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net: stmmac: dwmac1000: provide multicast filter fallback 

If we don't have a hardware multicast filter available then instead of
silently failing to listen for the requested ethernet broadcast
addresses fall back to receiving all multicast packets, in a similar
fashion to other drivers with no multicast filter.

Cc: stable@vger.kernel.org
Signed-off-by: Jonathan McDowell <noodles@earth.li>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Jonathan McDowell 2020-08-12 20:37:01 +01:00 committed by David S. Miller
parent 06a7a37be5
commit 592d751c1e
1 changed files with 3 additions and 0 deletions
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3
drivers/net/ethernet/stmicro/stmmac/dwmac1000_core.c
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@ -164,6 +164,9 @@ static void dwmac1000_set_filter(struct mac_device_info *hw,
value = GMAC_FRAME_FILTER_PR | GMAC_FRAME_FILTER_PCF;
} else if (dev->flags & IFF_ALLMULTI) {
value = GMAC_FRAME_FILTER_PM; /* pass all multi */
} else if (!netdev_mc_empty(dev) && (mcbitslog2 == 0)) {
/* Fall back to all multicast if we've no filter */
value = GMAC_FRAME_FILTER_PM;
} else if (!netdev_mc_empty(dev)) {
struct netdev_hw_addr *ha;