[PATCH v2] net/bonding: fix RSS not work for bonding

[Yu Wenjun <yuwenjun@cmss.chinamobile.com>]

RSS don't work when bond_ethdev_configure called before
rte_eth_bond_slave_add.

e.g.:
dont't work(examples/bond/main.c):
rte_eth_bond_create()
rte_eth_dev_configure()
rte_eth_bond_slave_add()
rte_eth_dev_start()

work(testpmd):
rte_eth_bond_create()
rte_eth_bond_slave_add()
rte_eth_dev_configure()
rte_eth_dev_start()

Fixes: 6b1a001ec546 ("net/bonding: fix RSS key length")
Cc: stable@dpdk.org

Signed-off-by: Yu Wenjun <yuwenjun@cmss.chinamobile.com>
---
v2:
- Fixed patch format.

 drivers/net/bonding/rte_eth_bond_pmd.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/drivers/net/bonding/rte_eth_bond_pmd.c b/drivers/net/bonding/rte_eth_bond_pmd.c
index 84f4900..31bcee1 100644
--- a/drivers/net/bonding/rte_eth_bond_pmd.c
+++ b/drivers/net/bonding/rte_eth_bond_pmd.c
@@ -3504,6 +3504,11 @@ struct bwg_slave {
 	if (dev->data->dev_conf.rxmode.mq_mode & RTE_ETH_MQ_RX_RSS) {
 		struct rte_eth_rss_conf *rss_conf =
 			&dev->data->dev_conf.rx_adv_conf.rss_conf;
+
+		if (internals->rss_key_len == 0) {
+			internals->rss_key_len = sizeof(default_rss_key);
+		}
+
 		if (rss_conf->rss_key != NULL) {
 			if (internals->rss_key_len > rss_conf->rss_key_len) {
 				RTE_BOND_LOG(ERR, "Invalid rss key length(%u)",
-- 
1.8.3.1