netdev - Re: [PATCH (net-next.git) 2/2] stmmac: fix MDIO settings

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Date:	Wed, 16 Mar 2016 12:03:14 +0100
From:	Andreas Färber <afaerber@...e.de>
To:	Gabriel Fernandez <gabriel.fernandez@...aro.org>,
	Giuseppe Cavallaro <peppe.cavallaro@...com>
Cc:	netdev@...r.kernel.org, fschaefer.oss@...glemail.com,
	Dinh Nguyen <dinh.linux@...il.com>,
	"David S. Miller" <davem@...emloft.net>,
	Phil Reid <preid@...ctromag.com.au>
Subject: Re: [PATCH (net-next.git) 2/2] stmmac: fix MDIO settings

Am 16.03.2016 um 12:01 schrieb Gabriel Fernandez:
> Hi Pepe,
> 
> i have a kernel crash
> 
> [    2.714097] Unable to handle kernel NULL pointer dereference at
> virtual address 000001d6
> [    2.722188] pgd = c0204000
> [    2.724886] [000001d6] *pgd=00000000
> [    2.728452] Internal error: Oops: 5 [#1] SMP ARM
> [    2.733054] Modules linked in:
> [    2.736095] CPU: 1 PID: 1 Comm: swapper/0 Not tainted
> 4.5.0-rc7-01768-g3407893 #36
> [    2.743649] Hardware name: STiH415/416 SoC with Flattened Device Tree
> [    2.750074] task: ee070000 ti: ee05e000 task.ti: ee05e000
> [    2.755467] PC is at stmmac_open+0xcc/0xc40
> [    2.759641] LR is at of_phy_connect+0x44/0x5c
> 
> 
>> diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
>> index 4c5ce98..943500b 100644
>> --- a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
>> +++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
>> @@ -278,7 +278,6 @@ static void stmmac_eee_ctrl_timer(unsigned long arg)
>>   */
>>  bool stmmac_eee_init(struct stmmac_priv *priv)
>>  {
>> -       char *phy_bus_name = priv->plat->phy_bus_name;
>>         unsigned long flags;
>>         bool ret = false;
>>
>> @@ -290,7 +289,7 @@ bool stmmac_eee_init(struct stmmac_priv *priv)
>>                 goto out;
>>
>>         /* Never init EEE in case of a switch is attached */
>> -       if (phy_bus_name && (!strcmp(phy_bus_name, "fixed")))
>> +       if (priv->phydev->is_pseudo_fixed_link)
> 
> priv->phydev is not yet affected
> replace by if (phydev->is_pseudo_fixed_link) instead ?

Indeed that's how I had it in my own patch before. Thanks for spotting.

Regards,
Andreas

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