[dpdk-dev] [PATCH v3] net/i40e: fix PF notify issue when VF is not up

[Xiaoyun Li <xiaoyun.li@intel.com>]

This patch stops PF from sending message to VF when VF's admin queue
isn't enabled, namely VF isn't up.

Fixes: 4861cde46116 ("i40e: new poll mode driver")
Cc: stable@dpdk.org

Signed-off-by: Xiaoyun Li <xiaoyun.li@intel.com>
---
v3:
* Modify the code to be more concise.
* Don't modify vf's state since it isn't used in this patch.

 drivers/net/i40e/i40e_pf.c | 14 ++++++++++++--
 1 file changed, 12 insertions(+), 2 deletions(-)

diff --git a/drivers/net/i40e/i40e_pf.c b/drivers/net/i40e/i40e_pf.c
index 100f8dc..fe89027 100644
--- a/drivers/net/i40e/i40e_pf.c
+++ b/drivers/net/i40e/i40e_pf.c
@@ -1192,7 +1192,10 @@ i40e_pf_host_process_cmd_cfg_pvid(struct i40e_pf_vf *vf,
 void
 i40e_notify_vf_link_status(struct rte_eth_dev *dev, struct i40e_pf_vf *vf)
 {
+	struct i40e_hw *hw = I40E_PF_TO_HW(vf->pf);
 	struct virtchnl_pf_event event;
+	uint16_t vf_id = vf->vf_idx;
+	uint32_t tval, rval;
 
 	event.event = VIRTCHNL_EVENT_LINK_CHANGE;
 	event.event_data.link_event.link_status =
@@ -1224,8 +1227,15 @@ i40e_notify_vf_link_status(struct rte_eth_dev *dev, struct i40e_pf_vf *vf)
 		break;
 	}
 
-	i40e_pf_host_send_msg_to_vf(vf, VIRTCHNL_OP_EVENT,
-		I40E_SUCCESS, (uint8_t *)&event, sizeof(event));
+	tval = I40E_READ_REG(hw, I40E_VF_ATQLEN(vf_id));
+	rval = I40E_READ_REG(hw, I40E_VF_ARQLEN(vf_id));
+
+	if (tval & I40E_VF_ATQLEN_ATQLEN_MASK ||
+	    tval & I40E_VF_ATQLEN_ATQENABLE_MASK ||
+	    rval & I40E_VF_ARQLEN_ARQLEN_MASK ||
+	    rval & I40E_VF_ARQLEN_ARQENABLE_MASK)
+		i40e_pf_host_send_msg_to_vf(vf, VIRTCHNL_OP_EVENT,
+			I40E_SUCCESS, (uint8_t *)&event, sizeof(event));
 }
 
 void
-- 
2.7.4