From: Marcin Szycik <marcin.szycik@linux.intel.com>
Date: Tue, 26 Oct 2021 17:46:28 +0200
Subject: ice: Clear synchronized addrs when adding VFs in switchdev mode
Patch-mainline: v5.16-rc1
Git-commit: c79bb28e19cca322b70a912ec17dd6482d24c7e9
References: jsc#SLE-18375

When spawning VFs in switchdev mode, internal filter list of VSIs is
cleared, which includes MAC rules. However MAC entries stay on netdev's
multicast list, which causes error message when bringing link up after
spawning VFs ("Failed to delete MAC filters"). __dev_mc_sync() is
called and tries to unsync addresses that were already removed
internally when adding VFs.

This can be reproduced with:
1) Load ice driver
2) Change PF to switchdev mode
3) Bring PF link up
4) Bring PF link down
5) Create a VF on PF
6) Bring PF link up

Added clearing of netdev's multicast (and also unicast) list when
spawning VFs in switchdev mode, so the state of internal rule list and
netdev's MAC list is consistent.

Fixes: 1a1c40df2e80 ("ice: set and release switchdev environment")
Signed-off-by: Marcin Szycik <marcin.szycik@linux.intel.com>
Tested-by: Sandeep Penigalapati <sandeep.penigalapati@intel.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>
Acked-by: Thomas Bogendoerfer <tbogendoerfer@suse.de>
---
 drivers/net/ethernet/intel/ice/ice_eswitch.c |    6 ++++++
 1 file changed, 6 insertions(+)

--- a/drivers/net/ethernet/intel/ice/ice_eswitch.c
+++ b/drivers/net/ethernet/intel/ice/ice_eswitch.c
@@ -19,6 +19,7 @@
 static int ice_eswitch_setup_env(struct ice_pf *pf)
 {
 	struct ice_vsi *uplink_vsi = pf->switchdev.uplink_vsi;
+	struct net_device *uplink_netdev = uplink_vsi->netdev;
 	struct ice_vsi *ctrl_vsi = pf->switchdev.control_vsi;
 	struct ice_port_info *pi = pf->hw.port_info;
 	bool rule_added = false;
@@ -27,6 +28,11 @@ static int ice_eswitch_setup_env(struct
 
 	ice_remove_vsi_fltr(&pf->hw, uplink_vsi->idx);
 
+	netif_addr_lock_bh(uplink_netdev);
+	__dev_uc_unsync(uplink_netdev, NULL);
+	__dev_mc_unsync(uplink_netdev, NULL);
+	netif_addr_unlock_bh(uplink_netdev);
+
 	if (ice_vsi_add_vlan(uplink_vsi, 0, ICE_FWD_TO_VSI))
 		goto err_def_rx;