[dpdk-dev] [PATCH v2 16/17] net/hns3: fix configuring device with RSS is enabled

["Wei Hu (Xavier)" <huwei013@chinasoftinc.com>]

From: "Wei Hu (Xavier)" <xavier.huwei@huawei.com>

Currently, when running the following commands in the CLI of testpmd
application, the driver reports an -EINVAL error when performing the No.3
step.
1) flow create 0 ingress pattern end actions rss key <key> func simple_xor
     types all end / end
2) flow flush 0
3) port config dcb vt off pfc off

The root cause as below:
In the No.2 step, when RSS rules is flushed, we set the the flag
hw->rss_dis_flag with true to indicate RSS id disabled. And in the No.3
step, calling rte_eth_dev_configure API function, the internal function
named hns3_dev_rss_hash_update check hw->rss_dis_flag is true and return
-EINVAL.

When user calls the rte_eth_dev_configure API function with the input
parameter dev_conf->rxmode.mq_mode having ETH_MQ_RX_RSS_FLAG to enable RSS,
driver should set internal flag hw->rss_dis_flag with false to indicate RSS
is enabled in the '.dev_configure' ops implementation function named
hns3_dev_configure and hns3vf_dev_configure.

Fixes: 5e782bc2570c ("net/hns3: fix configuring RSS hash when rules are flushed")
Cc: stable@dpdk.org

Signed-off-by: Lijun Ou <oulijun@huawei.com>
Signed-off-by: Wei Hu (Xavier) <xavier.huwei@huawei.com>
---
 drivers/net/hns3/hns3_ethdev.c    | 1 +
 drivers/net/hns3/hns3_ethdev_vf.c | 1 +
 2 files changed, 2 insertions(+)

diff --git a/drivers/net/hns3/hns3_ethdev.c b/drivers/net/hns3/hns3_ethdev.c
index 10cfc5d..99bcc7a 100644
--- a/drivers/net/hns3/hns3_ethdev.c
+++ b/drivers/net/hns3/hns3_ethdev.c
@@ -2326,6 +2326,7 @@ hns3_dev_configure(struct rte_eth_dev *dev)
 	if ((uint32_t)mq_mode & ETH_MQ_RX_RSS_FLAG) {
 		conf->rxmode.offloads |= DEV_RX_OFFLOAD_RSS_HASH;
 		rss_conf = conf->rx_adv_conf.rss_conf;
+		hw->rss_dis_flag = false;
 		if (rss_conf.rss_key == NULL) {
 			rss_conf.rss_key = rss_cfg->key;
 			rss_conf.rss_key_len = HNS3_RSS_KEY_SIZE;
diff --git a/drivers/net/hns3/hns3_ethdev_vf.c b/drivers/net/hns3/hns3_ethdev_vf.c
index cb2747b..4c73441 100644
--- a/drivers/net/hns3/hns3_ethdev_vf.c
+++ b/drivers/net/hns3/hns3_ethdev_vf.c
@@ -783,6 +783,7 @@ hns3vf_dev_configure(struct rte_eth_dev *dev)
 	/* When RSS is not configured, redirect the packet queue 0 */
 	if ((uint32_t)mq_mode & ETH_MQ_RX_RSS_FLAG) {
 		conf->rxmode.offloads |= DEV_RX_OFFLOAD_RSS_HASH;
+		hw->rss_dis_flag = false;
 		rss_conf = conf->rx_adv_conf.rss_conf;
 		if (rss_conf.rss_key == NULL) {
 			rss_conf.rss_key = rss_cfg->key;
-- 
2.9.5