Re: [PATCH net-next v2 08/14] net: mvpp2: check the netif is running in the link_event function

[Florian Fainelli]

On 08/25/2017 07:48 AM, Antoine Tenart wrote:
> This patch adds an extra check when the link_event function is called,
> so that it won't do anything when the netif isn't running.

Why is this needed? Are you possibly starting the PHY state machine
earlier than your ndo_open() call? Looking quickly through the driver
does not suggest this is going on since you properly connect to the PHY
in mvpp2_open() and start the PHY there.

> 
> Signed-off-by: Antoine Tenart <antoine.tenart@xxxxxxxxxxxxxxxxxx>
> ---
>  drivers/net/ethernet/marvell/mvpp2.c | 3 +++
>  1 file changed, 3 insertions(+)
> 
> diff --git a/drivers/net/ethernet/marvell/mvpp2.c b/drivers/net/ethernet/marvell/mvpp2.c
> index 1b26f5ed994f..49a6789a4142 100644
> --- a/drivers/net/ethernet/marvell/mvpp2.c
> +++ b/drivers/net/ethernet/marvell/mvpp2.c
> @@ -5741,6 +5741,9 @@ static void mvpp2_link_event(struct net_device *dev)
>  	struct mvpp2_port *port = netdev_priv(dev);
>  	struct phy_device *phydev = dev->phydev;
>  
> +	if (!netif_running(dev))
> +		return;
> +
>  	if (phydev->link) {
>  		if ((port->speed != phydev->speed) ||
>  		    (port->duplex != phydev->duplex)) {
> 


-- 
Florian