From: Florian Fainelli <f.fainelli@gmail.com>
To: Alexandre Belloni <alexandre.belloni@bootlin.com>,
Andrew Lunn <andrew@lunn.ch>
Cc: "David S . Miller" <davem@davemloft.net>,
Allan Nielsen <Allan.Nielsen@microsemi.com>,
Thomas Petazzoni <thomas.petazzoni@bootlin.com>,
netdev@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH] net: phy: allow scanning busses with missing phys
Date: Tue, 24 Apr 2018 18:09:15 -0700 [thread overview]
Message-ID: <855e8401-cded-8418-bb07-fa97fe0bb769@gmail.com> (raw)
In-Reply-To: <20180424160904.32457-1-alexandre.belloni@bootlin.com>
On 04/24/2018 09:09 AM, Alexandre Belloni wrote:
> Some MDIO busses will error out when trying to read a phy address with no
> phy present at that address. In that case, probing the bus will fail
> because __mdiobus_register() is scanning the bus for all possible phys
> addresses.
>
> In case MII_PHYSID1 returns -EIO or -ENODEV, consider there is no phy at
> this address and set the phy ID to 0xffffffff which is then properly
> handled in get_phy_device().
>
> Suggested-by: Andrew Lunn <andrew@lunn.ch>
> Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
--
Florian
next prev parent reply other threads:[~2018-04-25 1:09 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-04-24 16:09 [PATCH] net: phy: allow scanning busses with missing phys Alexandre Belloni
2018-04-24 16:37 ` Florian Fainelli
2018-04-24 18:01 ` Andrew Lunn
2018-04-25 1:08 ` Florian Fainelli
2018-04-24 18:09 ` Alexandre Belloni
2018-04-25 1:09 ` Florian Fainelli [this message]
2018-04-25 17:01 ` David Miller
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