Commit 263a425a authored by Florian Fainelli's avatar Florian Fainelli Committed by David S. Miller
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net: systemport: Avoid RBUF stuck in Wake-on-LAN mode

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.

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: 83e82f4c

 ("net: systemport: add Wake-on-LAN support")
Signed-off-by: default avatarFlorian Fainelli <>
Signed-off-by: default avatarDavid S. Miller <>
parent 21b5f672
......@@ -2736,6 +2736,9 @@ static int __maybe_unused bcm_sysport_resume(struct device *d)
/* Disable the UniMAC RX/TX */
umac_enable_set(priv, CMD_RX_EN | CMD_TX_EN, 0);
/* We may have been suspended and never received a WOL event that
* would turn off MPD detection, take care of that now
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