[dpdk-stable] patch 'net/nfp: fix jumbo settings' has been queued to LTS release 16.11.5

[luca.boccassi at gmail.com]

Hi,

FYI, your patch has been queued to LTS release 16.11.5

Note it hasn't been pushed to http://dpdk.org/browse/dpdk-stable yet.
It will be pushed if I get no objections before 01/28/18. So please
shout if anyone has objections.

Thanks.

Luca Boccassi

---
>From c8ac12fbb38b528437938b9522d8239032917deb Mon Sep 17 00:00:00 2001
From: Alejandro Lucero <alejandro.lucero at netronome.com>
Date: Fri, 24 Nov 2017 14:24:37 +0000
Subject: [PATCH] net/nfp: fix jumbo settings

[ upstream commit c70ccbc79d8a0b7327f98f6072da75a530c4102a ]

When jumbo frames is configured, the hardware mtu needs to be updated to
the specified max_rx_pkt_len. Also, changing mtu should be avoided once
the PMD port started.

Fixes: defb9a5dd156 ("nfp: introduce driver initialization")

Signed-off-by: Alejandro Lucero <alejandro.lucero at netronome.com>
---
 drivers/net/nfp/nfp_net.c | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/drivers/net/nfp/nfp_net.c b/drivers/net/nfp/nfp_net.c
index 052b07348..4c25e3e3c 100644
--- a/drivers/net/nfp/nfp_net.c
+++ b/drivers/net/nfp/nfp_net.c
@@ -517,7 +517,7 @@ nfp_net_configure(struct rte_eth_dev *dev)
 		new_ctrl |= NFP_NET_CFG_CTRL_TXVLAN;
 
 	if (rxmode->jumbo_frame)
-		/* this is handled in rte_eth_dev_configure */
+		hw->mtu = rxmode->max_rx_pkt_len;
 
 	if (rxmode->hw_strip_crc) {
 		PMD_INIT_LOG(INFO, "strip CRC not supported\n");
@@ -1240,6 +1240,13 @@ nfp_net_dev_mtu_set(struct rte_eth_dev *dev, uint16_t mtu)
 	if ((mtu < ETHER_MIN_MTU) || ((uint32_t)mtu > hw->max_mtu))
 		return -EINVAL;
 
+	/* mtu setting is forbidden if port is started */
+	if (dev->data->dev_started) {
+		PMD_DRV_LOG(ERR, "port %d must be stopped before configuration",
+			    dev->data->port_id);
+		return -EBUSY;
+	}
+
 	/* switch to jumbo mode if needed */
 	if ((uint32_t)mtu > ETHER_MAX_LEN)
 		dev->data->dev_conf.rxmode.jumbo_frame = 1;
-- 
2.14.2