[SPARC]: Respect vm_page_prot in io_remap_page_range().

Make sure the callers do a pgprot_noncached() on
vma->vm_page_prot.

Pointed out by Hugh Dickens.

Signed-off-by: David S. Miller <davem@davemloft.net>

2 files changed, 1 insertions, 2 deletions

diff --git a/arch/sparc64/kernel/pci.c b/arch/sparc64/kernel/pci.c
index 95ffa9418620..dfccff29e182 100644
--- a/arch/sparc64/kernel/pci.c
+++ b/arch/sparc64/kernel/pci.c
@@ -656,6 +656,7 @@ int pci_mmap_page_range(struct pci_dev *dev, struct vm_area_struct *vma,
         __pci_mmap_set_flags(dev, vma, mmap_state);
         __pci_mmap_set_pgprot(dev, vma, mmap_state);
 
+        vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
         ret = io_remap_pfn_range(vma, vma->vm_start,
                                  vma->vm_pgoff,
                                  vma->vm_end - vma->vm_start,
@@ -663,7 +664,6 @@ int pci_mmap_page_range(struct pci_dev *dev, struct vm_area_struct *vma,
         if (ret)
                 return ret;
 
-        vma->vm_flags |= VM_IO;
         return 0;
 }
 
diff --git a/arch/sparc64/mm/generic.c b/arch/sparc64/mm/generic.c
index 5fc5c579e35e..8cb06205d265 100644
--- a/arch/sparc64/mm/generic.c
+++ b/arch/sparc64/mm/generic.c
@@ -140,7 +140,6 @@ int io_remap_pfn_range(struct vm_area_struct *vma, unsigned long from,
         vma->vm_flags |= VM_IO | VM_RESERVED | VM_PFNMAP;
         vma->vm_pgoff = phys_base >> PAGE_SHIFT;
 
-        prot = __pgprot(pg_iobits);
         offset -= from;
         dir = pgd_offset(mm, from);
         flush_cache_range(vma, beg, end);