nfp: update port state in place

Always updating port state in place by overriding values in exiting
pf->eth_tbl makes things easier to manage and allows us to have a
common helper for both full and per-port refresh.
Signed-off-by: NJakub Kicinski <jakub.kicinski@netronome.com>
Reviewed-by: NSimon Horman <simon.horman@netronome.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

drivers/net/ethernet/netronome/nfp/nfp_net_main.c

@@ -518,6 +518,30 @@ static void nfp_net_pci_remove_finish(struct nfp_pf *pf)
 	nfp_cpp_area_release_free(pf->data_vnic_bar);
 }
 
+static int
+nfp_net_eth_port_update(struct nfp_cpp *cpp, struct nfp_port *port,
+			struct nfp_eth_table *eth_table)
+{
+	struct nfp_eth_table_port *eth_port;
+
+	ASSERT_RTNL();
+
+	eth_port = nfp_net_find_port(eth_table, port->eth_id);
+	if (!eth_port) {
+		nfp_warn(cpp, "Warning: port #%d not present after reconfig\n",
+			 port->eth_id);
+		return -EIO;
+	}
+	if (eth_port->override_changed) {
+		nfp_warn(cpp, "Port #%d config changed, unregistering. Reboot required before port will be operational again.\n", port->eth_id);
+		port->type = NFP_PORT_INVALID;
+	}
+
+	memcpy(port->eth_port, eth_port, sizeof(*eth_port));
+
+	return 0;
+}
+
 static void nfp_net_refresh_vnics(struct work_struct *work)
 {
 	struct nfp_pf *pf = container_of(work, struct nfp_pf,
@@ -544,23 +568,12 @@ static void nfp_net_refresh_vnics(struct work_struct *work)
 	list_for_each_entry(nn, &pf->vnics, vnic_list) {
 		if (!__nfp_port_get_eth_port(nn->port))
 			continue;
-		nn->port->eth_port = nfp_net_find_port(eth_table,
-						       nn->port->eth_id);
-		if (!nn->port->eth_port) {
-			nfp_warn(pf->cpp, "Warning: port #%d not present after reconfig\n",
-				 nn->port->eth_id);
-			continue;
-		}
-		if (nn->port->eth_port->override_changed) {
-			nfp_warn(pf->cpp, "Port config changed, unregistering. Reboot required before port will be operational again.\n");
-			nn->port->type = NFP_PORT_INVALID;
-			continue;
-		}
+
+		nfp_net_eth_port_update(pf->cpp, nn->port, eth_table);
 	}
 	rtnl_unlock();
 
-	kfree(pf->eth_tbl);
-	pf->eth_tbl = eth_table;
+	kfree(eth_table);
 
 	list_for_each_entry_safe(nn, next, &pf->vnics, vnic_list) {
 		if (!nn->port || nn->port->type != NFP_PORT_INVALID)
@@ -588,8 +601,8 @@ void nfp_net_refresh_port_table(struct nfp_port *port)
 int nfp_net_refresh_eth_port(struct nfp_port *port)
 {
 	struct nfp_cpp *cpp = port->app->cpp;
-	struct nfp_eth_table_port *eth_port;
 	struct nfp_eth_table *eth_table;
+	int ret;
 
 	eth_table = nfp_eth_read_ports(cpp);
 	if (!eth_table) {
@@ -597,18 +610,11 @@ int nfp_net_refresh_eth_port(struct nfp_port *port)
 		return -EIO;
 	}
 
-	eth_port = nfp_net_find_port(eth_table, port->eth_id);
-	if (!eth_port) {
-		nfp_err(cpp, "Error finding state of the port!\n");
-		kfree(eth_table);
-		return -EIO;
-	}
-
-	memcpy(port->eth_port, eth_port, sizeof(*eth_port));
+	ret = nfp_net_eth_port_update(cpp, port, eth_table);
 
 	kfree(eth_table);
 
-	return 0;
+	return ret;
 }
 
 /*