[dpdk-dev] [PATCH] net/ixgbe: fix LSC interrupt issue

[Qi Zhang]

There is a bug in previous fix for lsc interrupt.
lsc interrupt is not disabled before delayed handler,
that cause the delayed handler be re-entered.

Fixes: 9b667210700e ("net/ixgbe: fix blocked interrupts")
Cc: stable at dpdk.org

Signed-off-by: Qi Zhang <qi.z.zhang at intel.com>
---
 drivers/net/ixgbe/ixgbe_ethdev.c | 11 ++++++-----
 1 file changed, 6 insertions(+), 5 deletions(-)

diff --git a/drivers/net/ixgbe/ixgbe_ethdev.c b/drivers/net/ixgbe/ixgbe_ethdev.c
index ec667d8..c680aab 100644
--- a/drivers/net/ixgbe/ixgbe_ethdev.c
+++ b/drivers/net/ixgbe/ixgbe_ethdev.c
@@ -4107,14 +4107,15 @@ ixgbe_dev_interrupt_action(struct rte_eth_dev *dev,
 			timeout = IXGBE_LINK_DOWN_CHECK_TIMEOUT;
 
 		ixgbe_dev_link_status_print(dev);
-		intr->mask_original = intr->mask;
-		/* only disable lsc interrupt */
-		intr->mask &= ~IXGBE_EIMS_LSC;
 		if (rte_eal_alarm_set(timeout * 1000,
 				      ixgbe_dev_interrupt_delayed_handler, (void *)dev) < 0)
 			PMD_DRV_LOG(ERR, "Error setting alarm");
-		else
-			intr->mask = intr->mask_original;
+		else {
+			/* remember orignal mask */
+			intr->mask_original = intr->mask;
+			/* only disable lsc interrupt */
+			intr->mask &= ~IXGBE_EIMS_LSC;
+		}
 	}
 
 	PMD_DRV_LOG(DEBUG, "enable intr immediately");
-- 
2.7.4