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Date:   Thu, 06 Feb 2020 14:29:54 +0100 (CET)
From:   David Miller <>
Subject: Re: [PATCH net] net: systemport: Avoid RBUF stuck in Wake-on-LAN

From: Florian Fainelli <>
Date: Wed,  5 Feb 2020 12:32:04 -0800

> After a number of suspend and resume cycles, it is possible for the RBUF
> to be stuck in Wake-on-LAN mode, despite the MPD enable bit being
> cleared which instructed the RBUF to exit that mode.

Must be some weird state latching or something like that...

> Avoid creating that problematic condition by clearing the RX_EN and
> TX_EN bits in the UniMAC prior to disable the Magic Packet Detector
> logic which is guaranteed to make the RBUF exit Wake-on-LAN mode.
> Fixes: 83e82f4c706b ("net: systemport: add Wake-on-LAN support")
> Signed-off-by: Florian Fainelli <>

Applied and queued up for -stable, thanks.

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