diff mbox

omap iommu: avoid remapping if it's been mapped in MPU side

Message ID 20090826.134540.189712717.Hiroshi.DOYU@nokia.com (mailing list archive)
State Accepted
Commit 3b61e08a6ea37d353d98979040aef10f7cf6f83d
Headers show

Commit Message

Hiroshi DOYU Aug. 26, 2009, 10:45 a.m. UTC 
None
diff mbox

Patch

diff --git a/arch/arm/plat-omap/iovmm.c b/arch/arm/plat-omap/iovmm.c
index 6fc52fc..004fd83 100644
--- a/arch/arm/plat-omap/iovmm.c
+++ b/arch/arm/plat-omap/iovmm.c
@@ -615,7 +615,7 @@  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;
@@ -625,9 +625,11 @@  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;