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Date:   Thu,  4 Aug 2022 10:36:04 -0700
From:   Florian Fainelli <>
Cc:     Florian Fainelli <>,
        Doug Berger <>,
        Broadcom internal kernel review list 
        "David S. Miller" <>,
        Eric Dumazet <>,
        Jakub Kicinski <>,
        Paolo Abeni <>,
        Heiner Kallweit <>, (open list)
Subject: [PATCH net] net: bcmgenet: Indicate MAC is in charge of PHY PM

Avoid the PHY library call unnecessarily into the suspend/resume functions by
setting phydev->mac_managed_pm to true. The GENET driver essentially does
exactly what mdio_bus_phy_resume() does by calling phy_init_hw() plus

Fixes: fba863b81604 ("net: phy: make PHY PM ops a no-op if MAC driver manages PHY PM")
Signed-off-by: Florian Fainelli <>
The commit ID used in the Fixes: tag is to ensure that this goes back to
when the support for mac_managed_pm was introduced, however in premise
this issue has existed for a while, so we might consider a targeted
backport all the way back to 4.9.

 drivers/net/ethernet/broadcom/genet/bcmmii.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/net/ethernet/broadcom/genet/bcmmii.c b/drivers/net/ethernet/broadcom/genet/bcmmii.c
index c888ddee1fc4..7ded559842e8 100644
--- a/drivers/net/ethernet/broadcom/genet/bcmmii.c
+++ b/drivers/net/ethernet/broadcom/genet/bcmmii.c
@@ -393,6 +393,9 @@ int bcmgenet_mii_probe(struct net_device *dev)
 	if (priv->internal_phy && !GENET_IS_V5(priv))
 		dev->phydev->irq = PHY_MAC_INTERRUPT;
+	/* Indicate that the MAC is responsible for PHY PM */
+	dev->phydev->mac_managed_pm = true;
 	return 0;

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