1 files changed, 6 insertions, 0 deletions

diff --git a/arch/arm/mm/ioremap.c b/arch/arm/mm/ioremap.c
index 28c8b950ef04..03f11935ed08 100644
--- a/arch/arm/mm/ioremap.c
+++ b/arch/arm/mm/ioremap.c
@@ -268,6 +268,12 @@ void __iomem * __arm_ioremap_pfn_caller(unsigned long pfn,
         if (pfn >= 0x100000 && (__pfn_to_phys(pfn) & ~SUPERSECTION_MASK))
                 return NULL;
 
+        /*
+         * Don't allow RAM to be mapped - this causes problems with ARMv6+
+         */
+        if (WARN_ON(pfn_valid(pfn)))
+                return NULL;
+
         type = get_mem_type(mtype);
         if (!type)
                 return NULL;