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Date:   Thu, 7 May 2020 08:44:12 +0200
From:   Johan Hovold <johan@kernel.org>
To:     Naresh Kamboju <naresh.kamboju@linaro.org>,
        Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc:     Johan Hovold <johan@kernel.org>,
        linux- stable <stable@vger.kernel.org>,
        Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        Sasha Levin <sashal@kernel.org>,
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        "open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS" 
        <devicetree@vger.kernel.org>, lkft-triage@lists.linaro.org
Subject: Re: [PATCH net 11/16] net: ethernet: marvell: mvneta: fix fixed-link
 phydev leaks
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On Thu, May 07, 2020 at 12:27:53AM +0530, Naresh Kamboju wrote:
> On Tue, 29 Nov 2016 at 00:00, Johan Hovold <johan@kernel.org> wrote:
> >
> > Make sure to deregister and free any fixed-link PHY registered using
> > of_phy_register_fixed_link() on probe errors and on driver unbind.
> >
> > Fixes: 83895bedeee6 ("net: mvneta: add support for fixed links")
> > Signed-off-by: Johan Hovold <johan@kernel.org>
> > ---
> >  drivers/net/ethernet/marvell/mvneta.c | 5 +++++
> >  1 file changed, 5 insertions(+)
> >
> > diff --git a/drivers/net/ethernet/marvell/mvneta.c b/drivers/net/ethernet/marvell/mvneta.c
> > index 0c0a45af950f..707bc4680b9b 100644
> > --- a/drivers/net/ethernet/marvell/mvneta.c
> > +++ b/drivers/net/ethernet/marvell/mvneta.c
> > @@ -4191,6 +4191,8 @@ static int mvneta_probe(struct platform_device *pdev)
> >         clk_disable_unprepare(pp->clk);
> >  err_put_phy_node:
> >         of_node_put(phy_node);
> > +       if (of_phy_is_fixed_link(dn))
> > +               of_phy_deregister_fixed_link(dn);
> 
> While building kernel Image for arm architecture on stable-rc 4.4 branch
> the following build error found.
> 
> drivers/net/ethernet/marvell/mvneta.c:3442:3: error: implicit
> declaration of function 'of_phy_deregister_fixed_link'; did you mean
> 'of_phy_register_fixed_link'? [-Werror=implicit-function-declaration]
> |    of_phy_deregister_fixed_link(dn);
> |    ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
> |    of_phy_register_fixed_link
> 
> ref:
> https://gitlab.com/Linaro/lkft/kernel-runs/-/jobs/541374729

Greg, 3f65047c853a ("of_mdio: add helper to deregister fixed-link
PHYs") needs to be backported as well for these.

Original series can be found here:

	https://lkml.kernel.org/r/1480357509-28074-1-git-send-email-johan@kernel.org

Johan