This is a note to let you know that I've just added the patch titled
net: bcmgenet: Ensure MDIO unregistration has clocks enabled
to the 6.4-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-bcmgenet-ensure-mdio-unregistration-has-clocks-enabled.patch
and it can be found in the queue-6.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 1b5ea7ffb7a3bdfffb4b7f40ce0d20a3372ee405 Mon Sep 17 00:00:00 2001
From: Florian Fainelli <florian.fainelli@xxxxxxxxxxxx>
Date: Thu, 22 Jun 2023 03:31:07 -0700
Subject: net: bcmgenet: Ensure MDIO unregistration has clocks enabled
From: Florian Fainelli <florian.fainelli@xxxxxxxxxxxx>
commit 1b5ea7ffb7a3bdfffb4b7f40ce0d20a3372ee405 upstream.
With support for Ethernet PHY LEDs having been added, while
unregistering a MDIO bus and its child device liks PHYs there may be
"late" accesses to the MDIO bus. One typical use case is setting the PHY
LEDs brightness to OFF for instance.
We need to ensure that the MDIO bus controller remains entirely
functional since it runs off the main GENET adapter clock.
Cc: stable@xxxxxxxxxxxxxxx
Link: https://lore.kernel.org/all/20230617155500.4005881-1-andrew@xxxxxxx/
Fixes: 9a4e79697009 ("net: bcmgenet: utilize generic Broadcom UniMAC MDIO controller driver")
Signed-off-by: Florian Fainelli <florian.fainelli@xxxxxxxxxxxx>
Reviewed-by: Andrew Lunn <andrew@xxxxxxx>
Link: https://lore.kernel.org/r/20230622103107.1760280-1-florian.fainelli@xxxxxxxxxxxx
Signed-off-by: Jakub Kicinski <kuba@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/net/ethernet/broadcom/genet/bcmmii.c | 2 ++
1 file changed, 2 insertions(+)
--- a/drivers/net/ethernet/broadcom/genet/bcmmii.c
+++ b/drivers/net/ethernet/broadcom/genet/bcmmii.c
@@ -673,5 +673,7 @@ void bcmgenet_mii_exit(struct net_device
if (of_phy_is_fixed_link(dn))
of_phy_deregister_fixed_link(dn);
of_node_put(priv->phy_dn);
+ clk_prepare_enable(priv->clk);
platform_device_unregister(priv->mii_pdev);
+ clk_disable_unprepare(priv->clk);
}
Patches currently in stable-queue which might be from florian.fainelli@xxxxxxxxxxxx are
queue-6.4/net-bcmgenet-ensure-mdio-unregistration-has-clocks-enabled.patch
