linux-kernel - Re: [PATCH 1/1] Drivers: hv: vmbus: Add timeout to vmbus_wait_for

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Date:   Mon, 14 Sep 2020 09:02:59 +0000
From:   Wei Liu <wei.liu@...nel.org>
To:     Dexuan Cui <decui@...rosoft.com>
Cc:     Michael Kelley <mikelley@...rosoft.com>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        vkuznets <vkuznets@...hat.com>,
        KY Srinivasan <kys@...rosoft.com>,
        Stephen Hemminger <sthemmin@...rosoft.com>,
        "wei.liu@...nel.org" <wei.liu@...nel.org>,
        "linux-hyperv@...r.kernel.org" <linux-hyperv@...r.kernel.org>
Subject: Re: [PATCH 1/1] Drivers: hv: vmbus: Add timeout to
 vmbus_wait_for_unload

On Sun, Sep 13, 2020 at 07:56:30PM +0000, Dexuan Cui wrote:
> > From: linux-hyperv-owner@...r.kernel.org
> > <linux-hyperv-owner@...r.kernel.org> On Behalf Of Michael Kelley
> > Sent: Sunday, September 13, 2020 12:47 PM
> > 
> > vmbus_wait_for_unload() looks for a CHANNELMSG_UNLOAD_RESPONSE
> > message
> > coming from Hyper-V.  But if the message isn't found for some reason,
> > the panic path gets hung forever.  Add a timeout of 10 seconds to prevent
> > this.
> > 
> > Fixes: 415719160de3 ("Drivers: hv: vmbus: avoid scheduling in interrupt
> > context in vmbus_initiate_unload()")
> > Signed-off-by: Michael Kelley <mikelley@...rosoft.com>
> 
> Reviewed-by: Dexuan Cui <decui@...rosoft.com>

LGTM.

Applied to hyperv-fixes. Thanks.

Wei.