linux-kernel - Re: [PATCH 1/2 V2] kaweth: Fix locking to be SMP-safe

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Message-Id: <200904010106.10974.oliver@neukum.org>
Date:	Wed, 1 Apr 2009 01:06:10 +0200
From:	Oliver Neukum <oliver@...kum.org>
To:	David Miller <davem@...emloft.net>
Cc:	Larry.Finger@...inger.net, jgarzik@...ox.com,
	linux-kernel@...r.kernel.org, netdev@...r.kernel.org
Subject: Re: [PATCH 1/2 V2] kaweth: Fix locking to be SMP-safe

Am Mittwoch 01 April 2009 00:10:28 schrieb David Miller:
> > Here you enable interrupts. Are you sure ndo_start_xmit is never
> > called with interrupts disabled?
>
> It must never be invoked that way, this would break so many
> drivers.
>
> On the other hand, all of these driver paths never execute
> in a real hardware interrupt context, the deepest it gets
> into is software interrupts.  So spin_*lock*_bh() might be
> more appropriate.

Thanks. The patch is good. I'll check the other USB network
drivers.

	Regards
		Oliver

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