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    Subject[PATCH] iommu: fix end address of vm area comparation in alloc_iovm_area
    From cc48c0adaee97c8385a356aefa5b64a51818b4fd Mon Sep 17 00:00:00 2001
    From: Fernando Guzman Lugo <x0095840@ti.com>
    Date: Mon, 16 Aug 2010 22:28:24 -0500
    Subject: [PATCH] iommu: fix end address of vm area comparation in alloc_iovm_area

    End address of the vm area is “start + bytes -1”,
    not “start + byte”. This patch fixes that issue by doing
    an inclusive comparison with tmp->da_start. This issue
    was preventing allocate an area of size exactly the same
    than the free area. I did no change the value of da_end
    of each vm area because it is used to get area size in
    several places.

    Signed-off-by: Fernando Guzman Lugo <x0095840@ti.com>
    ---
    arch/arm/plat-omap/iovmm.c | 2 +-
    1 files changed, 1 insertions(+), 1 deletions(-)

    diff --git a/arch/arm/plat-omap/iovmm.c b/arch/arm/plat-omap/iovmm.c
    index b8bcad5..8745d4e 100644
    --- a/arch/arm/plat-omap/iovmm.c
    +++ b/arch/arm/plat-omap/iovmm.c
    @@ -295,7 +295,7 @@ static struct iovm_struct *alloc_iovm_area(struct iommu *obj, u32 da,
    prev_end = 0;
    list_for_each_entry(tmp, &obj->mmap, list) {

    - if ((prev_end <= start) && (start + bytes < tmp->da_start))
    + if ((prev_end <= start) && (start + bytes <= tmp->da_start))
    goto found;

    if (flags & IOVMF_DA_ANON)
    --
    1.7.0.4
    --
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