IB: Make init_ah_attr_grh_fields set sgid_attr

Use the sgid and other information from the path record to figure out the
sgid_attrs.

Store the selected table entry in the sgid_attr for everything else to
use.

Signed-off-by: Parav Pandit <parav@mellanox.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>

drivers/infiniband/ulp/ipoib/ipoib_main.c

@@ -770,8 +770,10 @@ static void path_rec_completion(int status,
 		struct rdma_ah_attr av;
 
 		if (!ib_init_ah_attr_from_path(priv->ca, priv->port,
-					       pathrec, &av))
+					       pathrec, &av)) {
 			ah = ipoib_create_ah(dev, priv->pd, &av);
+			rdma_destroy_ah_attr(&av);
+		}
 	}
 
 	spin_lock_irqsave(&priv->lock, flags);