linux-kernel - Re: refcounting drivers' data structures used in sysfs buffers

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Message-Id: <200703122049.03113.oneukum@suse.de>
Date:	Mon, 12 Mar 2007 20:49:01 +0100
From:	Oliver Neukum <oneukum@...e.de>
To:	Alan Stern <stern@...land.harvard.edu>
Cc:	Dmitry Torokhov <dmitry.torokhov@...il.com>,
	Maneesh Soni <maneesh@...ibm.com>, gregkh@...e.de,
	linux-kernel@...r.kernel.org
Subject: Re: refcounting drivers' data structures used in sysfs buffers

Am Montag, 12. März 2007 20:31 schrieb Alan Stern:
> On Mon, 12 Mar 2007, Oliver Neukum wrote:
> 
> > > I'm with Dmitry; the whole thing becomes much, much simpler if we put back
> > > your patch and prevent sysfs access after unregistering an attribute 
> > > file.  No API changes are needed, no driver changes are needed, no radical 
> > > core changes are needed,...  All we would have to do is fix the one SCSI 
> > > method to make it use a workqueue.
> > 
> > Try.
> 
> I did.  Didn't you see this message from Saturday:
> 
> http://marc.theaimsgroup.com/?l=linux-kernel&m=117355959020831&w=2

Yes. In this case, silence is partial agreement. However, convincing me
is futile if Linus rejects the approach.

I wrote the original patch. But this problem must be solved. If the
first attempt is rejected, I'll try another.

> I sent it to Linus as well as to all of you.  No replies received so far 
> from anybody.
> 
> >  I don't like reverting my own code. But I predict he'll tell you that a
> > driver's bond with a device should be represented in a data structure
> > that is to be refcounted.
> 
> :-)

Coming to think about it, he might be right there.

	Regards
		Oliver
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