net/bonding: fix mbuf fast free handling

[ upstream commit b4924c0 ]

The RTE_ETH_TX_OFFLOAD_MBUF_FAST_FREE offload can't be used in bonding
mode Broadcast and mode 8023AD. Currently, bonding driver forcibly removes
from the dev->data->dev_conf.txmode.offloads and processes as success in
bond_ethdev_configure(). But this still cause that rte_eth_dev_configure()
fails to execute because of the failure of validating Tx offload in the
eth_dev_validate_offloads(). So this patch moves the modification of txmode
offlaods to the stage of adding slave device to report the correct txmode
offloads.

Fixes: 18c4145 ("net/bonding: fix mbuf fast free usage")

Signed-off-by: Huisong Li <lihuisong@huawei.com>
Acked-by: Stephen Hemminger <stephen@networkplumber.org>

drivers/net/bonding/rte_eth_bond_api.c

@@ -541,6 +541,11 @@ __eth_bond_slave_add_lock_free(uint16_t bonded_port_id, uint16_t slave_port_id)
 			return ret;
 	}
 
+	/* Bond mode Broadcast & 8023AD don't support MBUF_FAST_FREE offload. */
+	if (internals->mode == BONDING_MODE_8023AD ||
+	    internals->mode == BONDING_MODE_BROADCAST)
+		internals->tx_offload_capa &= ~RTE_ETH_TX_OFFLOAD_MBUF_FAST_FREE;
+
 	bonded_eth_dev->data->dev_conf.rx_adv_conf.rss_conf.rss_hf &=
 			internals->flow_type_rss_offloads;
 

drivers/net/bonding/rte_eth_bond_pmd.c

@@ -3599,7 +3599,6 @@ bond_ethdev_configure(struct rte_eth_dev *dev)
 	const char *name = dev->device->name;
 	struct bond_dev_private *internals = dev->data->dev_private;
 	struct rte_kvargs *kvlist = internals->kvlist;
-	uint64_t offloads;
 	int arg_count;
 	uint16_t port_id = dev - rte_eth_devices;
 	uint8_t agg_mode;
@@ -3660,16 +3659,6 @@ bond_ethdev_configure(struct rte_eth_dev *dev)
 		}
 	}
 
-	offloads = dev->data->dev_conf.txmode.offloads;
-	if ((offloads & RTE_ETH_TX_OFFLOAD_MBUF_FAST_FREE) &&
-			(internals->mode == BONDING_MODE_8023AD ||
-			internals->mode == BONDING_MODE_BROADCAST)) {
-		RTE_BOND_LOG(WARNING,
-			"bond mode broadcast & 8023AD don't support MBUF_FAST_FREE offload, force disable it.");
-		offloads &= ~RTE_ETH_TX_OFFLOAD_MBUF_FAST_FREE;
-		dev->data->dev_conf.txmode.offloads = offloads;
-	}
-
 	/* set the max_rx_pktlen */
 	internals->max_rx_pktlen = internals->candidate_max_rx_pktlen;