[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Message-ID: <20071116203748.GA11770@kroah.com>
Date: Fri, 16 Nov 2007 12:37:48 -0800
From: Greg KH <greg@...ah.com>
To: Alan Stern <stern@...land.harvard.edu>
Cc: David Woodhouse <dwmw2@...radead.org>,
USB development list <linux-usb-devel@...ts.sourceforge.net>,
Kernel development list <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] Driver core: fix race in __device_release_driver
On Fri, Nov 16, 2007 at 11:57:28AM -0500, Alan Stern wrote:
> This patch (as1013) was suggested by David Woodhouse; it fixes a race
> in the driver core. If a device is unregistered at the same time as
> its driver is unloaded, the driver's code pages may be unmapped while
> the remove method is still running. The calls to get_driver() and
> put_driver() were intended to prevent this, but they don't work if the
> driver's module count has already dropped to 0.
>
> Instead, the patch keeps the device on the driver's list until after
> the remove method has returned. This forces the necessary
> synchronization to occur.
Is this something that you all feel is worth getting in for 2.6.24?
Does it fix a regression that just showed up, or is just a bugfix for
something that people finally realized has always been there?
Can it wait for 2.6.25 to get some more testing in -mm?
thanks,
greg k-h
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
Powered by blists - more mailing lists