linux-kernel - Re: [char-misc 4.2] mei: nfc: fix deadlock on shutdown/suspend path

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Date:	Tue, 7 Jul 2015 15:00:54 -0700
From:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:	Linus Torvalds <torvalds@...ux-foundation.org>
Cc:	Tomas Winkler <tomas.winkler@...el.com>,
	Arnd Bergmann <arnd@...db.de>,
	Alexander Usyskin <alexander.usyskin@...el.com>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Samuel Ortiz <sameo@...ux.intel.com>
Subject: Re: [char-misc 4.2] mei: nfc: fix deadlock on shutdown/suspend path

On Tue, Jul 07, 2015 at 02:40:13PM -0700, Linus Torvalds wrote:
> On Tue, Jul 7, 2015 at 2:22 PM, Tomas Winkler <tomas.winkler@...el.com> wrote:
> > In function mei_nfc_host_exit mei_cl_remove_device cannot be called
> > under the device mutex as device removing flow invokes the device driver
> > remove handler that calls in turn to mei_cl_disable_device which
> > naturally acquires the device mutex.
> 
> Yup, tested and confirmed. This patch fixes things for me without the
> revert. Thanks.
> 
> Greg, should I just apply it directly, or do we go through your tree?

Feel free to take it directly, that way it fixes your laptop now, I
don't have any other pending char-misc patches at the moment.

Acked-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

thanks,

greg k-h
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