From: Florian Fainelli <f.fainelli@gmail.com>
To: Paul Kocialkowski <paul.kocialkowski@bootlin.com>,
netdev@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org
Cc: Andrew Lunn <andrew@lunn.ch>,
Heiner Kallweit <hkallweit1@gmail.com>,
"David S . Miller" <davem@davemloft.net>,
Michal Simek <michal.simek@xilinx.com>,
Thomas Petazzoni <thomas.petazzoni@bootlin.com>
Subject: Re: [PATCH RESEND net] net: phy: xgmiitorgmii: Support generic PHY status read
Date: Fri, 15 Feb 2019 09:38:27 -0800 [thread overview]
Message-ID: <387ed483-b205-beda-319d-6f2b8ea55601@gmail.com> (raw)
In-Reply-To: <20190215163220.20041-1-paul.kocialkowski@bootlin.com>
On 2/15/19 8:32 AM, Paul Kocialkowski wrote:
> Some PHY drivers like the generic one do not provide a read_status
> callback on their own but rely on genphy_read_status being called
> directly.
>
> With the current code, this results in a NULL function pointer call.
> Call genphy_read_status instead when there is no specific callback.
>
> Fixes: f411a6160bd4 ("net: phy: Add gmiitorgmii converter support")
> Signed-off-by: Paul Kocialkowski <paul.kocialkowski@bootlin.com>
> ---
> Added Fixes tag and net label for resend.
You would want to use phy_read_status() which encapsulates that check as
well as checks that the phy_drv pointer is not NULL.
>
> drivers/net/phy/xilinx_gmii2rgmii.c | 5 ++++-
> 1 file changed, 4 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/net/phy/xilinx_gmii2rgmii.c b/drivers/net/phy/xilinx_gmii2rgmii.c
> index 74a8782313cf..bd6084e315de 100644
> --- a/drivers/net/phy/xilinx_gmii2rgmii.c
> +++ b/drivers/net/phy/xilinx_gmii2rgmii.c
> @@ -44,7 +44,10 @@ static int xgmiitorgmii_read_status(struct phy_device *phydev)
> u16 val = 0;
> int err;
>
> - err = priv->phy_drv->read_status(phydev);
> + if (priv->phy_drv->read_status)
> + err = priv->phy_drv->read_status(phydev);
> + else
> + err = genphy_read_status(phydev);
> if (err < 0)
> return err;
>
>
--
Florian
next prev parent reply other threads:[~2019-02-15 17:38 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-02-15 16:32 [PATCH RESEND net] net: phy: xgmiitorgmii: Support generic PHY status read Paul Kocialkowski
2019-02-15 17:02 ` Andrew Lunn
2019-02-15 17:38 ` Florian Fainelli [this message]
2019-02-15 18:34 ` Paul Kocialkowski
2019-02-15 18:53 ` Florian Fainelli
2019-02-19 9:56 ` Paul Kocialkowski
2019-02-19 17:25 ` Andrew Lunn
2019-02-20 6:58 ` Michal Simek
2019-02-21 10:24 ` Paul Kocialkowski
2019-02-21 11:03 ` Michal Simek
2019-02-27 8:43 ` Michal Simek
2019-02-27 9:05 ` Harini Katakam
2019-02-28 7:33 ` Harini Katakam
2019-03-09 12:09 ` Harini Katakam
2019-03-09 16:19 ` Andrew Lunn
2019-03-11 6:04 ` Harini Katakam
2019-03-11 12:27 ` Harini Katakam
2019-03-11 12:51 ` Michal Simek
2019-03-11 6:45 ` Michal Simek
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