netdev - Re: [PATCH] atm: lec use dev_change

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Message-ID: <49C34990.1020500@cn.fujitsu.com>
Date:	Fri, 20 Mar 2009 15:45:20 +0800
From:	Yang Hongyang <yanghy@...fujitsu.com>
To:	Stephen Hemminger <shemminger@...tta.com>
CC:	David Miller <davem@...emloft.net>, chas@....nrl.navy.mil,
	netdev@...r.kernel.org
Subject: Re: [PATCH] atm: lec use dev_change_mtu

Stephen Hemminger wrote:
> Rather than calling device pointer directly (which is incorrect with
> net_device_ops), use the standard dev_change_mtu. Compile tested only.
> 
> Signed-off-by: Stephen Hemminger <shemminger@...tta.com>
> 
> --- a/net/atm/lec.c	2009-03-19 17:18:35.140652628 -0700
> +++ b/net/atm/lec.c	2009-03-19 17:19:19.500777355 -0700
> @@ -502,7 +502,7 @@ static int lec_atm_send(struct atm_vcc *
>  		priv->lane2_ops = NULL;
>  		if (priv->lane_version > 1)
>  			priv->lane2_ops = &lane2_ops;
> -		if (dev->change_mtu(dev, mesg->content.config.mtu))
> +		if (dev_set_mtu(dev, mesg->content.config.mtu))

I think it's not correct.This dev->change_mtu is:
 663 static int lec_change_mtu(struct net_device *dev, int new_mtu)
 664 {
 665         if ((new_mtu < 68) || (new_mtu > 18190))
 666                 return -EINVAL;
 667         dev->mtu = new_mtu;
		^^^^^^^^^^^^^^^^maybe should use dev_set_mtu() here.
 668         return 0;
 669 }

and it's not quite same as dev_set_mtu.

>  			printk("%s: change_mtu to %d failed\n", dev->name,
>  			       mesg->content.config.mtu);
>  		priv->is_proxy = mesg->content.config.is_proxy;
> --
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> 


-- 
Regards
Yang Hongyang
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