[dpdk-stable] [PATCH 17.11 2/2] net/ixgbe: stop link setup alarm handler before device start

[Ilya Maximets <i.maximets@samsung.com>]

[ backported from upstream commit 916193dda6fb400114c0ffc5615e74ca13d50720 ]

We should stop alarm handler before resetting the HW to
avoid concurrent device reconfiguration.

Fixes: 0408f47ba4d6 ("net/ixgbe: fix busy polling while fiber link update")
CC: stable@dpdk.org

Signed-off-by: Ilya Maximets <i.maximets@samsung.com>
Tested-by: Anatoly Burakov <anatoly.burakov@intel.com>
Acked-by: Qi Zhang <qi.z.zhang@intel.com>
---
 drivers/net/ixgbe/ixgbe_ethdev.c | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

diff --git a/drivers/net/ixgbe/ixgbe_ethdev.c b/drivers/net/ixgbe/ixgbe_ethdev.c
index be836beeb..f047db83c 100644
--- a/drivers/net/ixgbe/ixgbe_ethdev.c
+++ b/drivers/net/ixgbe/ixgbe_ethdev.c
@@ -2533,6 +2533,9 @@ ixgbe_dev_start(struct rte_eth_dev *dev)
 		return -EINVAL;
 	}
 
+	/* Stop the link setup handler before resetting the HW. */
+	rte_eal_alarm_cancel(ixgbe_dev_setup_link_alarm_handler, dev);
+
 	/* disable uio/vfio intr/eventfd mapping */
 	rte_intr_disable(intr_handle);
 
@@ -2734,6 +2737,12 @@ ixgbe_dev_start(struct rte_eth_dev *dev)
 			    "please call hierarchy_commit() "
 			    "before starting the port");
 
+	/*
+	 * Update link status right before return, because it may
+	 * start link configuration process in a separate thread.
+	 */
+	ixgbe_dev_link_update(dev, 0);
+
 	return 0;
 
 error:
@@ -5042,6 +5051,9 @@ ixgbevf_dev_start(struct rte_eth_dev *dev)
 
 	PMD_INIT_FUNC_TRACE();
 
+	/* Stop the link setup handler before resetting the HW. */
+	rte_eal_alarm_cancel(ixgbe_dev_setup_link_alarm_handler, dev);
+
 	err = hw->mac.ops.reset_hw(hw);
 	if (err) {
 		PMD_INIT_LOG(ERR, "Unable to reset vf hardware (%d)", err);
@@ -5114,6 +5126,12 @@ ixgbevf_dev_start(struct rte_eth_dev *dev)
 	/* Re-enable interrupt for VF */
 	ixgbevf_intr_enable(hw);
 
+	/*
+	 * Update link status right before return, because it may
+	 * start link configuration process in a separate thread.
+	 */
+	ixgbevf_dev_link_update(dev, 0);
+
 	return 0;
 }
 
-- 
2.17.1