[dpdk-stable] [PATCH 18.11 2/3] net/avf: fix flow flush after PF reset

[Jeff Guo <jia.guo@intel.com>]

[ upstream commit c02ea7410e5124ad44ad7419ab16a43e1b3af647 ]

When VF begin reset after PF reset, VF will be uninitialized at first
and then be initialized, during the time any invalid cmd such as flow
flush should not be sent to PF until the uninitialization is finished.

Fixes: 3926cfffff2c ("net/avf: fix command after PF reset")

Signed-off-by: Jeff Guo <jia.guo@intel.com>
Acked-by: Qi Zhang <qi.z.zhang@intel.com>
---
 drivers/net/avf/avf_ethdev.c | 5 +++--
 drivers/net/avf/avf_vchnl.c  | 7 ++++---
 2 files changed, 7 insertions(+), 5 deletions(-)

diff --git a/drivers/net/avf/avf_ethdev.c b/drivers/net/avf/avf_ethdev.c
index 35a7debf64..d49de4344a 100644
--- a/drivers/net/avf/avf_ethdev.c
+++ b/drivers/net/avf/avf_ethdev.c
@@ -1137,8 +1137,6 @@ avf_init_vf(struct rte_eth_dev *dev)
 		}
 	}
 
-	vf->vf_reset = false;
-
 	return 0;
 err_rss:
 	rte_free(vf->rss_key);
@@ -1269,6 +1267,7 @@ avf_dev_init(struct rte_eth_dev *eth_dev)
 static void
 avf_dev_close(struct rte_eth_dev *dev)
 {
+	struct avf_info *vf = AVF_DEV_PRIVATE_TO_VF(dev->data->dev_private);
 	struct avf_hw *hw = AVF_DEV_PRIVATE_TO_HW(dev->data->dev_private);
 	struct rte_pci_device *pci_dev = RTE_ETH_DEV_TO_PCI(dev);
 	struct rte_intr_handle *intr_handle = &pci_dev->intr_handle;
@@ -1282,6 +1281,8 @@ avf_dev_close(struct rte_eth_dev *dev)
 	rte_intr_callback_unregister(intr_handle,
 				     avf_dev_interrupt_handler, dev);
 	avf_disable_irq0(hw);
+
+	vf->vf_reset = false;
 }
 
 static int
diff --git a/drivers/net/avf/avf_vchnl.c b/drivers/net/avf/avf_vchnl.c
index 29ef485184..39ae0c011c 100644
--- a/drivers/net/avf/avf_vchnl.c
+++ b/drivers/net/avf/avf_vchnl.c
@@ -73,12 +73,12 @@ avf_execute_vf_cmd(struct avf_adapter *adapter, struct avf_cmd_info *args)
 	int err = 0;
 	int i = 0;
 
-	if (_atomic_set_cmd(vf, args->ops))
-		return -1;
-
 	if (vf->vf_reset)
 		return -EIO;
 
+	if (_atomic_set_cmd(vf, args->ops))
+		return -1;
+
 	ret = avf_aq_send_msg_to_pf(hw, args->ops, AVF_SUCCESS,
 				    args->in_args, args->in_args_size, NULL);
 	if (ret) {
@@ -150,6 +150,7 @@ avf_handle_pf_event_msg(struct rte_eth_dev *dev, uint8_t *msg,
 	switch (pf_msg->event) {
 	case VIRTCHNL_EVENT_RESET_IMPENDING:
 		PMD_DRV_LOG(DEBUG, "VIRTCHNL_EVENT_RESET_IMPENDING event");
+		vf->vf_reset = true;
 		_rte_eth_dev_callback_process(dev, RTE_ETH_EVENT_INTR_RESET,
 					      NULL);
 		break;
-- 
2.20.1