[dpdk-dev] [PATCH 1/3] net/ixgbe: fix lsc interrupt

[Jingjing Wu]

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

Fixes: 0eb609239efd ("ixgbe: enable Rx queue interrupts for PF and VF")
Cc: stable at dpdk.org

Signed-off-by: Jingjing Wu <jingjing.wu at intel.com>
---
 drivers/net/ixgbe/ixgbe_ethdev.c | 15 +++++++++++----
 1 file changed, 11 insertions(+), 4 deletions(-)

diff --git a/drivers/net/ixgbe/ixgbe_ethdev.c b/drivers/net/ixgbe/ixgbe_ethdev.c
index c54d325..7ceeea8 100644
--- a/drivers/net/ixgbe/ixgbe_ethdev.c
+++ b/drivers/net/ixgbe/ixgbe_ethdev.c
@@ -240,7 +240,7 @@ static int ixgbe_dev_rss_reta_query(struct rte_eth_dev *dev,
 			struct rte_eth_rss_reta_entry64 *reta_conf,
 			uint16_t reta_size);
 static void ixgbe_dev_link_status_print(struct rte_eth_dev *dev);
-static int ixgbe_dev_lsc_interrupt_setup(struct rte_eth_dev *dev);
+static int ixgbe_dev_lsc_interrupt_setup(struct rte_eth_dev *dev, uint8_t on);
 static int ixgbe_dev_macsec_interrupt_setup(struct rte_eth_dev *dev);
 static int ixgbe_dev_rxq_interrupt_setup(struct rte_eth_dev *dev);
 static int ixgbe_dev_interrupt_get_status(struct rte_eth_dev *dev);
@@ -2669,7 +2669,9 @@ ixgbe_dev_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)
-			ixgbe_dev_lsc_interrupt_setup(dev);
+			ixgbe_dev_lsc_interrupt_setup(dev, TRUE);
+		else
+			ixgbe_dev_lsc_interrupt_setup(dev, FALSE);
 		ixgbe_dev_macsec_interrupt_setup(dev);
 	} else {
 		rte_intr_callback_unregister(intr_handle,
@@ -4052,19 +4054,24 @@ ixgbe_dev_allmulticast_disable(struct rte_eth_dev *dev)
  *
  * @param dev
  *  Pointer to struct rte_eth_dev.
+ * @param on
+ *  Enable or Disable.
  *
  * @return
  *  - On success, zero.
  *  - On failure, a negative value.
  */
 static int
-ixgbe_dev_lsc_interrupt_setup(struct rte_eth_dev *dev)
+ixgbe_dev_lsc_interrupt_setup(struct rte_eth_dev *dev, uint8_t on)
 {
 	struct ixgbe_interrupt *intr =
 		IXGBE_DEV_PRIVATE_TO_INTR(dev->data->dev_private);
 
 	ixgbe_dev_link_status_print(dev);
-	intr->mask |= IXGBE_EICR_LSC;
+	if (on)
+		intr->mask |= IXGBE_EICR_LSC;
+	else
+		intr->mask &= ~IXGBE_EICR_LSC;
 
 	return 0;
 }
-- 
2.4.11