[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>

diff --git a/drivers/ieee1394/ohci1394.h b/drivers/ieee1394/ohci1394.h
index d1758d409610b3906823fb186a8a1325c70fd1dd..cc66c1cae250c1cb105599810637e1ff77ba58bb 100644 (file)
--- 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;