It fixes the issue of v4 RSS configuration failure in vmxnet3_v4_rss_configure() while writing to BAR register. It's very specific to single queue configuration.
https://mails.dpdk.org/archives/users/2025-April/008236.html Bugzilla ID:1789 Fixes: 52ec00f ("net/vmxnet3: fix RSS setting on v4") Cc: [email protected] v2: - Fixed typo in commit message v3: - Checking if RSS is already enabled Signed-off-by: Amiya Ranjan Mohakud <[email protected]> --- drivers/net/vmxnet3/vmxnet3_ethdev.c | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/drivers/net/vmxnet3/vmxnet3_ethdev.c b/drivers/net/vmxnet3/vmxnet3_ethdev.c index f4cdb1bb31..a0306af86c 100644 --- a/drivers/net/vmxnet3/vmxnet3_ethdev.c +++ b/drivers/net/vmxnet3/vmxnet3_ethdev.c @@ -534,6 +534,13 @@ vmxnet3_dev_configure(struct rte_eth_dev *dev) PMD_INIT_FUNC_TRACE(); + /* Disabling RSS for single queue pair */ + if (dev->data->nb_rx_queues == 1 && + dev->data->dev_conf.rxmode.mq_mode == RTE_ETH_MQ_RX_RSS) { + dev->data->dev_conf.rxmode.mq_mode = RTE_ETH_MQ_RX_NONE; + PMD_INIT_LOG(ERR, "WARN: Disabling RSS for single Rx queue"); + } + if (dev->data->dev_conf.rxmode.mq_mode & RTE_ETH_MQ_RX_RSS_FLAG) dev->data->dev_conf.rxmode.offloads |= RTE_ETH_RX_OFFLOAD_RSS_HASH; -- 2.39.5 (Apple Git-154)
