diff options
author | Colin Cross <ccross@android.com> | 2011-01-21 17:04:36 -0800 |
---|---|---|
committer | Dan Willemsen <dwillemsen@nvidia.com> | 2011-11-30 21:36:55 -0800 |
commit | 65f8ea39ef30a5a70174679099801f44aecd478f (patch) | |
tree | 809cfc52e5934e5b7479415255d48bcdf00c430d /arch/arm/mach-tegra/io.c | |
parent | 9e1a807ebb156507c30a835e4a54ba975f980260 (diff) |
ARM: tegra: Prevent dynamically ioremapping device io memory
Change-Id: I893a42bd773b1acdf2b83f8602fe1aa6a8ea6741
Signed-off-by: Colin Cross <ccross@android.com>
Diffstat (limited to 'arch/arm/mach-tegra/io.c')
-rw-r--r-- | arch/arm/mach-tegra/io.c | 14 |
1 files changed, 13 insertions, 1 deletions
diff --git a/arch/arm/mach-tegra/io.c b/arch/arm/mach-tegra/io.c index 87125e2a4532..35db99f116be 100644 --- a/arch/arm/mach-tegra/io.c +++ b/arch/arm/mach-tegra/io.c @@ -85,8 +85,20 @@ void __init tegra_map_common_io(void) void __iomem *tegra_ioremap(unsigned long p, size_t size, unsigned int type) { void __iomem *v = IO_ADDRESS(p); - if (v == NULL) + + /* + * __arm_ioremap fails to set the domain of ioremapped memory + * correctly, only use it on physical memory. + */ + if (v == NULL && p < SZ_1G) v = __arm_ioremap(p, size, type); + + /* + * If the physical address was not physical memory or statically + * mapped, there's nothing we can do to map it safely. + */ + BUG_ON(v == NULL); + return v; } EXPORT_SYMBOL(tegra_ioremap); |