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authorJoerg Roedel <joerg.roedel@amd.com>2009-06-16 10:23:58 (GMT)
committerJoerg Roedel <joerg.roedel@amd.com>2009-06-16 10:29:40 (GMT)
commitc79ee4e466dd12347f112e2af306dca35198458f (patch)
tree42c7a2fede416d9702a5affcf68ea198372590db /lib/dma-debug.c
parentaa010efb7b6cd0dfbea8ecf37a6ab587dc2a8560 (diff)
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: stable@kernel.org Reported-by: Andrew Randrianasulu <randrik@mail.ru> Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
Diffstat (limited to 'lib/dma-debug.c')
-rw-r--r--lib/dma-debug.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/lib/dma-debug.c b/lib/dma-debug.c
index 3b93129..a9b6b5c 100644
--- 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)

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