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> linux-2.6.40-OMAP-iovmm-no-gap-checking-for-fixed-address.patch
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File linux-2.6.40-OMAP-iovmm-no-gap-checking-for-fixed-address.patch of Package kernel-adaptation-n900
From 26f6c9b4866c7fbb1c63a38c1fc8ae33b200f232 Mon Sep 17 00:00:00 2001 From: Guzman Lugo, Fernando <x0095840@ti.com> Date: Wed, 15 Dec 2010 00:54:00 +0000 Subject: [PATCH] OMAP: iovmm: no gap checking for fixed address OMAP: iovmm: no gap checking for fixed address If some fixed da address is wanted to be mapped and the page is freed but it is used as gap, the mapping will fail. This patch is fixing that and olny keeps the gap for not fixed address. Signed-off-by: Fernando Guzman Lugo <x0095840@ti.com> Acked-by: Hiroshi DOYU <Hiroshi.DOYU@nokia.com> --- arch/arm/plat-omap/iovmm.c | 6 +++--- 1 files changed, 3 insertions(+), 3 deletions(-) diff --git a/arch/arm/plat-omap/iovmm.c b/arch/arm/plat-omap/iovmm.c index 8ce0de2..34f0012 100644 --- a/arch/arm/plat-omap/iovmm.c +++ b/arch/arm/plat-omap/iovmm.c @@ -289,10 +289,10 @@ 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) + if (prev_end > start) break; - if (start + bytes < tmp->da_start) + if (start + bytes <= tmp->da_start) goto found; if (flags & IOVMF_DA_ANON) @@ -301,7 +301,7 @@ static struct iovm_struct *alloc_iovm_area(struct iommu *obj, u32 da, prev_end = tmp->da_end; } - if ((start > prev_end) && (ULONG_MAX - start >= bytes)) + if ((start >= prev_end) && (ULONG_MAX - start + 1 >= bytes)) goto found; dev_dbg(obj->dev, "%s: no space to fit %08x(%x) flags: %08x\n", -- 1.7.0.4