arm: mm: fix faulty calculation of area to perform cache operation
From: Russell King - ARM Linux <hidden>
Date: 2012-03-29 12:10:01
Also in:
linux-arch, linux-samsung-soc
On Thu, Mar 29, 2012 at 06:55:32PM +0900, Cho KyongHo wrote:
In dma_cache_maint_page(), if offset is larger than PAGE_SIZE, len becomes PAGE_SIZE - offset. If size is smaller than PAGE_SIZE - offset, next calcuation of left cause overflow.
It is invalid for offset to be larger than PAGE_SIZE here.