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| author | Lennert Buytenhek <buytenh@wantstofly.org> | 2007-02-08 18:26:23 +0300 |
|---|---|---|
| committer | Russell King <rmk+kernel@arm.linux.org.uk> | 2007-02-08 18:29:00 +0300 |
| commit | 3e1a80f11f89f318e892694b501735abb51ef626 (patch) | |
| tree | 668ae6bb4240371f4fd772b2bc5faaf6ada9166e | |
| parent | 7ae5a761d2ffc4cf7d3248e09f4d3da234434f30 (diff) | |
| download | linux-3e1a80f11f89f318e892694b501735abb51ef626.tar.xz | |
[ARM] 4153/1: fix consistent_sync() off-by-one BUG check
In consistent_sync(), start + size can end up pointing one byte
beyond the end of the direct RAM mapping. We shouldn't BUG() when
this happens.
Signed-off-by: Lennert Buytenhek <buytenh@wantstofly.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
| -rw-r--r-- | arch/arm/mm/consistent.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/arm/mm/consistent.c b/arch/arm/mm/consistent.c index 166aee13c4b1..1f9f94f9af4b 100644 --- a/arch/arm/mm/consistent.c +++ b/arch/arm/mm/consistent.c @@ -485,7 +485,7 @@ void consistent_sync(const void *start, size_t size, int direction) { const void *end = start + size; - BUG_ON(!virt_addr_valid(start) || !virt_addr_valid(end)); + BUG_ON(!virt_addr_valid(start) || !virt_addr_valid(end - 1)); switch (direction) { case DMA_FROM_DEVICE: /* invalidate only */ |