netdev - Re: [PATCH v2] usbnet: asix AX88772: leave the carrier control to phylink

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Message-ID: <Z_e2DtOnQPbQmrj1@pengutronix.de>
Date: Thu, 10 Apr 2025 14:14:06 +0200
From: Oleksij Rempel <o.rempel@...gutronix.de>
To: Krzysztof Hałasa <khalasa@...p.pl>
Cc: netdev <netdev@...r.kernel.org>, Oliver Neukum <oneukum@...e.com>,
	Andrew Lunn <andrew+netdev@...n.ch>,
	"David S. Miller" <davem@...emloft.net>,
	Eric Dumazet <edumazet@...gle.com>,
	Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>,
	linux-usb@...r.kernel.org, linux-kernel@...r.kernel.org,
	Jose Ignacio Tornos Martinez <jtornosm@...hat.com>,
	Ming Lei <ming.lei@...hat.com>
Subject: Re: [PATCH v2] usbnet: asix AX88772: leave the carrier control to
 phylink

On Tue, Apr 08, 2025 at 01:59:41PM +0200, Krzysztof Hałasa wrote:
> ASIX AX88772B based USB 10/100 Ethernet adapter doesn't come
> up ("carrier off"), despite the built-in 100BASE-FX PHY positive link
> indication. The internal PHY is configured (using EEPROM) in fixed
> 100 Mbps full duplex mode.
> 
> The primary problem appears to be using carrier_netif_{on,off}() while,
> at the same time, delegating carrier management to phylink. Use only the
> latter and remove "manual control" in the asix driver.
> 
> I don't have any other AX88772 board here, but the problem doesn't seem
> specific to a particular board or settings - it's probably
> timing-dependent.
> 
> Remove unused asix_adjust_link() as well.
> 
> Signed-off-by: Krzysztof Hałasa <khalasa@...p.pl>

Tested-by: Oleksij Rempel <o.rempel@...gutronix.de>
 
Link detection is still working on variants with copper interface.

Thank you!

Best Regards,
Oleksij
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