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ARM: 7917/1: cacheflush: correctly limit range of memory region being flushed
The __do_cache_op function operates with a 'chunk' size of one page but fails to limit the size of the final chunk so as to not exceed the specified memory region. Fix this. Cc: <stable@vger.kernel.org> Reported-by: Christian Gmeiner <christian.gmeiner@gmail.com> Tested-by: Christian Gmeiner <christian.gmeiner@gmail.com> Acked-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Jon Medhurst <tixy@linaro.org> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
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@ -509,9 +509,10 @@ static inline int
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__do_cache_op(unsigned long start, unsigned long end)
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{
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int ret;
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unsigned long chunk = PAGE_SIZE;
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do {
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unsigned long chunk = min(PAGE_SIZE, end - start);
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if (signal_pending(current)) {
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struct thread_info *ti = current_thread_info();
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