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authorHiroshi DOYU <Hiroshi.DOYU@nokia.com>2009-11-22 10:11:02 -0800
committerTony Lindgren <tony@atomide.com>2009-11-22 10:24:32 -0800
commit935e4739fc4817b1044fdbeed5fe19aee9f03f45 (patch)
tree82c3328d9d799cde8c64e126e219e4493f395e45 /arch
parent58a5491c936957011c92f8cc5097fb3231ee3f9c (diff)
downloadlinux-linaro-stable-935e4739fc4817b1044fdbeed5fe19aee9f03f45.tar.gz
omap: iommu: avoid remapping if it's been mapped in MPU side
MPU side (v)-(p) mapping is necessary only if IOVMF_MMIO is set in "flags". Signed-off-by: Hiroshi DOYU <Hiroshi.DOYU@nokia.com> Signed-off-by: Tony Lindgren <tony@atomide.com>
Diffstat (limited to 'arch')
-rw-r--r--arch/arm/plat-omap/iovmm.c10
1 files changed, 6 insertions, 4 deletions
diff --git a/arch/arm/plat-omap/iovmm.c b/arch/arm/plat-omap/iovmm.c
index 0ce36bbef9d2..577d8c03b8e1 100644
--- a/arch/arm/plat-omap/iovmm.c
+++ b/arch/arm/plat-omap/iovmm.c
@@ -617,7 +617,7 @@ u32 iommu_vmap(struct iommu *obj, u32 da, const struct sg_table *sgt,
u32 flags)
{
size_t bytes;
- void *va;
+ void *va = NULL;
if (!obj || !obj->dev || !sgt)
return -EINVAL;
@@ -627,9 +627,11 @@ u32 iommu_vmap(struct iommu *obj, u32 da, const struct sg_table *sgt,
return -EINVAL;
bytes = PAGE_ALIGN(bytes);
- va = vmap_sg(sgt);
- if (IS_ERR(va))
- return PTR_ERR(va);
+ if (flags & IOVMF_MMIO) {
+ va = vmap_sg(sgt);
+ if (IS_ERR(va))
+ return PTR_ERR(va);
+ }
flags &= IOVMF_HW_MASK;
flags |= IOVMF_DISCONT;