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net: ethernet: stmmac: Disable hardware multicast filter

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commit df43dd526e 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.

Cc: stable@vger.kernel.org
Signed-off-by: Jonathan McDowell <noodles@earth.li>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Jonathan McDowell
2020-08-12 20:37:23 +01:00
committed by Chris
parent 03221f5490
commit 678cd81863
1 changed files with 1 additions and 0 deletions
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drivers/net/ethernet/stmicro/stmmac/dwmac-ipq806x.c
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@@ -362,6 +362,7 @@ 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)