[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>

diff --git a/arch/arm/mm/ioremap.c b/arch/arm/mm/ioremap.c
index 3bb3951..251685f 100644 (file)
--- 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;