Re: [PATCH] net: stmmac: dwmac-sun8i: Use reset exclusive

From: Maxime Ripard
Date: Fri Aug 25 2017 - 13:12:52 EST


On Fri, Aug 25, 2017 at 05:17:33PM +0200, Corentin Labbe wrote:
> On Fri, Aug 25, 2017 at 04:48:32PM +0200, Maxime Ripard wrote:
> > On Fri, Aug 25, 2017 at 04:38:05PM +0200, Corentin Labbe wrote:
> > > The current dwmac_sun8i module cannot be rmmod/modprobe due to that
> > > the reset controller was not released when removed.
> > >
> > > This patch remove ambiguity, by using of_reset_control_get_exclusive and
> > > add the missing reset_control_put().
> > >
> > > Signed-off-by: Corentin Labbe <clabbe.montjoie@xxxxxxxxx>
> > > ---
> > > drivers/net/ethernet/stmicro/stmmac/dwmac-sun8i.c | 3 ++-
> > > 1 file changed, 2 insertions(+), 1 deletion(-)
> > >
> > > diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac-sun8i.c b/drivers/net/ethernet/stmicro/stmmac/dwmac-sun8i.c
> > > index fffd6d5fc907..675a09629d85 100644
> > > --- a/drivers/net/ethernet/stmicro/stmmac/dwmac-sun8i.c
> > > +++ b/drivers/net/ethernet/stmicro/stmmac/dwmac-sun8i.c
> > > @@ -782,6 +782,7 @@ static int sun8i_dwmac_unpower_internal_phy(struct sunxi_priv_data *gmac)
> > >
> > > clk_disable_unprepare(gmac->ephy_clk);
> > > reset_control_assert(gmac->rst_ephy);
> > > + reset_control_put(gmac->rst_ephy);
> > > return 0;
> > > }
> > >
> > > @@ -942,7 +943,7 @@ static int sun8i_dwmac_probe(struct platform_device *pdev)
> > > return -EINVAL;
> > > }
> > >
> > > - gmac->rst_ephy = of_reset_control_get(plat_dat->phy_node, NULL);
> > > + gmac->rst_ephy = of_reset_control_get_exclusive(plat_dat->phy_node, NULL);
> >
> > Why not just use devm_reset_control_get?
> >
>
> Because there no devm_ functions with of_

devm_reset_control_get uses of_reset_control_get internally.

Maxime

--
Maxime Ripard, Free Electrons
Embedded Linux and Kernel engineering
http://free-electrons.com

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