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From: Weongyo Jeong <weongyo@FreeBSD.org>
Date: Wed, 22 Sep 2010 01:20:05 +0000 (UTC)
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Subject: svn commit: r212987 - user/weongyo/usb/sys/dev/usb
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Author: weongyo
Date: Wed Sep 22 01:20:05 2010
New Revision: 212987
URL: http://svn.freebsd.org/changeset/base/212987

Log:
  Changes the style to access pc->pages information based on the array
  index to make easy to check the maximum boundary of the array.

Modified:
  user/weongyo/usb/sys/dev/usb/usb_busdma.c

Modified: user/weongyo/usb/sys/dev/usb/usb_busdma.c
==============================================================================
--- user/weongyo/usb/sys/dev/usb/usb_busdma.c	Wed Sep 22 00:54:50 2010	(r212986)
+++ user/weongyo/usb/sys/dev/usb/usb_busdma.c	Wed Sep 22 01:20:05 2010	(r212987)
@@ -82,6 +82,7 @@ usbd_get_page(struct usb_page_cache *pc,
     struct usb_page_search *res)
 {
 	struct usb_page *page;
+	int index;
 
 #if USB_HAVE_BUSDMA
 	if (pc->pages != NULL) {
@@ -93,18 +94,19 @@ usbd_get_page(struct usb_page_cache *pc,
 		offset += pc->page_offset_buf;
 		/* compute destination page */
 		page = pc->pages;
+		index = 0;
 		if (pc->ismultiseg) {
-			page += (offset / USB_PAGE_SIZE);
+			index += (offset / USB_PAGE_SIZE);
 			offset %= USB_PAGE_SIZE;
 			res->length = USB_PAGE_SIZE - offset;
-			res->physaddr = page->physaddr + offset;
+			res->physaddr = page[index].physaddr + offset;
 		} else {
 			res->length = 0 - 1;
-			res->physaddr = page->physaddr + offset;
+			res->physaddr = page[index].physaddr + offset;
 		}
 		if (!pc->buffer) {
 			/* Case 1b - Non Kernel Virtual Address */
-			res->buffer = USB_ADD_BYTES(page->buffer, offset);
+			res->buffer = USB_ADD_BYTES(page[index].buffer, offset);
 		}
 		return;
 	}