[PATCH] net/netvsc: use rte_eth_dev_set_mtu to set VF MTU

[longli at linuxonhyperv.com]

From: Stephen Hemminger <stephen at networkplumber.org>

The current code uses unnecessary locking to set VF MTU, resulting in
deadlock on hot add/remove path. Fix this by using rte_eth_dev_set_mtu()
to set VF MTU.

Signed-off-by: Stephen Hemminger <stephen at networkplumber.org>

Fixes: 45c83603087e ("net/netvsc: support MTU set")
Cc: stable at dpdk.org
Signed-off-by: Long Li <longli at microsoft.com>
---
 drivers/net/netvsc/hn_vf.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/net/netvsc/hn_vf.c b/drivers/net/netvsc/hn_vf.c
index 6b3d0eb0c8..b664beaa5d 100644
--- a/drivers/net/netvsc/hn_vf.c
+++ b/drivers/net/netvsc/hn_vf.c
@@ -264,7 +264,7 @@ int hn_vf_add(struct rte_eth_dev *dev, struct hn_data *hv)
 			goto exit;
 		}
 
-		ret = hn_vf_mtu_set(dev, dev->data->mtu);
+		ret = rte_eth_dev_set_mtu(port, dev->data->mtu);
 		if (ret) {
 			PMD_DRV_LOG(ERR, "Failed to set VF MTU");
 			goto exit;
@@ -796,7 +796,7 @@ int hn_vf_mtu_set(struct rte_eth_dev *dev, uint16_t mtu)
 	rte_rwlock_read_lock(&hv->vf_lock);
 	vf_dev = hn_get_vf_dev(hv);
 	if (hv->vf_ctx.vf_vsc_switched && vf_dev)
-		ret = vf_dev->dev_ops->mtu_set(vf_dev, mtu);
+		ret = rte_eth_dev_set_mtu(vf_dev->data->port_id, mtu);
 	rte_rwlock_read_unlock(&hv->vf_lock);
 
 	return ret;
-- 
2.43.0