netdev - RE: [PATCH net-next 2/2] net: fec: remove workaround to restart state machine on MDIO error

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Message-ID: <VI1PR0402MB36008364E61ED82B821C8672FFBC0@VI1PR0402MB3600.eurprd04.prod.outlook.com>
Date:   Mon, 17 Dec 2018 02:05:00 +0000
From:   Andy Duan <fugang.duan@....com>
To:     Heiner Kallweit <hkallweit1@...il.com>,
        Andrew Lunn <andrew@...n.ch>,
        Florian Fainelli <f.fainelli@...il.com>,
        David Miller <davem@...emloft.net>
CC:     "netdev@...r.kernel.org" <netdev@...r.kernel.org>
Subject: RE: [PATCH net-next 2/2] net: fec: remove workaround to restart state
 machine on MDIO error

From: Heiner Kallweit <hkallweit1@...il.com> Sent: 2018年12月16日 0:20
> Now that the PHY isn't stopped any longer by phylib in case of a MDIO error,
> we can remove this workaround.
> 
> Signed-off-by: Heiner Kallweit <hkallweit1@...il.com>

The old workaround can be removed NOW,  thanks.

Acked-by: Fugang Duan <fugang.duan@....com>
> ---
>  drivers/net/ethernet/freescale/fec.h      |  1 -
>  drivers/net/ethernet/freescale/fec_main.c | 12 ------------
>  2 files changed, 13 deletions(-)
> 
> diff --git a/drivers/net/ethernet/freescale/fec.h
> b/drivers/net/ethernet/freescale/fec.h
> index bf80855dd..f79e57f73 100644
> --- a/drivers/net/ethernet/freescale/fec.h
> +++ b/drivers/net/ethernet/freescale/fec.h
> @@ -531,7 +531,6 @@ struct fec_enet_private {
> 
>  	/* Phylib and MDIO interface */
>  	struct	mii_bus *mii_bus;
> -	int	mii_timeout;
>  	uint	phy_speed;
>  	phy_interface_t	phy_interface;
>  	struct device_node *phy_node;
> diff --git a/drivers/net/ethernet/freescale/fec_main.c
> b/drivers/net/ethernet/freescale/fec_main.c
> index 6db69ba30..ae0f88bce 100644
> --- a/drivers/net/ethernet/freescale/fec_main.c
> +++ b/drivers/net/ethernet/freescale/fec_main.c
> @@ -1714,12 +1714,6 @@ static void fec_enet_adjust_link(struct net_device
> *ndev)
>  	struct phy_device *phy_dev = ndev->phydev;
>  	int status_change = 0;
> 
> -	/* Prevent a state halted on mii error */
> -	if (fep->mii_timeout && phy_dev->state == PHY_HALTED) {
> -		phy_dev->state = PHY_RESUMING;
> -		return;
> -	}
> -
>  	/*
>  	 * If the netdev is down, or is going down, we're not interested
>  	 * in link state events, so just mark our idea of the link as down @@
> -1779,7 +1773,6 @@ static int fec_enet_mdio_read(struct mii_bus *bus, int
> mii_id, int regnum)
>  	if (ret < 0)
>  		return ret;
> 
> -	fep->mii_timeout = 0;
>  	reinit_completion(&fep->mdio_done);
> 
>  	/* start a read op */
> @@ -1791,7 +1784,6 @@ static int fec_enet_mdio_read(struct mii_bus *bus,
> int mii_id, int regnum)
>  	time_left = wait_for_completion_timeout(&fep->mdio_done,
>  			usecs_to_jiffies(FEC_MII_TIMEOUT));
>  	if (time_left == 0) {
> -		fep->mii_timeout = 1;
>  		netdev_err(fep->netdev, "MDIO read timeout\n");
>  		ret = -ETIMEDOUT;
>  		goto out;
> @@ -1820,7 +1812,6 @@ static int fec_enet_mdio_write(struct mii_bus *bus,
> int mii_id, int regnum,
>  	else
>  		ret = 0;
> 
> -	fep->mii_timeout = 0;
>  	reinit_completion(&fep->mdio_done);
> 
>  	/* start a write op */
> @@ -1833,7 +1824,6 @@ static int fec_enet_mdio_write(struct mii_bus *bus,
> int mii_id, int regnum,
>  	time_left = wait_for_completion_timeout(&fep->mdio_done,
>  			usecs_to_jiffies(FEC_MII_TIMEOUT));
>  	if (time_left == 0) {
> -		fep->mii_timeout = 1;
>  		netdev_err(fep->netdev, "MDIO write timeout\n");
>  		ret  = -ETIMEDOUT;
>  	}
> @@ -2001,8 +1991,6 @@ static int fec_enet_mii_init(struct platform_device
> *pdev)
>  		return -ENOENT;
>  	}
> 
> -	fep->mii_timeout = 0;
> -
>  	/*
>  	 * Set MII speed to 2.5 MHz (= clk_get_rate() / 2 * phy_speed)
>  	 *
> --
> 2.20.0
>