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

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Message-ID: <KU1P153MB01202778DC760ED16AD687F4BF220@KU1P153MB0120.APCP153.PROD.OUTLOOK.COM>
Date:   Sun, 13 Sep 2020 19:56:30 +0000
From:   Dexuan Cui <decui@...rosoft.com>
To:     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>
CC:     Michael Kelley <mikelley@...rosoft.com>
Subject: RE: [PATCH 1/1] Drivers: hv: vmbus: Add timeout to
 vmbus_wait_for_unload

> 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>