netdev - Re: [PATCH net] net: phy: nxp-c45-tja11xx: add remove callback

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Date:   Tue, 11 Apr 2023 12:05:07 +0200
From:   Paolo Abeni <pabeni@...hat.com>
To:     "Radu Pirea (OSS)" <radu-nicolae.pirea@....nxp.com>,
        andrew@...n.ch, hkallweit1@...il.com, linux@...linux.org.uk,
        davem@...emloft.net, edumazet@...gle.com, kuba@...nel.org
Cc:     netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
        stable@...r.kernel.org
Subject: Re: [PATCH net] net: phy: nxp-c45-tja11xx: add remove callback

On Thu, 2023-04-06 at 12:59 +0300, Radu Pirea (OSS) wrote:
> Unregister PTP clock when the driver is removed.
> Purge the RX and TX skb queues.
> 
> Fixes: 514def5dd339 ("phy: nxp-c45-tja11xx: add timestamping support")
> CC: stable@...r.kernel.org # 5.15+
> Signed-off-by: Radu Pirea (OSS) <radu-nicolae.pirea@....nxp.com>

Andrew: my understanding is that a connected phy, maintains a reference
to the relevant driver via phydev->mdio.dev.driver->owner, and such
reference is dropped by phy_disconnect() via phy_detach().

So remove can invoked only after phy_disconnect

Does the above sounds reasonable/answer your question?

Thanks

Paolo