[Intel-wired-lan] [PATCH net-next] ice: Clear synchronized addrs when adding VFs in switchdev mode

[Penigalapati, Sandeep]

>-----Original Message-----
>From: Intel-wired-lan <intel-wired-lan-bounces at osuosl.org> On Behalf Of
>Marcin Szycik
>Sent: Tuesday, October 26, 2021 9:16 PM
>To: intel-wired-lan at lists.osuosl.org
>Subject: [Intel-wired-lan] [PATCH net-next] ice: Clear synchronized addrs when
>adding VFs in switchdev mode
>
>When spawning VFs in switchdev mode, internal filter list of vsi 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 at linux.intel.com>
>---
> drivers/net/ethernet/intel/ice/ice_eswitch.c | 6 ++++++
> 1 file changed, 6 insertions(+)
>
Tested-by: Sandeep Penigalapati <sandeep.penigalapati at intel.com>