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Message-Id: <20220804173605.1266574-1-f.fainelli@gmail.com>
Date: Thu, 4 Aug 2022 10:36:04 -0700
From: Florian Fainelli <f.fainelli@...il.com>
To: netdev@...r.kernel.org
Cc: Florian Fainelli <f.fainelli@...il.com>,
Doug Berger <opendmb@...il.com>,
Broadcom internal kernel review list
<bcm-kernel-feedback-list@...adcom.com>,
"David S. Miller" <davem@...emloft.net>,
Eric Dumazet <edumazet@...gle.com>,
Jakub Kicinski <kuba@...nel.org>,
Paolo Abeni <pabeni@...hat.com>,
Heiner Kallweit <hkallweit1@...il.com>,
linux-kernel@...r.kernel.org (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
phy_resume().
Fixes: fba863b81604 ("net: phy: make PHY PM ops a no-op if MAC driver manages PHY PM")
Signed-off-by: Florian Fainelli <f.fainelli@...il.com>
---
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;
}
--
2.25.1
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