This is a note to let you know that I've just added the patch titled
net: smsc911x: Stop and start PHY during suspend and resume
to the 5.15-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
net-smsc911x-stop-and-start-phy-during-suspend-and-r.patch
and it can be found in the queue-5.15 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 0f61d12fddc9b60884591c74f9f7700205a3b18b
Author: Florian Fainelli <f.fainelli@xxxxxxxxx>
Date: Wed Aug 24 19:39:51 2022 -0700
net: smsc911x: Stop and start PHY during suspend and resume
[ Upstream commit 3ce9f2bef75528936c78a7053301f5725f622f3a ]
Commit 744d23c71af3 ("net: phy: Warn about incorrect
mdio_bus_phy_resume() state") unveiled that the smsc911x driver was not
properly stopping and restarting the PHY during suspend/resume. Correct
that by indicating that the MAC is in charge of PHY PM operations and
ensure that all MDIO bus activity is quiescent during suspend.
Tested-by: Geert Uytterhoeven <geert+renesas@xxxxxxxxx>
Tested-by: Marek Szyprowski <m.szyprowski@xxxxxxxxxxx>
Fixes: fba863b81604 ("net: phy: make PHY PM ops a no-op if MAC driver manages PHY PM")
Fixes: 2aa70f864955 ("net: smsc911x: Quieten netif during suspend")
Signed-off-by: Florian Fainelli <f.fainelli@xxxxxxxxx>
Link: https://lore.kernel.org/r/20220825023951.3220-1-f.fainelli@xxxxxxxxx
Signed-off-by: Jakub Kicinski <kuba@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/net/ethernet/smsc/smsc911x.c b/drivers/net/ethernet/smsc/smsc911x.c
index 592e191adbf7d..63b99dd8ca51c 100644
--- a/drivers/net/ethernet/smsc/smsc911x.c
+++ b/drivers/net/ethernet/smsc/smsc911x.c
@@ -1037,6 +1037,8 @@ static int smsc911x_mii_probe(struct net_device *dev)
return ret;
}
+ /* Indicate that the MAC is responsible for managing PHY PM */
+ phydev->mac_managed_pm = true;
phy_attached_info(phydev);
phy_set_max_speed(phydev, SPEED_100);
@@ -2584,6 +2586,8 @@ static int smsc911x_suspend(struct device *dev)
if (netif_running(ndev)) {
netif_stop_queue(ndev);
netif_device_detach(ndev);
+ if (!device_may_wakeup(dev))
+ phy_stop(ndev->phydev);
}
/* enable wake on LAN, energy detection and the external PME
@@ -2625,6 +2629,8 @@ static int smsc911x_resume(struct device *dev)
if (netif_running(ndev)) {
netif_device_attach(ndev);
netif_start_queue(ndev);
+ if (!device_may_wakeup(dev))
+ phy_start(ndev->phydev);
}
return 0;
