Take minimum and maximum MTU values for subdevices and
report maximum of minimums and minimum of maximums.

Fixes: ad97ceece12c ("ethdev: add min/max MTU to device info")
Cc: stable@dpdk.org

Signed-off-by: Andrew Rybchenko <redacted>
---
 drivers/net/failsafe/failsafe_ops.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/net/failsafe/failsafe_ops.c 

b/drivers/net/failsafe/failsafe_ops.c
index 76d64871b4..5e6fb369e1 100644

--- a/drivers/net/failsafe/failsafe_ops.c
+++ b/drivers/net/failsafe/failsafe_ops.c

@@ -1095,6 +1095,8 @@ static void
 fs_dev_merge_info(struct rte_eth_dev_info *info,
 		  const struct rte_eth_dev_info *sinfo)
 {
+	info->min_mtu = RTE_MAX(info->min_mtu, sinfo->min_mtu);
+	info->max_mtu = RTE_MIN(info->max_mtu, sinfo->max_mtu);
 	info->max_rx_pktlen = RTE_MIN(info->max_rx_pktlen, 

sinfo->max_rx_pktlen);
 	info->max_rx_queues = RTE_MIN(info->max_rx_queues, 
sinfo->max_rx_queues);
 	info->max_tx_queues = RTE_MIN(info->max_tx_queues, 
sinfo->max_tx_queues);

@@ -1172,6 +1174,8 @@ fs_dev_infos_get(struct rte_eth_dev *dev,
 	int ret;
 
 	/* Use maximum upper bounds by default */
+	infos->min_mtu = RTE_ETHER_MIN_MTU;
+	infos->max_mtu = UINT16_MAX;
 	infos->max_rx_pktlen = UINT32_MAX;
 	infos->max_rx_queues = RTE_MAX_QUEUES_PER_PORT;
 	infos->max_tx_queues = RTE_MAX_QUEUES_PER_PORT;

-- 
2.29.2