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Date: Mon, 18 Sep 2017 16:00:24 +0200 From: Greg KH <gregkh@...uxfoundation.org> To: kys@...rosoft.com Cc: linux-kernel@...r.kernel.org, devel@...uxdriverproject.org, olaf@...fle.de, apw@...onical.com, vkuznets@...hat.com, jasowang@...hat.com, leann.ogasawara@...onical.com, marcelo.cerri@...onical.com, sthemmin@...rosoft.com, Haiyang Zhang <haiyangz@...rosoft.com> Subject: Re: [PATCH V2 1/4] vmbus: don't acquire the mutex in vmbus_hvsock_device_unregister() On Sun, Sep 17, 2017 at 08:54:16PM -0700, kys@...hange.microsoft.com wrote: > From: Dexuan Cui <decui@...rosoft.com> > > Due to commit 54a66265d675 ("Drivers: hv: vmbus: Fix rescind handling"), > we need this patch to resolve the below deadlock: > > after we get the mutex in vmbus_hvsock_device_unregister() and call > vmbus_device_unregister() -> device_unregister() -> ... -> device_release() > -> vmbus_device_release(), we'll get a deadlock, because > vmbus_device_release() tries to get the same mutex. > > Signed-off-by: Dexuan Cui <decui@...rosoft.com> > Cc: K. Y. Srinivasan <kys@...rosoft.com> > Cc: Haiyang Zhang <haiyangz@...rosoft.com> > Cc: Stephen Hemminger <sthemmin@...rosoft.com> > Signed-off-by: K. Y. Srinivasan <kys@...rosoft.com> As every one of these patches had questions from me, please break them up into different series, one for 4.14-final, and one for 4.15-rc1. thanks, greg k-h
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