IB/hfi1: Fix hfi1_netdev_rx_init() error handling

The hfi1_vnic_up() function doesn't check whether hfi1_netdev_rx_init()
returns errors.  In hfi1_vnic_init() we need to change the code to
preserve the error code instead of returning success.

Fixes: 2280740f ("IB/hfi1: Virtual Network Interface Controller (VNIC) HW support")
Fixes: 4730f4a6 ("IB/hfi1: Activate the dummy netdev")
Link: https://lore.kernel.org/r/20200530140224.GA1330098@mwandaSigned-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>

drivers/infiniband/hw/hfi1/vnic_main.c

@@ -457,13 +457,19 @@ static int hfi1_vnic_up(struct hfi1_vnic_vport_info *vinfo)
 	if (rc < 0)
 		return rc;
 
-	hfi1_netdev_rx_init(dd);
+	rc = hfi1_netdev_rx_init(dd);
+	if (rc)
+		goto err_remove;
 
 	netif_carrier_on(netdev);
 	netif_tx_start_all_queues(netdev);
 	set_bit(HFI1_VNIC_UP, &vinfo->flags);
 
 	return 0;
+
+err_remove:
+	hfi1_netdev_remove_data(dd, VNIC_ID(vinfo->vesw_id));
+	return rc;
 }
 
 static void hfi1_vnic_down(struct hfi1_vnic_vport_info *vinfo)
@@ -512,7 +518,8 @@ static int hfi1_vnic_init(struct hfi1_vnic_vport_info *vinfo)
 			goto txreq_fail;
 	}
 
-	if (hfi1_netdev_rx_init(dd)) {
+	rc = hfi1_netdev_rx_init(dd);
+	if (rc) {
 		dd_dev_err(dd, "Unable to initialize netdev contexts\n");
 		goto alloc_fail;
 	}