[PATCH 2/2] net/iavf: fix crash on app exit on FreeBSD

[Bruce Richardson <bruce.richardson@intel.com>]

With the fallback interrupt path now enabled on FreeBSD there are
segmentation faults on app exit, due to the alarm interrupt trying to
access invalid pointers.  Add checks for null to fix these crashes.

Fixes: cd3b124955d4 ("net/iavf: enable interrupt polling")
Cc: stable@dpdk.org

Signed-off-by: Bruce Richardson <bruce.richardson@intel.com>
---
 drivers/net/intel/iavf/iavf_ethdev.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/net/intel/iavf/iavf_ethdev.c b/drivers/net/intel/iavf/iavf_ethdev.c
index 1ab84b0bfc..2335746f04 100644
--- a/drivers/net/intel/iavf/iavf_ethdev.c
+++ b/drivers/net/intel/iavf/iavf_ethdev.c
@@ -2698,6 +2698,9 @@ void
 iavf_dev_alarm_handler(void *param)
 {
 	struct rte_eth_dev *dev = (struct rte_eth_dev *)param;
+	if (dev == NULL || dev->data == NULL || dev->data->dev_private == NULL)
+		return;
+
 	struct iavf_hw *hw = IAVF_DEV_PRIVATE_TO_HW(dev->data->dev_private);
 	uint32_t icr0;
 
-- 
2.43.0