committer Jesse Barnes <jbarnes@virtuousgeek.org> 1305152320 -0700

PCI: add ID-based ordering enable/disable support

Add support to allow drivers to enable/disable ID-based ordering.  Where
supported, ID-based ordering can significantly improve the latency of
individual requests by preventing them from queueing up behind unrelated
traffic.

Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
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