Re: [PATCH] tg3: clean up PHYLIB resources on probe failure

[Andrew Lunn <andrew@lunn.ch>]

On Sat, Sep 12, 2026 at 09:21:48PM -0400, Myeonghun Pak wrote:
> tg3_get_invariants() can register an MDIO bus and connect a PHY for
> USE_PHYLIB devices. If tg3_init_one() later fails, its common error path
> releases the mappings and netdev without undoing those PHYLIB resources.
> 
> Disconnect the PHY and unregister the MDIO bus before the remaining
> teardown. The existing IS_CONNECTED and MDIOBUS_INITED flags make both
> helpers safe when initialization only completed partially.
> 
> This issue was identified during our ongoing static-analysis research while
> reviewing kernel code.
> 
> Fixes: 158d7abdae85 ("tg3: Add mdio bus registration")
> Assisted-by: OpenAI:GPT-5.6
> Co-developed-by: Ijae Kim <ae878000@gmail.com>
> Signed-off-by: Ijae Kim <ae878000@gmail.com>
> Signed-off-by: Myeonghun Pak <mhun512@gmail.com>
> ---
>  drivers/net/ethernet/broadcom/tg3.c | 5 +++++
>  1 file changed, 5 insertions(+)
> 
> diff --git a/drivers/net/ethernet/broadcom/tg3.c b/drivers/net/ethernet/broadcom/tg3.c
> index 73a4b569b..4662e0e92 100644
> --- a/drivers/net/ethernet/broadcom/tg3.c
> +++ b/drivers/net/ethernet/broadcom/tg3.c
> @@ -18047,6 +18047,11 @@ static int tg3_init_one(struct pci_dev *pdev,
>  	return 0;
>  
>  err_out_apeunmap:
> +	if (tg3_flag(tp, USE_PHYLIB)) {
> +		tg3_phy_fini(tp);
> +		tg3_mdio_fini(tp);
> +	}

Looking at tg3_get_invariants(), tg3_mdio_init() is not conditional on
USE_PHYLIB.

    Andrew

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