netdev - Re: [Nios2-dev] [PATCH] Altera TSE: Add missing phydev

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Date:	Thu, 25 Dec 2014 13:52:39 +0100
From:	Tobias Klauser <tklauser@...tanz.ch>
To:	Kostya Belezko <bkostya@...mail.com>
Cc:	Nios2-dev <nios2-dev@...ts.rocketboards.org>,
	Vince Bridgers <vbridgers2013@...il.com>,
	netdev@...r.kernel.org
Subject: Re: [Nios2-dev] [PATCH] Altera TSE: Add missing phydev

On 2014-12-22 at 23:37:19 +0100, Kostya Belezko <bkostya@...mail.com> wrote:
> Altera network device doesn't come up after
> 
> ifconfig eth0 down
> ifconfig eth0 up
> 
> The reason behind is clearing priv->phydev during tse_shutdown().
> The phydev is not restored back at tse_open().
> 
> Signed-off-by: Kostya Belezko <bkostya@...mail.com>

Please Cc: netdev@...r.kernel.org for network driver patches.

> ---
>  drivers/net/ethernet/altera/altera_tse_main.c | 3 +++
>  1 file changed, 3 insertions(+)
> 
> diff --git a/drivers/net/ethernet/altera/altera_tse_main.c b/drivers/net/ethernet/altera/altera_tse_main.c
> index 4efc435..361bf35 100644
> --- a/drivers/net/ethernet/altera/altera_tse_main.c
> +++ b/drivers/net/ethernet/altera/altera_tse_main.c
> @@ -1150,6 +1150,9 @@ static int tse_open(struct net_device *dev)
>  
>  	spin_unlock_irqrestore(&priv->rxdma_irq_lock, flags);
>  
> +	if (!priv->phydev)
> +		init_phy(dev);

That way the PHY will be initialized twice on first start.

IMO the proper solution would be to disconnect and NULL the phydev in
altera_tse_remove, not in tse_shutdown. There, only phy_stop should be
called.
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