From: Andrew Lunn <andrew@lunn.ch>
To: David Yang <mmyangfl@gmail.com>
Cc: netdev@vger.kernel.org, Vladimir Oltean <olteanv@gmail.com>,
"David S. Miller" <davem@davemloft.net>,
Eric Dumazet <edumazet@kernel.org>,
Jakub Kicinski <kuba@kernel.org>, Paolo Abeni <pabeni@redhat.com>,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH net v2] net: dsa: motorcomm: Isolate all ports during chip setup
Date: Mon, 26 Oct 2026 01:50:30 +0100 [thread overview]
Message-ID: <0fe75791-3a1d-4a33-968d-c5c5fb28f86b@lunn.ch> (raw)
In-Reply-To: <20261025144834.2810828-1-mmyangfl@gmail.com>
On Sun, Oct 25, 2026 at 10:48:31PM +0800, David Yang wrote:
> The chip setup only blocked unknown unicast and unknown multicast
> frames, known multicast and broadcast were left open (though the former
> cannot appear while the FDB is still empty). Before port_setup() runs,
> broadcast frames received on a port flood out of the other ports.
>
> Close the window by fully isolating every port right after the hardware
> reset.
>
> Fixes: 186623f4aa72 ("net: dsa: yt921x: Add support for Motorcomm YT921x")
> Signed-off-by: David Yang <mmyangfl@gmail.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Andrew
prev parent reply other threads:[~2026-10-26 0:50 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-10-25 14:48 David Yang
2026-10-25 14:51 ` netdev-bot+sinfo
2026-10-26 0:50 ` Andrew Lunn [this message]
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