From: Andrew Gallatin <redacted>
Date: Tue, 28 Sep 2010 14:13:12 -0400

This patch contains the following DCA improvements to myri10ge:

1) Finally move myri10ge to use dca3 API

2) Disable PCIe relaxed ordering when enabling DCA on
    myri10ge.  This provides a performance boost on Nehalem
    based Xeons

3) Make sure to properly initialize NIC's DCA state when it is
enabled,
    rather than giving the NIC a bogus tag (0) and waiting for
    the first received packet to trigger an update.  Not using a
    real tag can cause hardware exceptions on some motherboards
    when a CPU socket is empty.

3) Always update the cached CPU when our interrupt affinity changes
    so as to avoid excessive calls to dca3_get_tag()

Signed-off-by: Andrew Gallatin <redacted>
Signed-off-by: Loic Prylli <redacted>

Applied.