[dpdk-dev] [PATCH v2 07/27] ethdev: support setting maximum packet length to less than 1518

[Helin Zhang <helin.zhang@intel.com>]

In ethdev, it ignores setting maximum packet length to less than
1518. The changes is to remove this limitation and let less than
1518 can be set for 'maximum packet length'.

Signed-off-by: Helin Zhang <helin.zhang@intel.com>
Signed-off-by: Jing Chen <jing.d.chen@intel.com>
Acked-by: Cunming Liang <cunming.liang@intel.com>
Acked-by: Jijiang Liu <jijiang.liu@intel.com>
Acked-by: Jingjing Wu <jingjing.wu@intel.com>
Tested-by: Waterman Cao <waterman.cao@intel.com>
---
 lib/librte_ether/rte_ethdev.c | 10 +++++++---
 1 file changed, 7 insertions(+), 3 deletions(-)

diff --git a/lib/librte_ether/rte_ethdev.c b/lib/librte_ether/rte_ethdev.c
index 53cb7a9..1791ed7 100644
--- a/lib/librte_ether/rte_ethdev.c
+++ b/lib/librte_ether/rte_ethdev.c
@@ -657,9 +657,13 @@ rte_eth_dev_configure(uint8_t port_id, uint16_t nb_rx_q, uint16_t nb_tx_q,
 				(unsigned)ETHER_MIN_LEN);
 			return (-EINVAL);
 		}
-	} else
-		/* Use default value */
-		dev->data->dev_conf.rxmode.max_rx_pkt_len = ETHER_MAX_LEN;
+	} else {
+		if (dev_conf->rxmode.max_rx_pkt_len < ETHER_MIN_LEN ||
+			dev_conf->rxmode.max_rx_pkt_len > ETHER_MAX_LEN)
+			/* Use default value */
+			dev->data->dev_conf.rxmode.max_rx_pkt_len =
+							ETHER_MAX_LEN;
+	}
 
 	/* multipe queue mode checking */
 	diag = rte_eth_dev_check_mq_mode(port_id, nb_rx_q, nb_tx_q, dev_conf);
-- 
1.8.1.4