omap: iommu: fix incorrect address for supersection 1st entry

There was a potential risk that the following "memset" could override
its range if a given address was not the 1st entry of a
supersection. This is not the case for "iovmm".

Signed-off-by: Hiroshi DOYU <Hiroshi.DOYU@nokia.com>
Signed-off-by: Hari Nagalla <hnagalla@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>

diff --git a/arch/arm/plat-omap/iommu.c b/arch/arm/plat-omap/iommu.c
index 463d638..e748119 100644 (file)
--- a/arch/arm/plat-omap/iommu.c
+++ b/arch/arm/plat-omap/iommu.c
@@ -667,7 +667,7 @@ static size_t iopgtable_clear_entry_core(struct iommu *obj, u32 da)
                if ((*iopgd & IOPGD_SUPER) == IOPGD_SUPER) {
                        nent *= 16;
                        /* rewind to the 1st entry */
-                       iopgd = (u32 *)((u32)iopgd & IOSUPER_MASK);
+                       iopgd = iopgd_offset(obj, (da & IOSUPER_MASK));
                }
                bytes *= nent;
        }