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From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To: Lucas Stach <l.stach@pengutronix.de>
Cc: linux-kernel@vger.kernel.org, patchwork-lst@pengutronix.de,
	kernel@pengutronix.de
Subject: Re: [PATCH] driver core: unbind consumers before locking parent on device unbind
Date: Fri, 17 Feb 2017 10:42:42 -0800	[thread overview]
Message-ID: <20170217184242.GA11935@kroah.com> (raw)
In-Reply-To: <20170217183629.3628-1-l.stach@pengutronix.de>

On Fri, Feb 17, 2017 at 07:36:29PM +0100, Lucas Stach wrote:
> On forced unbind the parent lock is taken, as the device might be a USB
> device. The device to be unbound might have active consumers, which
> must be unbound before calling device_release_driver(), otherwise this
> function might deadlock when trying to take the parent lock during
> consumer unbind.

Really?  What type of device does this fail on today?

thanks,

greg k-h

  reply	other threads:[~2017-02-17 18:42 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-02-17 18:36 Lucas Stach
2017-02-17 18:42 ` Greg Kroah-Hartman [this message]
2017-02-17 18:46   ` Lucas Stach

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