[ARM] Fix bounding error in ioremap_pfn()
If size=16M offset=2K then we should map two supersections
rather than just one.
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 f3ade18..7595277 100644
--- a/arch/arm/mm/ioremap.c
+++ b/arch/arm/mm/ioremap.c
@@ -280,7 +280,10 @@
if (!type)
return NULL;
- size = PAGE_ALIGN(size);
+ /*
+ * Page align the mapping size, taking account of any offset.
+ */
+ size = PAGE_ALIGN(offset + size);
area = get_vm_area(size, VM_IOREMAP);
if (!area)
@@ -325,11 +328,6 @@
if (!size || last_addr < phys_addr)
return NULL;
- /*
- * Page align the mapping size
- */
- size = PAGE_ALIGN(last_addr + 1) - phys_addr;
-
return __arm_ioremap_pfn(pfn, offset, size, mtype);
}
EXPORT_SYMBOL(__arm_ioremap);