netdev - Re: [PATCH] net: phy: realtek: clear interrupt during init for rtl8211f

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Message-ID: <7735a257-21ff-e6c0-acdc-f5ee187b1f57@gmail.com>
Date:   Tue, 12 May 2020 20:43:40 +0200
From:   Heiner Kallweit <hkallweit1@...il.com>
To:     Jisheng Zhang <Jisheng.Zhang@...aptics.com>,
        Andrew Lunn <andrew@...n.ch>,
        Florian Fainelli <f.fainelli@...il.com>,
        Russell King <linux@...linux.org.uk>,
        "David S. Miller" <davem@...emloft.net>
Cc:     netdev@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] net: phy: realtek: clear interrupt during init for
 rtl8211f

On 12.05.2020 12:46, Jisheng Zhang wrote:
> The PHY Register Accessible Interrupt is enabled by default, so
> there's such an interrupt during init. In PHY POLL mode case, the
> INTB/PMEB pin is alway active, it is not good. Clear the interrupt by
> calling rtl8211f_ack_interrupt().

As you say "it's not good" w/o elaborating a little bit more on it:
Do you face any actual issue? Or do you just think that it's not nice?
I'm asking because you don't provide a Fixes tag and you don't
annotate your patch as net or net-next.
Once you provide more details we would also get an idea whether a
change would have to be made to phylib, because what you describe
doesn't seem to be specific to this one PHY model.

> 
> Signed-off-by: Jisheng Zhang <Jisheng.Zhang@...aptics.com>
> ---
>  drivers/net/phy/realtek.c | 4 ++++
>  1 file changed, 4 insertions(+)
> 
> diff --git a/drivers/net/phy/realtek.c b/drivers/net/phy/realtek.c
> index 2d99e9de6ee1..398607268a3c 100644
> --- a/drivers/net/phy/realtek.c
> +++ b/drivers/net/phy/realtek.c
> @@ -179,6 +179,10 @@ static int rtl8211f_config_init(struct phy_device *phydev)
>  	u16 val_txdly, val_rxdly;
>  	int ret;
>  
> +	ret = rtl8211f_ack_interrupt(phydev);
> +	if (ret < 0)
> +		return ret;
> +
>  	switch (phydev->interface) {
>  	case PHY_INTERFACE_MODE_RGMII:
>  		val_txdly = 0;
>