irkin <mst@mellanox.co.il> 1131577197 -0800
committer Roland Dreier <rolandd@cisco.com> 1131646971 -0800

[IB] mthca: fix posting long lists of receive work requests

In Tavor mode, when posting a long list of receive work requests, a
doorbell must be rung every 256 requests.  Add code to do this when
required.

Signed-off-by: Michael S. Tsirkin <mst@mellanox.co.il>
Signed-off-by: Roland Dreier <rolandd@cisco.com>