[PATCH] net/bonding: make bonded device configure method re-entrant

[Ivan Malov <ivan.malov@oktetlabs.ru>]

According to the documentation, rte_eth_dev_configure()
can be invoked repeatedly while in stopped state.
The current implementation in the bonding driver
allows for that (technically), but the user sees
warnings which say that back-end devices have
already been harnessed. Re-factor the code
to have cleanup before each (re-)configure.

Signed-off-by: Ivan Malov <ivan.malov@oktetlabs.ru>
Reviewed-by: Andrew Rybchenko <andrew.rybchenko@oktetlabs.ru>
---
 drivers/net/bonding/rte_eth_bond_pmd.c | 27 ++++++++++++++++++--------
 1 file changed, 19 insertions(+), 8 deletions(-)

diff --git a/drivers/net/bonding/rte_eth_bond_pmd.c b/drivers/net/bonding/rte_eth_bond_pmd.c
index d01c954296..92a33b45bd 100644
--- a/drivers/net/bonding/rte_eth_bond_pmd.c
+++ b/drivers/net/bonding/rte_eth_bond_pmd.c
@@ -2143,18 +2143,13 @@ bond_ethdev_stop(struct rte_eth_dev *eth_dev)
 	return 0;
 }
 
-int
-bond_ethdev_close(struct rte_eth_dev *dev)
+static void
+bond_ethdev_cfg_cleanup(struct rte_eth_dev *dev)
 {
 	struct bond_dev_private *internals = dev->data->dev_private;
 	uint16_t bond_port_id = internals->port_id;
-	int skipped = 0;
 	struct rte_flow_error ferror;
-
-	if (rte_eal_process_type() != RTE_PROC_PRIMARY)
-		return 0;
-
-	RTE_BOND_LOG(INFO, "Closing bonded device %s", dev->device->name);
+	int skipped = 0;
 
 	/* Flush flows in all back-end devices before removing them */
 	bond_flow_ops.flush(dev, &ferror);
@@ -2176,6 +2171,20 @@ bond_ethdev_close(struct rte_eth_dev *dev)
 			skipped++;
 		}
 	}
+}
+
+int
+bond_ethdev_close(struct rte_eth_dev *dev)
+{
+	struct bond_dev_private *internals = dev->data->dev_private;
+
+	if (rte_eal_process_type() != RTE_PROC_PRIMARY)
+		return 0;
+
+	RTE_BOND_LOG(INFO, "Closing bonded device %s", dev->device->name);
+
+	bond_ethdev_cfg_cleanup(dev);
+
 	bond_ethdev_free_queues(dev);
 	rte_bitmap_reset(internals->vlan_filter_bmp);
 	rte_bitmap_free(internals->vlan_filter_bmp);
@@ -3606,6 +3615,8 @@ bond_ethdev_configure(struct rte_eth_dev *dev)
 
 	unsigned i, j;
 
+	bond_ethdev_cfg_cleanup(dev);
+
 	/*
 	 * If RSS is enabled, fill table with default values and
 	 * set key to the value specified in port RSS configuration.
-- 
2.30.2