Commit 6d78b5f9 authored by Russell King's avatar Russell King Committed by Russell King
Browse files

[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: default avatarRussell King <rmk+kernel@arm.linux.org.uk>
parent 4486b863

arch/arm/mm/ioremap.c

+4 −6
Original line number Diff line number Diff line
@@ -280,7 +280,10 @@ __arm_ioremap_pfn(unsigned long pfn, unsigned long offset, size_t size, 
	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 @@ __arm_ioremap(unsigned long phys_addr, size_t size, unsigned int mtype) 
	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);