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Wed, 7 Aug 2019 15:22:49 +0000 From: Michael Kelley To: Dexuan Cui , "linux-hyperv@vger.kernel.org" , "gregkh@linuxfoundation.org" , Stephen Hemminger , Sasha Levin , "sashal@kernel.org" , Haiyang Zhang , KY Srinivasan , "tglx@linutronix.de" CC: "linux-kernel@vger.kernel.org" Subject: RE: [PATCH v2 6/7] Drivers: hv: vmbus: Suspend/resume the vmbus itself for hibernation Thread-Topic: [PATCH v2 6/7] Drivers: hv: vmbus: Suspend/resume the vmbus itself for hibernation Thread-Index: AQHVR8iruWjeXMDDo0mhtEN+e0v9pabv2CsQ Date: Wed, 7 Aug 2019 15:22:49 +0000 Message-ID: References: <1564595464-56520-1-git-send-email-decui@microsoft.com> <1564595464-56520-7-git-send-email-decui@microsoft.com> In-Reply-To: <1564595464-56520-7-git-send-email-decui@microsoft.com> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: msip_labels: MSIP_Label_f42aa342-8706-4288-bd11-ebb85995028c_Enabled=True; MSIP_Label_f42aa342-8706-4288-bd11-ebb85995028c_SiteId=72f988bf-86f1-41af-91ab-2d7cd011db47; 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charset="us-ascii" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 X-OriginatorOrg: microsoft.com X-MS-Exchange-CrossTenant-Network-Message-Id: b82d04fc-53bc-46ae-a4d2-08d71b4b1b67 X-MS-Exchange-CrossTenant-originalarrivaltime: 07 Aug 2019 15:22:49.1689 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: 72f988bf-86f1-41af-91ab-2d7cd011db47 X-MS-Exchange-CrossTenant-mailboxtype: HOSTED X-MS-Exchange-CrossTenant-userprincipalname: SpaTaWASPnuaj9+BU5F2whEut5xdHvKcugnecJ/3oYCN5L/incxkT+hlT1TuNxIGP2wUdC++pbplE6yEzrRORJYcFdbAjYNepcXApC2K9BQ= X-MS-Exchange-Transport-CrossTenantHeadersStamped: DM5PR21MB0748 Sender: linux-hyperv-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-hyperv@vger.kernel.org From: Dexuan Cui Sent: Wednesday, July 31, 2019 10:52= AM >=20 > Before Linux enters hibernation, it sends the CHANNELMSG_UNLOAD message t= o > 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. >=20 > Signed-off-by: Dexuan Cui > --- > drivers/hv/connection.c | 3 +-- > drivers/hv/hyperv_vmbus.h | 2 ++ > drivers/hv/vmbus_drv.c | 50 > +++++++++++++++++++++++++++++++++++++++++++++++ > 3 files changed, 53 insertions(+), 2 deletions(-) >=20 Reviewed-by: Michael Kelley