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From: Andrew Lunn <andrew@lunn.ch>
To: Chenguang Zhao <chenguang.zhao@linux.dev>
Cc: hkallweit1@gmail.com, linux@armlinux.org.uk, davem@davemloft.net,
	edumazet@google.com, kuba@kernel.org, pabeni@redhat.com,
	netdev@vger.kernel.org, Chenguang Zhao <zhaochenguang@kylinos.cn>,
	syzbot+694b49f41098a5df4fd7@syzkaller.appspotmail.com
Subject: Re: [PATCH net] net: phy: allow phy_detach() before netdev registration
Date: Wed, 16 Sep 2026 14:12:27 +0200	[thread overview]
Message-ID: <d523dec3-7075-47d9-8ac2-6b3c9d6cec3d@lunn.ch> (raw)
In-Reply-To: <20260916021505.238990-1-chenguang.zhao@linux.dev>

On Wed, Sep 16, 2026 at 10:15:05AM +0800, Chenguang Zhao wrote:
> From: Chenguang Zhao <zhaochenguang@kylinos.cn>
> 
> phylink_connect_phy() may be called from probe without RTNL while the
> net_device is still NETREG_UNINITIALIZED. If PHY bring-up fails,
> phy_detach() uses rtnl_dereference(dev->hwprov) and lockdep reports
> suspicious RCU usage.

What do you mean by PHY bring-up?

     Andrew

  reply	other threads:[~2026-09-16 12:12 UTC|newest]

Thread overview: 9+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2026-09-16  2:15 [PATCH net] net: phy: allow phy_detach() before netdev registration Chenguang Zhao
2026-09-16 12:12 ` Andrew Lunn [this message]
2026-09-17  7:06   ` Chenguang Zhao
2026-09-17 12:04     ` Andrew Lunn
2026-09-21  2:03       ` Chenguang Zhao
2026-09-21 12:15         ` Andrew Lunn
2026-09-23  7:16           ` Chenguang Zhao
2026-09-20  2:32 ` netdev-bot+sashiko
2026-09-21  2:09   ` Chenguang Zhao

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