From: Andrew Lunn <andrew@lunn.ch>
To: Marek Vasut <marex@denx.de>
Cc: netdev@vger.kernel.org, "David S . Miller" <davem@davemloft.net>,
Nisar Sayed <Nisar.Sayed@microchip.com>,
Woojung Huh <Woojung.Huh@microchip.com>,
Florian Fainelli <f.fainelli@gmail.com>,
linux-usb@vger.kernel.org
Subject: Re: [PATCH 09/19] usbnet: smsc95xx: Connect to phydev
Date: Thu, 3 Jan 2019 14:22:50 +0100 [thread overview]
Message-ID: <20190103132250.GA21849@lunn.ch> (raw)
In-Reply-To: <20190103011040.25974-10-marex@denx.de>
On Thu, Jan 03, 2019 at 02:10:30AM +0100, Marek Vasut wrote:
> Add code to detect and connect to PHY. The internal PHY of the SMSC95xx
> is a regular SMSC LAN8700 and the driver only supports the internal PHY,
> so just use the SMSC PHY driver to configure the PHY. Note that the
> driver does a lot of extra configuration of the PHY, which is left in
> to avoid breakage. Some of the extra configuration is sorted out by
> later patches in this series.
Hi Marek
A MAC driver is not expected to touch the PHY at all. Please try to
remove as much of the extra configuration as possible, adding it to
the LAN8700 PHY driver as needed.
You also have to be careful of locking. phylib takes the phydev lock
when calling into the PHY driver. Anything the MAC does to the PHY is
not going to be done with this lock held. So bad things can happen.
Andrew
next prev parent reply other threads:[~2019-01-03 13:22 UTC|newest]
Thread overview: 33+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-01-03 1:10 [PATCH 00/19] usbnet: smsc95xx: Convert to phydev Marek Vasut
2019-01-03 1:10 ` [PATCH 01/19] usbnet: smsc95xx: Fix memory leak in smsc95xx_bind Marek Vasut
2019-01-03 1:10 ` [PATCH 02/19] usbnet: smsc95xx: Stop propagation of in_pm Marek Vasut
2019-01-07 11:02 ` Oliver Neukum
2019-01-07 11:50 ` Marek Vasut
2019-01-03 1:10 ` [PATCH 03/19] usbnet: smsc95xx: Remove smsc95xx_{read,write}_reg_nopm() Marek Vasut
2019-01-03 1:10 ` [PATCH 04/19] usbnet: smsc95xx: Remove __smsc95xx_{read,write}_reg() Marek Vasut
2019-01-03 1:10 ` [PATCH 05/19] usbnet: smsc95xx: Remove smsc95xx_{read,write}_nopm() Marek Vasut
2019-01-03 1:10 ` [PATCH 06/19] usbnet: smsc95xx: Remove __smsc95xx_mdio_{read,write}() Marek Vasut
2019-01-03 1:10 ` [PATCH 07/19] usbnet: smsc95xx: Split the reset function Marek Vasut
2019-01-07 11:05 ` Oliver Neukum
2019-01-03 1:10 ` [PATCH 08/19] usbnet: smsc95xx: Register MII bus Marek Vasut
2019-01-03 1:10 ` [PATCH 09/19] usbnet: smsc95xx: Connect to phydev Marek Vasut
2019-01-03 13:22 ` Andrew Lunn [this message]
2019-01-04 2:18 ` Marek Vasut
2019-01-03 1:10 ` [PATCH 10/19] usbnet: smsc95xx: Replace smsc95xx_mdio_read() with phy_read() Marek Vasut
2019-01-03 13:39 ` Andrew Lunn
2019-01-04 2:19 ` Marek Vasut
2019-01-04 13:24 ` Andrew Lunn
2019-01-04 14:58 ` Marek Vasut
2019-01-04 15:57 ` Andrew Lunn
2019-01-04 18:02 ` Heiner Kallweit
2019-01-03 1:10 ` [PATCH 11/19] usbnet: smsc95xx: Replace smsc95xx_mdio_write() with phy_write() Marek Vasut
2019-01-03 1:10 ` [PATCH 12/19] usbnet: smsc95xx: Replace ad-hoc PHY functions with generic ones Marek Vasut
2019-01-03 13:28 ` Andrew Lunn
2019-01-04 2:19 ` Marek Vasut
2019-01-03 1:10 ` [PATCH 13/19] usbnet: smsc95xx: Replace smsc95xx_link_ok_nopm() Marek Vasut
2019-01-03 1:10 ` [PATCH 14/19] usbnet: smsc95xx: Replace mii_nway_restart() Marek Vasut
2019-01-03 1:10 ` [PATCH 15/19] usbnet: smsc95xx: Replace mii_ethtool_gset() Marek Vasut
2019-01-03 1:10 ` [PATCH 16/19] usbnet: smsc95xx: Replace mii_check_media() Marek Vasut
2019-01-03 1:10 ` [PATCH 17/19] usbnet: smsc95xx: Replace generic_mii_ioctl() Marek Vasut
2019-01-03 1:10 ` [PATCH 18/19] usbnet: smsc95xx: Remove all of the carrier checking code Marek Vasut
2019-01-03 1:10 ` [PATCH 19/19] usbnet: smsc95xx: Use phy bit operations Marek Vasut
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