netdev - Re: [PATCH v2] net: usb: asix_devices: add phy

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Message-ID: <20250813163636.21b5a3f5@kernel.org>
Date: Wed, 13 Aug 2025 16:36:36 -0700
From: Jakub Kicinski <kuba@...nel.org>
To: andrew@...n.ch, o.rempel@...gutronix.de
Cc: Xu Yang <xu.yang_2@....com>, davem@...emloft.net, edumazet@...gle.com,
 pabeni@...hat.com, max.schulze@...ine.de, khalasa@...p.pl,
 linux-usb@...r.kernel.org, netdev@...r.kernel.org, imx@...ts.linux.dev
Subject: Re: [PATCH v2] net: usb: asix_devices: add phy_mask for ax88772
 mdio bus

On Mon, 11 Aug 2025 17:29:31 +0800 Xu Yang wrote:
> Without setting phy_mask for ax88772 mdio bus, current driver may create
> at most 32 mdio phy devices with phy address range from 0x00 ~ 0x1f.
> DLink DUB-E100 H/W Ver B1 is such a device. However, only one main phy
> device will bind to net phy driver. This is creating issue during system
> suspend/resume since phy_polling_mode() in phy_state_machine() will
> directly deference member of phydev->drv for non-main phy devices. Then
> NULL pointer dereference issue will occur. Due to only external phy or
> internal phy is necessary, add phy_mask for ax88772 mdio bus to workarnoud
> the issue.

Andrew, Oleksij, this looks like v2 of
https://lore.kernel.org/all/20250806082931.3289134-1-xu.yang_2@nxp.com/
are you willing to venture a Review tag here ? :)