In message: <200905122114.n4cleag9033...@svn.freebsd.org>
Stanislav Sedov <s...@freebsd.org> writes:
: @@ -926,6 +937,7 @@ atestart_locked(struct ifnet *ifp)
: * tell the hardware to xmit the packet.
: */
: WR4(sc, ETH_TAR, segs[0].ds_addr);
: + BARRIER(sc, ETH_TAR, 8, BUS_SPACE_BARRIER_WRITE);
: WR4(sc, ETH_TCR, segs[0].ds_len);
Why is a barrier needed here?
Warner
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