This is a note to let you know that I've just added the patch titled net: phy: Do not perform software reset for Generic PHY to the 4.9-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-phy-do-not-perform-software-reset-for-generic-phy.patch and it can be found in the queue-4.9 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. >From 0878fff1f42c18e448ab5b8b4f6a3eb32365b5b6 Mon Sep 17 00:00:00 2001 From: Florian Fainelli <f.fainelli@xxxxxxxxx> Date: Sun, 5 Mar 2017 12:34:49 -0800 Subject: net: phy: Do not perform software reset for Generic PHY From: Florian Fainelli <f.fainelli@xxxxxxxxx> commit 0878fff1f42c18e448ab5b8b4f6a3eb32365b5b6 upstream. The Generic PHY driver is a catch-all PHY driver and it should preserve whatever prior initialization has been done by boot loader or firmware agents. For specific PHY device configuration it is expected that a specialized PHY driver would take over that role. Resetting the generic PHY was a bad idea that has lead to several complaints and downstream workarounds e.g: in OpenWrt/LEDE so restore the behavior prior to 87aa9f9c61ad ("net: phy: consolidate PHY reset in phy_init_hw()"). Reported-by: Felix Fietkau <nbd@xxxxxxxx> Fixes: 87aa9f9c61ad ("net: phy: consolidate PHY reset in phy_init_hw()") Signed-off-by: Florian Fainelli <f.fainelli@xxxxxxxxx> Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx> Signed-off-by: Amit Pundir <amit.pundir@xxxxxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- drivers/net/phy/phy_device.c | 2 +- include/linux/phy.h | 4 ++++ 2 files changed, 5 insertions(+), 1 deletion(-) --- a/drivers/net/phy/phy_device.c +++ b/drivers/net/phy/phy_device.c @@ -1792,7 +1792,7 @@ static struct phy_driver genphy_driver[] .phy_id = 0xffffffff, .phy_id_mask = 0xffffffff, .name = "Generic PHY", - .soft_reset = genphy_soft_reset, + .soft_reset = genphy_no_soft_reset, .config_init = genphy_config_init, .features = PHY_GBIT_FEATURES | SUPPORTED_MII | SUPPORTED_AUI | SUPPORTED_FIBRE | --- a/include/linux/phy.h +++ b/include/linux/phy.h @@ -799,6 +799,10 @@ int genphy_read_status(struct phy_device int genphy_suspend(struct phy_device *phydev); int genphy_resume(struct phy_device *phydev); int genphy_soft_reset(struct phy_device *phydev); +static inline int genphy_no_soft_reset(struct phy_device *phydev) +{ + return 0; +} void phy_driver_unregister(struct phy_driver *drv); void phy_drivers_unregister(struct phy_driver *drv, int n); int phy_driver_register(struct phy_driver *new_driver, struct module *owner); Patches currently in stable-queue which might be from f.fainelli@xxxxxxxxx are queue-4.9/net-phy-do-not-perform-software-reset-for-generic-phy.patch