[ARM] Fix BUG()s in ioremap() code

We need to ensure that the area size is page aligned so that
remap_area_pte() doesn't increment the address past the end of
the desired area.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

1 files changed, 2 insertions, 0 deletions

diff --git a/arch/arm/mm/ioremap.c b/arch/arm/mm/ioremap.c
index 3bb3951920bc..251685fe73a8 100644
--- a/arch/arm/mm/ioremap.c
+++ b/arch/arm/mm/ioremap.c
@@ -292,6 +292,8 @@ __ioremap_pfn(unsigned long pfn, unsigned long offset, size_t size,
         if (pfn >= 0x100000 && (__pfn_to_phys(pfn) & ~SUPERSECTION_MASK))
                 return NULL;
 
+        size = PAGE_ALIGN(size);
+
         area = get_vm_area(size, VM_IOREMAP);
         if (!area)
                 return NULL;