From: "Verma, Aashish" aashishx.verma@intel.com
[ Upstream commit 2ba31cd93784b61813226d259fd94a221ecd9d61 ]
Without checking for IFF_MULTICAST flag, it is wrong to assume multicast filtering is always enabled. By checking against IFF_MULTICAST, now the driver behaves correctly when the multicast support is toggled by below command:- ip link set <devname> multicast off|on
Fixes: 477286b53f55 ("stmmac: add GMAC4 core support") Signed-off-by: Verma, Aashish aashishx.verma@intel.com Tested-by: Tan, Tee Min tee.min.tan@intel.com Signed-off-by: Ong Boon Leong boon.leong.ong@intel.com Signed-off-by: David S. Miller davem@davemloft.net Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/net/ethernet/stmicro/stmmac/dwmac4_core.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
--- a/drivers/net/ethernet/stmicro/stmmac/dwmac4_core.c +++ b/drivers/net/ethernet/stmicro/stmmac/dwmac4_core.c @@ -420,7 +420,7 @@ static void dwmac4_set_filter(struct mac value |= GMAC_PACKET_FILTER_PM; /* Set all the bits of the HASH tab */ memset(mc_filter, 0xff, sizeof(mc_filter)); - } else if (!netdev_mc_empty(dev)) { + } else if (!netdev_mc_empty(dev) && (dev->flags & IFF_MULTICAST)) { struct netdev_hw_addr *ha;
/* Hash filter for multicast */