dma-debug: fix off-by-one error in overlap function

This patch fixes a bug in the overlap function which returned true if one region ends exactly before the second region begins. This is no overlap but the function returned true in that case. Cc: [email protected] Reported-by: Andrew Randrianasulu <[email protected]> Signed-off-by: Joerg Roedel <[email protected]>
liveeasily · Jun 16, 2009 · c79ee4e · c79ee4e
1 parent aa010ef
commit c79ee4e
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/lib/dma-debug.c b/lib/dma-debug.c
@@ -862,7 +862,7 @@ static inline bool overlap(void *addr, u64 size, void *start, void *end)
 
 	return ((addr >= start && addr < end) ||
 		(addr2 >= start && addr2 < end) ||
-		((addr < start) && (addr2 >= end)));
+		((addr < start) && (addr2 > end)));
 }
 
 static void check_for_illegal_area(struct device *dev, void *addr, u64 size)