firewire: standardize a variable name

"ret" is the new "retval".

Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
diff --git a/drivers/firewire/fw-iso.c b/drivers/firewire/fw-iso.c
index e14c03d..cb32b20 100644
--- a/drivers/firewire/fw-iso.c
+++ b/drivers/firewire/fw-iso.c
@@ -32,7 +32,7 @@
 fw_iso_buffer_init(struct fw_iso_buffer *buffer, struct fw_card *card,
 		   int page_count, enum dma_data_direction direction)
 {
-	int i, j, retval = -ENOMEM;
+	int i, j;
 	dma_addr_t address;
 
 	buffer->page_count = page_count;
@@ -69,19 +69,19 @@
 	kfree(buffer->pages);
  out:
 	buffer->pages = NULL;
-	return retval;
+	return -ENOMEM;
 }
 
 int fw_iso_buffer_map(struct fw_iso_buffer *buffer, struct vm_area_struct *vma)
 {
 	unsigned long uaddr;
-	int i, retval;
+	int i, ret;
 
 	uaddr = vma->vm_start;
 	for (i = 0; i < buffer->page_count; i++) {
-		retval = vm_insert_page(vma, uaddr, buffer->pages[i]);
-		if (retval)
-			return retval;
+		ret = vm_insert_page(vma, uaddr, buffer->pages[i]);
+		if (ret)
+			return ret;
 		uaddr += PAGE_SIZE;
 	}