[PATCH v2] net/iavf: fix duplicate reset done check with large VF

[Zhichao Zeng]

When starting with large vf, need to reset VF to request queues, the reset
process will execute VIRTCHNL commands to clean up resource.

VF reset done check and reset watchdog read the same global register,
resulting in the NIC not responding to the VIRTCHNL command.

This patch turns off the watchdog when request queues to avoid
the VIRTCHNL command timeout error when starting with large VF.

Fixes: af801b0374e3 ("net/iavf: add devargs to control watchdog")
Fixes: 7a93cd3575eb ("net/iavf: add VF reset check")
Signed-off-by: Zhichao Zeng <zhichaox.z...@intel.com>
---
 drivers/net/iavf/iavf_ethdev.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/net/iavf/iavf_ethdev.c b/drivers/net/iavf/iavf_ethdev.c
index 00b963128b..ac7154d720 100644
--- a/drivers/net/iavf/iavf_ethdev.c
+++ b/drivers/net/iavf/iavf_ethdev.c
@@ -577,6 +577,7 @@ iavf_queues_req_reset(struct rte_eth_dev *dev, uint16_t num)
        PMD_DRV_LOG(INFO, "change queue pairs from %u to %u",
                        vf->vsi_res->num_queue_pairs, num);
 
+       iavf_dev_watchdog_disable(ad);
        ret = iavf_dev_reset(dev);
        if (ret) {
                PMD_DRV_LOG(ERR, "vf reset failed");
-- 
2.34.1