linux-kernel - Re: [PATCH 0/5] Call netif_carrier_off() after register

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Message-ID: <87boicz8l7.fsf@nemi.mork.no>
Date:	Wed, 15 Aug 2012 13:40:52 +0200
From:	Bjørn Mork <bjorn@...k.no>
To:	Ben Hutchings <bhutchings@...arflare.com>
Cc:	David Miller <davem@...emloft.net>, <shchepetkov@...ras.ru>,
	<netdev@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
	<ldv-project@...ras.ru>
Subject: Re: [PATCH 0/5] Call netif_carrier_off() after register_netdev()

Ben Hutchings <bhutchings@...arflare.com> writes:

> But if you do it beforehand then it doesn't have the intended effect.
> (Supposed to be fixed by 22604c866889c4b2e12b73cbf1683bda1b72a313, which
> had to be reverted: c276e098d3ee33059b4a1c747354226cec58487c.)
>
> So you have to do it after, but without dropping the RTNL lock in
> between.

So you may want to add something like

int register_netdev_carrier_off(struct net_device *dev)
{
	int err;

	rtnl_lock();
	err = register_netdevice(dev);
        if (!err)
                set_bit(__LINK_STATE_NOCARRIER, &dev->state)
	rtnl_unlock();
	return err;
}


for these drivers?



Bjørn
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