From 25476b0209b2e48dfb689e1b4cf7278875082b1f Mon Sep 17 00:00:00 2001
From: Jack Morgenstein <jackm@dev.mellanox.co.il>
Date: Thu, 11 Sep 2014 14:11:20 +0300
Subject: [PATCH] IB/mlx4: Fix VF mac handling in RoCE

We had several problems here.  First, a race condition on QP1 mac
handling between mlx4_ib_update_qps and mlx4_ib_modify_qp, which is
fixed by taking the qp mutex in mlx4_ib_update_qps.

Also, qp->pri.smac_port was not updated in mlx4_ib_update_qps.

Last, in __mlx4_ib_modify_qp we did not properly handle the case where
the mac is zero, but port is non-zero.

Signed-off-by: Jack Morgenstein <jackm@dev.mellanox.co.il>
Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
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