linux-kernel - Re: [PATCH] stmmac: Fix phy without MDIO subnode

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Message-ID: <20160324170119.28d54ed5.john@metanate.com>
Date:	Thu, 24 Mar 2016 17:01:19 +0000
From:	John Keeping <john@...anate.com>
To:	Giuseppe CAVALLARO <peppe.cavallaro@...com>
Cc:	Gabriel Fernandez <gabriel.fernandez@...aro.org>,
	<netdev@...r.kernel.org>, <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] stmmac: Fix phy without MDIO subnode

On Thu, 24 Mar 2016 13:56:02 +0100, Giuseppe CAVALLARO wrote:

> This should be fixed by some work done some days
> ago and not yet committed.
> 
> Pls see "stmmac: MDIO fixes" patch-set and let me know
> if ok on your side.

Yes, that works for me.


Thanks,
John

> On 3/24/2016 11:56 AM, John Keeping wrote:
> > Since commit 88f8b1bb41c6 ("stmmac: Fix 'eth0: No PHY found'
> > regression") we no longer allocate mdio_bus_data unless there is a MDIO
> > subnode.  This breaks the ethernet on the Radxa Rock2 (using
> > rk3288-rock2-square.dts) which does not have an MDIO subnode.
> >
> > That commit was correct that the phy_bus_name test is unhelpful since we
> > allocate "plat" in the same function and never set phy_bus_name so let's
> > just drop the test which restores the previous behaviour.
> >
> > Fixes: 88f8b1bb41c6 ("stmmac: Fix 'eth0: No PHY found' regression")
> > Signed-off-by: John Keeping <john@...anate.com>
> > ---
> >   drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c | 2 +-
> >   1 file changed, 1 insertion(+), 1 deletion(-)
> >
> > diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c
> > index dcbd2a1..e0fa060 100644
> > --- a/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c
> > +++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c
> > @@ -189,7 +189,7 @@ stmmac_probe_config_dt(struct platform_device *pdev, const char **mac)
> >   	if (of_property_read_u32(np, "snps,phy-addr", &plat->phy_addr) == 0)
> >   		dev_warn(&pdev->dev, "snps,phy-addr property is deprecated\n");
> >
> > -	if ((plat->phy_node && !of_phy_is_fixed_link(np)) || !plat->mdio_node)
> > +	if ((plat->phy_node && !of_phy_is_fixed_link(np)))
> >   		plat->mdio_bus_data = NULL;
> >   	else
> >   		plat->mdio_bus_data =
> >  
>