_virt(pc->sg);
 			drive->hwif->atapi_output_bytes(drive,
 						buf + pc->b_count, count);
 		}