Re: [PATCH] driver core: unbind consumers before locking parent on device unbind

From: Greg Kroah-Hartman
Date: Fri Feb 17 2017 - 13:42:49 EST

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?


greg k-h