From: Derrick Pallas Date: Wed, 18 Feb 2015 08:50:25 +0000 (-0800) Subject: ethernet/ixp4xx: prevent allmulti from clobbering promisc X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=f81edc6ac1e1e2e2cbe98bcd6ef5ebb7afb00807;p=GitHub%2FLineageOS%2FG12%2Fandroid_kernel_amlogic_linux-4.9.git ethernet/ixp4xx: prevent allmulti from clobbering promisc If both promisc and allmulti are set, promisc should trump allmulti and disable the MAC filter; otherwise, the interface is not really promisc. Previously, this code checked IFF_ALLMULTI prior to and without regard for IFF_PROMISC; if both were set, only multicast and direct unicast traffic would make it through the filter. Signed-off-by: Derrick Pallas Signed-off-by: David S. Miller --- diff --git a/drivers/net/ethernet/xscale/ixp4xx_eth.c b/drivers/net/ethernet/xscale/ixp4xx_eth.c index f7e0f0f7c2e2..9e16a2819d48 100644 --- a/drivers/net/ethernet/xscale/ixp4xx_eth.c +++ b/drivers/net/ethernet/xscale/ixp4xx_eth.c @@ -938,7 +938,7 @@ static void eth_set_mcast_list(struct net_device *dev) int i; static const u8 allmulti[] = { 0x01, 0x00, 0x00, 0x00, 0x00, 0x00 }; - if (dev->flags & IFF_ALLMULTI) { + if ((dev->flags & IFF_ALLMULTI) && !(dev->flags & IFF_PROMISC)) { for (i = 0; i < ETH_ALEN; i++) { __raw_writel(allmulti[i], &port->regs->mcast_addr[i]); __raw_writel(allmulti[i], &port->regs->mcast_mask[i]);