qlcnic: fix diag resource allocation

netif_device_attach missing from error path in qlcnic_diag_alloc_res

Signed-off-by: Sony Chacko <sony.chacko@qlogic.com>
Signed-off-by: Amit Kumar Salecha <amit.salecha@qlogic.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/qlcnic/qlcnic_main.c b/drivers/net/qlcnic/qlcnic_main.c
index f147958..b9615bd 100644
--- a/drivers/net/qlcnic/qlcnic_main.c
+++ b/drivers/net/qlcnic/qlcnic_main.c
@@ -1176,6 +1176,7 @@
 	ret = qlcnic_fw_create_ctx(adapter);
 	if (ret) {
 		qlcnic_detach(adapter);
+		netif_device_attach(netdev);
 		return ret;
 	}