linux-kernel - RE: [PATCH v2 6/7] Drivers: hv: vmbus: Suspend/resume the vmbus itself for hibernation

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Message-ID: <DM5PR21MB0137C778E75E6A90234C7B5AD7D40@DM5PR21MB0137.namprd21.prod.outlook.com>
Date:   Wed, 7 Aug 2019 15:22:49 +0000
From:   Michael Kelley <mikelley@...rosoft.com>
To:     Dexuan Cui <decui@...rosoft.com>,
        "linux-hyperv@...r.kernel.org" <linux-hyperv@...r.kernel.org>,
        "gregkh@...uxfoundation.org" <gregkh@...uxfoundation.org>,
        Stephen Hemminger <sthemmin@...rosoft.com>,
        Sasha Levin <Alexander.Levin@...rosoft.com>,
        "sashal@...nel.org" <sashal@...nel.org>,
        Haiyang Zhang <haiyangz@...rosoft.com>,
        KY Srinivasan <kys@...rosoft.com>,
        "tglx@...utronix.de" <tglx@...utronix.de>
CC:     "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: RE: [PATCH v2 6/7] Drivers: hv: vmbus: Suspend/resume the vmbus
 itself for hibernation

From: Dexuan Cui <decui@...rosoft.com> Sent: Wednesday, July 31, 2019 10:52 AM
> 
> Before Linux enters hibernation, it sends the CHANNELMSG_UNLOAD message to
> the host so all the offers are gone. After hibernation, Linux needs to
> re-negotiate with the host using the same vmbus protocol version (which
> was in use before hibernation), and ask the host to re-offer the vmbus
> devices.
> 
> Signed-off-by: Dexuan Cui <decui@...rosoft.com>
> ---
>  drivers/hv/connection.c   |  3 +--
>  drivers/hv/hyperv_vmbus.h |  2 ++
>  drivers/hv/vmbus_drv.c    | 50
> +++++++++++++++++++++++++++++++++++++++++++++++
>  3 files changed, 53 insertions(+), 2 deletions(-)
> 

Reviewed-by: Michael Kelley <mikelley@...rosoft.com>