[dpdk-stable] patch 'net/ixgbe: fix setting MTU on stopped device' has been queued to LTS release 16.11.2

[Yuanhan Liu]

Hi,

FYI, your patch has been queued to LTS release 16.11.2

Note it hasn't been pushed to http://dpdk.org/browse/dpdk-stable
yet. It will be pushed if I get no objections before 05/13/17.
So please shout if anyone has objections.

Thanks.

	--yliu

---
>From 774c084d7d95db35645d3ce709d28dbef78f38d9 Mon Sep 17 00:00:00 2001
From: Jia Yu <jyu at vmware.com>
Date: Thu, 27 Apr 2017 23:11:31 -0700
Subject: [PATCH] net/ixgbe: fix setting MTU on stopped device

[ upstream commit 22d0e5aed3c22bd8b08d58cfd2ed261d5e45ae9c ]

There exists case that software sets mtu (i.e jumbo frame) of
ixgbe device when it's stopped. Before the fix, scattered_rx
is cleared during device stop, and setting jumbo frame mtu
after device stop will always fail as scattered_rx is 0.

Signed-off-by: Jia Yu <jyu at vmware.com>
Acked-by: Wenzhuo Lu <wenzhuo.lu at intel.com>
---
 drivers/net/ixgbe/ixgbe_ethdev.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/drivers/net/ixgbe/ixgbe_ethdev.c b/drivers/net/ixgbe/ixgbe_ethdev.c
index 0fdf010..d6686f6 100644
--- a/drivers/net/ixgbe/ixgbe_ethdev.c
+++ b/drivers/net/ixgbe/ixgbe_ethdev.c
@@ -4090,6 +4090,7 @@ ixgbe_dev_mtu_set(struct rte_eth_dev *dev, uint16_t mtu)
 	struct ixgbe_hw *hw;
 	struct rte_eth_dev_info dev_info;
 	uint32_t frame_size = mtu + ETHER_HDR_LEN + ETHER_CRC_LEN;
+	struct rte_eth_rxmode *rx_conf = &dev->data->dev_conf.rxmode;
 
 	ixgbe_dev_info_get(dev, &dev_info);
 
@@ -4100,7 +4101,7 @@ ixgbe_dev_mtu_set(struct rte_eth_dev *dev, uint16_t mtu)
 	/* refuse mtu that requires the support of scattered packets when this
 	 * feature has not been enabled before.
 	 */
-	if (!dev->data->scattered_rx &&
+	if (!rx_conf->enable_scatter &&
 	    (frame_size + 2 * IXGBE_VLAN_TAG_SIZE >
 	     dev->data->min_rx_buf_size - RTE_PKTMBUF_HEADROOM))
 		return -EINVAL;
@@ -5723,6 +5724,7 @@ ixgbevf_dev_set_mtu(struct rte_eth_dev *dev, uint16_t mtu)
 {
 	struct ixgbe_hw *hw;
 	uint32_t max_frame = mtu + ETHER_HDR_LEN + ETHER_CRC_LEN;
+	struct rte_eth_rxmode *rx_conf = &dev->data->dev_conf.rxmode;
 
 	hw = IXGBE_DEV_PRIVATE_TO_HW(dev->data->dev_private);
 
@@ -5732,7 +5734,7 @@ ixgbevf_dev_set_mtu(struct rte_eth_dev *dev, uint16_t mtu)
 	/* refuse mtu that requires the support of scattered packets when this
 	 * feature has not been enabled before.
 	 */
-	if (!dev->data->scattered_rx &&
+	if (!rx_conf->enable_scatter &&
 	    (max_frame + 2 * IXGBE_VLAN_TAG_SIZE >
 	     dev->data->min_rx_buf_size - RTE_PKTMBUF_HEADROOM))
 		return -EINVAL;
-- 
1.9.0