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1f0ef2aa18
As we just did for context cache flushing, clean up the logic around whether we need to flush the iotlb or just the write-buffer, depending on caching mode. Fix the same bug in qi_flush_iotlb() that qi_flush_context() had -- it isn't supposed to be returning an error; it's supposed to be returning a flag which triggers a write-buffer flush. Remove some superfluous conditional write-buffer flushes which could never have happened because they weren't for non-present-to-present mapping changes anyway. Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>