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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>
This commit is contained in:
Joerg Roedel 2009-06-16 12:23:58 +02:00
parent aa010efb7b
commit c79ee4e466
1 changed files with 1 additions and 1 deletions
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2
lib/dma-debug.c
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@ -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)