[PATCH 4.16 008/279] ibmvnic: Do not notify peers on parameter change resets

[Greg Kroah-Hartman]

4.16-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Nathan Fontenot <nfont@xxxxxxxxxxxxxxxxxx>

[ Upstream commit ebc701b796a67a5785399dcbc83d90e3b5f1e02f ]

When attempting to change the driver parameters, such as the MTU
value or number of queues, do not call netdev_notify_peers().
Doing so will deadlock on the rtnl_lock.

Signed-off-by: Nathan Fontenot <nfont@xxxxxxxxxxxxxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
Signed-off-by: Sasha Levin <alexander.levin@xxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
 drivers/net/ethernet/ibm/ibmvnic.c |    3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

--- a/drivers/net/ethernet/ibm/ibmvnic.c
+++ b/drivers/net/ethernet/ibm/ibmvnic.c
@@ -1711,7 +1711,8 @@ static int do_reset(struct ibmvnic_adapt
 	for (i = 0; i < adapter->req_rx_queues; i++)
 		napi_schedule(&adapter->napi[i]);
 
-	if (adapter->reset_reason != VNIC_RESET_FAILOVER)
+	if (adapter->reset_reason != VNIC_RESET_FAILOVER &&
+	    adapter->reset_reason != VNIC_RESET_CHANGE_PARAM)
 		netdev_notify_peers(netdev);
 
 	netif_carrier_on(netdev);