[dpdk-stable] patch 'net/e1000: fix LSC interrupt' has been queued to LTS release 16.11.3

[Yuanhan Liu <yliu@fridaylinux.org>]

Hi,

FYI, your patch has been queued to LTS release 16.11.3

Note it hasn't been pushed to http://dpdk.org/browse/dpdk-stable yet.
It will be pushed if I get no objections before 07/27/17. So please
shout if anyone has objections.

Thanks.

	--yliu

---
>From 379145b8b31c122cbf8507e111f57f897315ff95 Mon Sep 17 00:00:00 2001
From: Jingjing Wu <jingjing.wu@intel.com>
Date: Thu, 13 Jul 2017 17:43:23 +0800
Subject: [PATCH] net/e1000: fix LSC interrupt

[ upstream commit 5ed76cd749ae90206e3e58444c76faae6aa7deae ]

If LSC flag is changed to off at last device start, the
enable flag is not cleared in HW.
This patch fixes it.

Fixes: c3cd3de0ab50 ("igb: enable Rx queue interrupts for PF")

Signed-off-by: Jingjing Wu <jingjing.wu@intel.com>
Acked-by: Wenzhuo Lu <wenzhuo.lu@intel.com>
---
 drivers/net/e1000/igb_ethdev.c | 15 +++++++++++----
 1 file changed, 11 insertions(+), 4 deletions(-)

diff --git a/drivers/net/e1000/igb_ethdev.c b/drivers/net/e1000/igb_ethdev.c
index 0a94ecc..9cf619f 100644
--- a/drivers/net/e1000/igb_ethdev.c
+++ b/drivers/net/e1000/igb_ethdev.c
@@ -129,7 +129,7 @@ static int  eth_igb_flow_ctrl_get(struct rte_eth_dev *dev,
 				struct rte_eth_fc_conf *fc_conf);
 static int  eth_igb_flow_ctrl_set(struct rte_eth_dev *dev,
 				struct rte_eth_fc_conf *fc_conf);
-static int eth_igb_lsc_interrupt_setup(struct rte_eth_dev *dev);
+static int eth_igb_lsc_interrupt_setup(struct rte_eth_dev *dev, uint8_t on);
 static int eth_igb_rxq_interrupt_setup(struct rte_eth_dev *dev);
 static int eth_igb_interrupt_get_status(struct rte_eth_dev *dev);
 static int eth_igb_interrupt_action(struct rte_eth_dev *dev);
@@ -1381,7 +1381,9 @@ eth_igb_start(struct rte_eth_dev *dev)
 	if (rte_intr_allow_others(intr_handle)) {
 		/* check if lsc interrupt is enabled */
 		if (dev->data->dev_conf.intr_conf.lsc != 0)
-			eth_igb_lsc_interrupt_setup(dev);
+			eth_igb_lsc_interrupt_setup(dev, TRUE);
+		else
+			eth_igb_lsc_interrupt_setup(dev, FALSE);
 	} else {
 		rte_intr_callback_unregister(intr_handle,
 					     eth_igb_interrupt_handler,
@@ -2543,18 +2545,23 @@ eth_igb_vlan_offload_set(struct rte_eth_dev *dev, int mask)
  *
  * @param dev
  *  Pointer to struct rte_eth_dev.
+ * @param on
+ *  Enable or Disable
  *
  * @return
  *  - On success, zero.
  *  - On failure, a negative value.
  */
 static int
-eth_igb_lsc_interrupt_setup(struct rte_eth_dev *dev)
+eth_igb_lsc_interrupt_setup(struct rte_eth_dev *dev, uint8_t on)
 {
 	struct e1000_interrupt *intr =
 		E1000_DEV_PRIVATE_TO_INTR(dev->data->dev_private);
 
-	intr->mask |= E1000_ICR_LSC;
+	if (on)
+		intr->mask |= E1000_ICR_LSC;
+	else
+		intr->mask &= ~E1000_ICR_LSC;
 
 	return 0;
 }
-- 
2.7.4