From: David Brownell <david-b@pacbell.net>
To: Jeff Garzik <jgarzik@pobox.com>
Cc: Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
Greg Kroah-Hartman <greg@kroah.com>,
Linus Torvalds <torvalds@osdl.org>
Subject: Re: [PATCH] USB: fix Scheduling while atomic warning when resuming.
Date: Tue, 21 Dec 2004 20:59:15 -0800 [thread overview]
Message-ID: <200412212059.15426.david-b@pacbell.net> (raw)
In-Reply-To: <41C8FC25.2060304@pobox.com>
On Tuesday 21 December 2004 8:46 pm, Jeff Garzik wrote:
> > If that lock were dropped, what would prevent other tasks from
> > touching the hardware while it's sending RESUME signaling down
> > the bus, and thereby mucking up the resume sequence?
>
> Precisely what other tasks are active for this hardware, during resume?
There's no guarantee that suspend() and resume() methods
are only called during system-wide suspend and resume.
And likewise, if there were no other tasks, why should
you even be concerned about spinning vs sleeping?
- Dave
next prev parent reply other threads:[~2004-12-22 4:59 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <200412220103.iBM13wS0002158@hera.kernel.org>
2004-12-22 3:48 ` [PATCH] USB: fix Scheduling while atomic warning when resuming Jeff Garzik
2004-12-22 4:22 ` David Brownell
2004-12-22 4:46 ` Jeff Garzik
2004-12-22 4:59 ` David Brownell [this message]
2004-12-22 5:27 ` Jeff Garzik
2004-12-22 11:59 ` Benjamin Herrenschmidt
2004-12-22 16:16 ` David Brownell
2004-12-22 16:35 ` Benjamin Herrenschmidt
2004-12-22 16:14 ` David Brownell
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