IB/mlx4: Create paravirt contexts for VFs when master IB driver initializes

When we have VFs and PFs on same host, the VFs are activated within
the mlx4_core module before the mlx4_ib kernel module is loaded.

When the mlx4_ib module initializes the PF (master), it now creates
MAD paravirtualization contexts for any VFs that already active.

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

1 files changed, 3 insertions, 0 deletions

diff --git a/drivers/infiniband/hw/mlx4/mad.c b/drivers/infiniband/hw/mlx4/mad.c
index 658a622791fb..21a794152d15 100644
--- a/drivers/infiniband/hw/mlx4/mad.c
+++ b/drivers/infiniband/hw/mlx4/mad.c
@@ -1652,6 +1652,9 @@ static int create_pv_resources(struct ib_device *ibdev, int slave, int port,
 {
         int ret, cq_size;
 
+        if (ctx->state != DEMUX_PV_STATE_DOWN)
+                return -EEXIST;
+
         ctx->state = DEMUX_PV_STATE_STARTING;
         /* have QP0 only on port owner, and only if link layer is IB */
         if (ctx->slave == mlx4_master_func_num(to_mdev(ctx->ib_dev)->dev) &&