From 74a01d11c92c06a0ceac88ca306d507a8186e7f6 Mon Sep 17 00:00:00 2001
From: Jody McIntyre <scjody@steamballoon.com>
Date: Mon, 16 May 2005 21:54:05 -0700
Subject: [PATCH] [PATCH] ieee1394: fix cross_bound check for null ISO packets

Fix cross_bound to not return 1 for zero-length regions.  Fixes regression
when sending null ISO packets.

Signed-off-by: Jody McIntyre <scjody@steamballoon.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
---
 drivers/ieee1394/ohci1394.h | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/ieee1394/ohci1394.h b/drivers/ieee1394/ohci1394.h
index d1758d4096..cc66c1cae2 100644
--- a/drivers/ieee1394/ohci1394.h
+++ b/drivers/ieee1394/ohci1394.h
@@ -236,6 +236,9 @@ struct ti_ohci {
 
 static inline int cross_bound(unsigned long addr, unsigned int size)
 {
+	if (size == 0)
+		return 0;
+
 	if (size > PAGE_SIZE)
 		return 1;
 
-- 
2.39.5