blob: 7dd141d29041b5358e308c28f5ca3184ee4e4dd2 [file] [log] [blame]
From 9d4d3dae549a8a529640e695afe2037ab67517b1 Mon Sep 17 00:00:00 2001
From: Jonathan McDowell <>
Date: Wed, 12 Aug 2020 20:37:23 +0100
Subject: [PATCH] net: ethernet: stmmac: Disable hardware multicast filter
commit df43dd526e6609769ae513a81443c7aa727c8ca3 upstream.
The IPQ806x does not appear to have a functional multicast ethernet
address filter. This was observed as a failure to correctly receive IPv6
packets on a LAN to the all stations address. Checking the vendor driver
shows that it does not attempt to enable the multicast filter and
instead falls back to receiving all multicast packets, internally
setting ALLMULTI.
Use the new fallback support in the dwmac1000 driver to correctly
achieve the same with the mainline IPQ806x driver. Confirmed to fix IPv6
functionality on an RB3011 router.
Signed-off-by: Jonathan McDowell <>
Signed-off-by: David S. Miller <>
Signed-off-by: Paul Gortmaker <>
diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac-ipq806x.c b/drivers/net/ethernet/stmicro/stmmac/dwmac-ipq806x.c
index bc0e2fe71682..db3264d374f9 100644
--- a/drivers/net/ethernet/stmicro/stmmac/dwmac-ipq806x.c
+++ b/drivers/net/ethernet/stmicro/stmmac/dwmac-ipq806x.c
@@ -350,6 +350,7 @@ static int ipq806x_gmac_probe(struct platform_device *pdev)
plat_dat->has_gmac = true;
plat_dat->bsp_priv = gmac;
plat_dat->fix_mac_speed = ipq806x_gmac_fix_mac_speed;
+ plat_dat->multicast_filter_bins = 0;
err = stmmac_dvr_probe(&pdev->dev, plat_dat, &stmmac_res);
if (err)