From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Cc: linux-kernel@vger.kernel.org,
Linux Media Mailing List <linux-media@vger.kernel.org>
Subject: Re: [Q] reprobe deferred-probing drivers
Date: Wed, 17 Oct 2012 08:02:17 -0700 [thread overview]
Message-ID: <20121017150217.GA29424@kroah.com> (raw)
In-Reply-To: <Pine.LNX.4.64.1210171021060.7402@axis700.grange>
On Wed, Oct 17, 2012 at 10:27:36AM +0200, Guennadi Liakhovetski wrote:
> Hi
>
> I've got a situation, for which I currently don't have a (good) solution.
>
> Let's say device A depends on device B and as long as B hasn't probed, A
> requests deferred probing. Now B probes, which causes A to also succeed
> its probing. Next we want to remove B, say, by unloading its driver. A has
> to go back into "deferred-probing" state. How do we do it? This can be
> achieved by unloading B's driver and loading again. Essentially, we have
> to use the sysfs "unbind" and then the "bind" attributes. But how do we do
> this from the kernel? Shall we export driver_bind() and driver_unbind()?
No, no driver should ever have to mess with that at all, it is up to the
bus to do this. Do you have a pointer to the code you are concerned
about?
greg k-h
next prev parent reply other threads:[~2012-10-17 15:02 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-10-17 8:27 [Q] reprobe deferred-probing drivers Guennadi Liakhovetski
2012-10-17 8:43 ` Guennadi Liakhovetski
2012-10-17 16:02 ` Ming Lei
2012-10-17 15:02 ` Greg Kroah-Hartman [this message]
2012-10-17 15:10 ` Guennadi Liakhovetski
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