linux-kernel - Re: [PATCH 06/12] staging: dpaa2-ethsw: add ACL entry to redirect STP to CPU

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Date:   Tue, 5 Nov 2019 15:22:02 +0100
From:   Andrew Lunn <andrew@...n.ch>
To:     Ioana Ciornei <ioana.ciornei@....com>
Cc:     gregkh@...uxfoundation.org, linux-kernel@...r.kernel.org,
        f.fainelli@...il.com
Subject: Re: [PATCH 06/12] staging: dpaa2-ethsw: add ACL entry to redirect
 STP to CPU

> +static int ethsw_port_set_ctrl_if_acl(struct ethsw_port_priv *port_priv)
> +{
> +	const char stp_mac[ETH_ALEN] = {0x01, 0x80, 0xC2, 0x00, 0x00, 0x00};

I think there is a standard define for that somewhere in include/linux
or maybe include/net.

But thinking about the big picture, i wonder why this is needed, at
least in a minimal implementation. Bit 0 is set in this MAC address,
so it is a L2 multicast frame. By default, all L2 multicast frames
should be delivered to the CPU. So it should work without this.

       Andrew