1 files changed, 9 insertions, 1 deletions

diff --git a/arch/sh/include/asm/io.h b/arch/sh/include/asm/io.h
index b237d525d592..34ba197880dd 100644
--- a/arch/sh/include/asm/io.h
+++ b/arch/sh/include/asm/io.h
@@ -322,7 +322,15 @@ __ioremap_29bit(phys_addr_t offset, unsigned long size, pgprot_t prot)
          * mapping must be done by the PMB or by using page tables.
          */
         if (likely(PXSEG(offset) < P3SEG && PXSEG(last_addr) < P3SEG)) {
-                if (unlikely(pgprot_val(prot) & _PAGE_CACHABLE))
+                u64 flags = pgprot_val(prot);
+
+                /*
+                 * Anything using the legacy PTEA space attributes needs
+                 * to be kicked down to page table mappings.
+                 */
+                if (unlikely(flags & _PAGE_PCC_MASK))
+                        return NULL;
+                if (unlikely(flags & _PAGE_CACHABLE))
                         return (void __iomem *)P1SEGADDR(offset);
 
                 return (void __iomem *)P2SEGADDR(offset);