x86, ioremap: Fix normal ram range check

Check for normal RAM in x86 ioremap() code seems to not work for the
last page frame in the specified physical address range.

Signed-off-by: Kenji Kaneshige <kaneshige.kenji@jp.fujitsu.com>
LKML-Reference: <4C1AE6CD.1080704@jp.fujitsu.com>
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>

1 files changed, 1 insertions, 1 deletions

diff --git a/arch/x86/mm/ioremap.c b/arch/x86/mm/ioremap.c
index 754cb4cbce66..d41d3a9036ca 100644
--- a/arch/x86/mm/ioremap.c
+++ b/arch/x86/mm/ioremap.c
@@ -101,7 +101,7 @@ static void __iomem *__ioremap_caller(resource_size_t phys_addr,
          * Don't allow anybody to remap normal RAM that we're using..
          */
         last_pfn = last_addr >> PAGE_SHIFT;
-        for (pfn = phys_addr >> PAGE_SHIFT; pfn < last_pfn; pfn++) {
+        for (pfn = phys_addr >> PAGE_SHIFT; pfn <= last_pfn; pfn++) {
                 int is_ram = page_is_ram(pfn);
 
                 if (is_ram && pfn_valid(pfn) && !PageReserved(pfn_to_page(pfn)))