From: Bartlomiej Zolnierkiewicz <B.Zolnierkiewicz@elka.pw.edu.pl>
To: Patrick Mochel <mochel@osdl.org>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>,
linux-kernel mailing list <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH] Fix ide unregister vs. driver model
Date: Mon, 25 Aug 2003 23:06:14 +0200 [thread overview]
Message-ID: <200308252306.14131.bzolnier@elka.pw.edu.pl> (raw)
In-Reply-To: <Pine.LNX.4.44.0308251358020.1157-100000@cherise>
Ok, thanks.
On Monday 25 of August 2003 22:59, Patrick Mochel wrote:
> > > We have no race with the patch, that is we have no race when we wait
> > > for the semaphore after calling unregister(). We have a race if we
> > > don't as unregister() will drop a reference, but we may have pending
> > > ones from sysfs still... so if we don't wait for release() to be
> > > called, we may overwrite a struct device currently beeing used by
> > > sysfs.
> >
> > Nope, I don't think struct device can be used by sysfs after execution
> > of device_unregister() (I've checked driver model and sysfs code).
>
> It can, if the sysfs file for the device was held open while, at the same
> time, the device was unregistered. You cannot, however, obtain new
> references to the device.
next prev parent reply other threads:[~2003-08-25 21:06 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-08-24 13:05 [PATCH] Fix ide unregister vs. driver model Benjamin Herrenschmidt
2003-08-24 22:23 ` Bartlomiej Zolnierkiewicz
2003-08-25 6:34 ` Benjamin Herrenschmidt
2003-08-25 20:50 ` Bartlomiej Zolnierkiewicz
2003-08-25 20:54 ` viro
2003-08-25 20:59 ` Patrick Mochel
2003-08-25 21:06 ` Bartlomiej Zolnierkiewicz [this message]
2003-08-25 10:01 ` insecure
2003-08-25 10:04 ` Benjamin Herrenschmidt
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