From: Julian Wiedmann <jwi@linux.ibm.com>
Subject: s390/qeth: advertise IFF_UNICAST_FLT
Patch-mainline: v4.17-rc1
Git-commit: d3aacac4e47477ce26fe474c216f90baadcb2604
References: FATE#326350, LTC#169511, bsc#1113509

Summary:     qeth: performance improvements
Description: This adds recent functional and performance improvements for the
             qeth network driver.
             Primarily this brings Scatter-Gather support for HiperSockets,
             reduced CPU consumption in the L3 IPv4 transmit path for OSA,
             improved Promiscuous Mode performance due to IFF_UNICAST_FLT,
             support for Scatter-Gather on z/VM virtual NICs, and
             support for delayed GRO flushing.

             For sanity & stability reasons, this effectively constitutes a
             backport of the qeth device driver from 4.19 mainline.
             

Upstream-Description:

             s390/qeth: advertise IFF_UNICAST_FLT

             qeth implements HW-based Unicast Filtering (via SETVMAC) on L2 devices.
             Tell the stack, so it knows that receiving traffic for secondary
             addresses doesn't require full-blown promiscuous mode.

             Signed-off-by: Julian Wiedmann <jwi@linux.vnet.ibm.com>
             Signed-off-by: David S. Miller <davem@davemloft.net>

Signed-off-by: Julian Wiedmann <jwi@linux.ibm.com>
Acked-by: Petr Tesarik <ptesarik@suse.com>
---
 drivers/s390/net/qeth_l2_main.c |    1 +
 1 file changed, 1 insertion(+)

--- a/drivers/s390/net/qeth_l2_main.c
+++ b/drivers/s390/net/qeth_l2_main.c
@@ -987,6 +987,7 @@ static int qeth_l2_setup_netdev(struct q
 		return -ENODEV;
 
 	card->dev->ml_priv = card;
+	card->dev->priv_flags |= IFF_UNICAST_FLT;
 	card->dev->watchdog_timeo = QETH_TX_TIMEOUT;
 	card->dev->mtu = card->info.initial_mtu;
 	card->dev->min_mtu = 64;