Search
SailfishOS Open Build Service
>
Projects
>
home:dcthang:branches:nemo:devel:hw:ti:omap3:n900
>
kernel-adaptation-n900
> linux-2.6.40-omap-iovmm-disallow-mapping-NULL-address-when-IOVMF_.patch
Log In
Username
Password
Cancel
Overview
Repositories
Revisions
Requests
Users
Advanced
Attributes
Meta
File linux-2.6.40-omap-iovmm-disallow-mapping-NULL-address-when-IOVMF_.patch of Package kernel-adaptation-n900
From 787e9dc67785b38ed567c728d5aaa98787403ddc Mon Sep 17 00:00:00 2001 From: Michael Jones <michael.jones@matrix-vision.de> Date: Wed, 9 Mar 2011 09:17:32 +0000 Subject: [PATCH] omap: iovmm: disallow mapping NULL address when IOVMF_DA_ANON is set omap: iovmm: disallow mapping NULL address when IOVMF_DA_ANON is set commit c7f4ab26e3bcdaeb3e19ec658e3ad9092f1a6ceb allowed mapping the NULL address if da_start==0, which would then not get unmapped. Disallow this again if IOVMF_DA_ANON is set. And spell variable 'alignment' correctly. Signed-off-by: Michael Jones <michael.jones@matrix-vision.de> Signed-off-by: Tony Lindgren <tony@atomide.com> --- arch/arm/plat-omap/iovmm.c | 13 +++++++------ 1 files changed, 7 insertions(+), 6 deletions(-) diff --git a/arch/arm/plat-omap/iovmm.c b/arch/arm/plat-omap/iovmm.c index 6dc1296..ea7eab9 100644 --- a/arch/arm/plat-omap/iovmm.c +++ b/arch/arm/plat-omap/iovmm.c @@ -271,20 +271,21 @@ static struct iovm_struct *alloc_iovm_area(struct iommu *obj, u32 da, size_t bytes, u32 flags) { struct iovm_struct *new, *tmp; - u32 start, prev_end, alignement; + u32 start, prev_end, alignment; if (!obj || !bytes) return ERR_PTR(-EINVAL); start = da; - alignement = PAGE_SIZE; + alignment = PAGE_SIZE; if (flags & IOVMF_DA_ANON) { - start = obj->da_start; + /* Don't map address 0 */ + start = obj->da_start ? obj->da_start : alignment; if (flags & IOVMF_LINEAR) - alignement = iopgsz_max(bytes); - start = roundup(start, alignement); + alignment = iopgsz_max(bytes); + start = roundup(start, alignment); } else if (start < obj->da_start || start > obj->da_end || obj->da_end - start < bytes) { return ERR_PTR(-EINVAL); @@ -304,7 +305,7 @@ static struct iovm_struct *alloc_iovm_area(struct iommu *obj, u32 da, goto found; if (tmp->da_end >= start && flags & IOVMF_DA_ANON) - start = roundup(tmp->da_end + 1, alignement); + start = roundup(tmp->da_end + 1, alignment); prev_end = tmp->da_end; } -- 1.7.0.4