ethdev: check that at least one FEC mode is specified

[ upstream commit 9fdcf2be070dcd5ea3d845ce798c298c5dfbaa4a ]

The behaviour is undefined in the rte_eth_fec_set() function
when the fec_capa parameter is equal to zero.
Add a check to handle this case.

Fixes: b7ccfb0 ("ethdev: introduce FEC API")

Signed-off-by: Denis Pryazhennikov <denis.pryazhennikov@arknetworks.am>
Acked-by: Ivan Malov <ivan.malov@arknetworks.am>
Acked-by: Viacheslav Galaktionov <viacheslav.galaktionov@arknetworks.am>
Acked-by: Ferruh Yigit <ferruh.yigit@amd.com>

lib/ethdev/rte_ethdev.c

@@ -4351,6 +4351,11 @@ rte_eth_fec_set(uint16_t port_id, uint32_t fec_capa)
 	RTE_ETH_VALID_PORTID_OR_ERR_RET(port_id, -ENODEV);
 	dev = &rte_eth_devices[port_id];
 
+	if (fec_capa == 0) {
+		RTE_ETHDEV_LOG(ERR, "At least one FEC mode should be specified\n");
+		return -EINVAL;
+	}
+
 	RTE_FUNC_PTR_OR_ERR_RET(*dev->dev_ops->fec_set, -ENOTSUP);
 	return eth_err(port_id, (*dev->dev_ops->fec_set)(dev, fec_capa));
 }