[PATCH 20.11] net/mlx5: fix LRO validation in Rx setup

[Michael Baum <michaelba@nvidia.com>]

[ upstream commit a213b8682117711c8e92475c5bbb321a3d8428dd ]

The mlx5_rx_queue_setup() get LRO offload from user.

When LRO is configured, the LRO flag in rxq_data is set to 1.

This patch adds validation to make sure the LRO is supported.

Fixes: 17ed314 ("net/mlx5: allow LRO per Rx queue")

Signed-off-by: Michael Baum <michaelba@nvidia.com>
Acked-by: Matan Azrad <matan@nvidia.com>
---
 drivers/net/mlx5/mlx5_rxq.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/drivers/net/mlx5/mlx5_rxq.c b/drivers/net/mlx5/mlx5_rxq.c
index 4a263a5803..6fad968eee 100644
--- a/drivers/net/mlx5/mlx5_rxq.c
+++ b/drivers/net/mlx5/mlx5_rxq.c
@@ -756,6 +756,14 @@ mlx5_rx_queue_setup(struct rte_eth_dev *dev, uint16_t idx, uint16_t desc,
 	uint16_t n_seg = conf->rx_nseg;
 	int res;
 
+	if ((offloads & RTE_ETH_RX_OFFLOAD_TCP_LRO) &&
+	    !priv->config.lro.supported) {
+		DRV_LOG(ERR,
+			"Port %u queue %u LRO is configured but not supported.",
+			dev->data->port_id, idx);
+		rte_errno = EINVAL;
+		return -rte_errno;
+	}
 	if (mp) {
 		/*
 		 * The parameters should be checked on rte_eth_dev layer.
-- 
2.25.1