netdev - Re: [ofa-general] NetEffect, iw

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Message-Id: <20090127.160750.120120703.davem@davemloft.net>
Date:	Tue, 27 Jan 2009 16:07:50 -0800 (PST)
From:	David Miller <davem@...emloft.net>
To:	rdreier@...co.com
Cc:	aluno3@...zta.onet.pl, general@...ts.openfabrics.org,
	netdev@...r.kernel.org
Subject: Re: [ofa-general] NetEffect, iw_nes and kernel warning

From: Roland Dreier <rdreier@...co.com>
Date: Tue, 27 Jan 2009 15:53:16 -0800

> but actually I still don't see how it's safe for a net driver to
> call skb_linearize() from its transmit routine, since there's a
> chance that that will unconditionally enable BHs?

It's simply not allowed.

dev_queue_xmit() at a higher level can do __skb_linearize()
because it does so before doing the rcu_read_lock_bh().
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