1 files changed, 12 insertions, 15 deletions

diff --git a/arch/arm/plat-omap/iovmm.c b/arch/arm/plat-omap/iovmm.c
index 6dc1296c8c77..51ef43e8def6 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;
+        if (~flags & IOVMF_DA_FIXED) {
+                /* 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);
@@ -303,8 +304,8 @@ static struct iovm_struct *alloc_iovm_area(struct iommu *obj, u32 da,
                 if (tmp->da_start > start && (tmp->da_start - start) >= bytes)
                         goto found;
 
-                if (tmp->da_end >= start && flags & IOVMF_DA_ANON)
-                        start = roundup(tmp->da_end + 1, alignement);
+                if (tmp->da_end >= start && ~flags & IOVMF_DA_FIXED)
+                        start = roundup(tmp->da_end + 1, alignment);
 
                 prev_end = tmp->da_end;
         }
@@ -650,7 +651,6 @@ u32 iommu_vmap(struct iommu *obj, u32 da, const struct sg_table *sgt,
         flags &= IOVMF_HW_MASK;
         flags |= IOVMF_DISCONT;
         flags |= IOVMF_MMIO;
-        flags |= (da ? IOVMF_DA_FIXED : IOVMF_DA_ANON);
 
         da = __iommu_vmap(obj, da, sgt, va, bytes, flags);
         if (IS_ERR_VALUE(da))
@@ -690,7 +690,7 @@ EXPORT_SYMBOL_GPL(iommu_vunmap);
  * @flags:      iovma and page property
  *
  * Allocate @bytes linearly and creates 1-n-1 mapping and returns
- * @da again, which might be adjusted if 'IOVMF_DA_ANON' is set.
+ * @da again, which might be adjusted if 'IOVMF_DA_FIXED' is not set.
  */
 u32 iommu_vmalloc(struct iommu *obj, u32 da, size_t bytes, u32 flags)
 {
@@ -709,7 +709,6 @@ u32 iommu_vmalloc(struct iommu *obj, u32 da, size_t bytes, u32 flags)
         flags &= IOVMF_HW_MASK;
         flags |= IOVMF_DISCONT;
         flags |= IOVMF_ALLOC;
-        flags |= (da ? IOVMF_DA_FIXED : IOVMF_DA_ANON);
 
         sgt = sgtable_alloc(bytes, flags, da, 0);
         if (IS_ERR(sgt)) {
@@ -780,7 +779,7 @@ static u32 __iommu_kmap(struct iommu *obj, u32 da, u32 pa, void *va,
  * @flags:      iovma and page property
  *
  * Creates 1-1-1 mapping and returns @da again, which can be
- * adjusted if 'IOVMF_DA_ANON' is set.
+ * adjusted if 'IOVMF_DA_FIXED' is not set.
  */
 u32 iommu_kmap(struct iommu *obj, u32 da, u32 pa, size_t bytes,
                  u32 flags)
@@ -799,7 +798,6 @@ u32 iommu_kmap(struct iommu *obj, u32 da, u32 pa, size_t bytes,
         flags &= IOVMF_HW_MASK;
         flags |= IOVMF_LINEAR;
         flags |= IOVMF_MMIO;
-        flags |= (da ? IOVMF_DA_FIXED : IOVMF_DA_ANON);
 
         da = __iommu_kmap(obj, da, pa, va, bytes, flags);
         if (IS_ERR_VALUE(da))
@@ -838,7 +836,7 @@ EXPORT_SYMBOL_GPL(iommu_kunmap);
  * @flags:      iovma and page property
  *
  * Allocate @bytes linearly and creates 1-1-1 mapping and returns
- * @da again, which might be adjusted if 'IOVMF_DA_ANON' is set.
+ * @da again, which might be adjusted if 'IOVMF_DA_FIXED' is not set.
  */
 u32 iommu_kmalloc(struct iommu *obj, u32 da, size_t bytes, u32 flags)
 {
@@ -858,7 +856,6 @@ u32 iommu_kmalloc(struct iommu *obj, u32 da, size_t bytes, u32 flags)
         flags &= IOVMF_HW_MASK;
         flags |= IOVMF_LINEAR;
         flags |= IOVMF_ALLOC;
-        flags |= (da ? IOVMF_DA_FIXED : IOVMF_DA_ANON);
 
         da = __iommu_kmap(obj, da, pa, va, bytes, flags);
         if (IS_ERR_VALUE(da))