[PATCH] net/ice: fix ice dcf contrl thread crash

[Ke Zhang <ke1x.zhang@intel.com>]

The control thread accesses the hardware resources after the
resources were released, resulting in a segment error.

This commit fixes the bug by exiting thread before resource released.

Signed-off-by: Ke Zhang <ke1x.zhang@intel.com>
---
 drivers/net/ice/ice_dcf.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/net/ice/ice_dcf.c b/drivers/net/ice/ice_dcf.c
index 1c3d22ae0f..e58908caf5 100644
--- a/drivers/net/ice/ice_dcf.c
+++ b/drivers/net/ice/ice_dcf.c
@@ -543,6 +543,8 @@ ice_dcf_handle_vsi_update_event(struct ice_dcf_hw *hw)
 	ice_dcf_disable_irq0(hw);
 
 	for (;;) {
+		if (hw->vc_event_msg_cb == NULL)
+			pthread_exit(NULL);
 		if (ice_dcf_get_vf_resource(hw) == 0 &&
 		    ice_dcf_get_vf_vsi_map(hw) >= 0) {
 			err = 0;
@@ -760,6 +762,8 @@ ice_dcf_uninit_hw(struct rte_eth_dev *eth_dev, struct ice_dcf_hw *hw)
 	rte_intr_callback_unregister(intr_handle,
 				     ice_dcf_dev_interrupt_handler, hw);
 
+	hw->vc_event_msg_cb = NULL;
+
 	ice_dcf_mode_disable(hw);
 	iavf_shutdown_adminq(&hw->avf);
 
-- 
2.25.1