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Wed, 4 Sep 2019 16:45:18 +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 v4 12/12] Drivers: hv: vmbus: Resume after fixing up old primary channels Thread-Topic: [PATCH v4 12/12] Drivers: hv: vmbus: Resume after fixing up old primary channels Thread-Index: AQHVYe3OX2xdqssLhU64Vvbm5PnvIacbvDcg Date: Wed, 4 Sep 2019 16:45:17 +0000 Message-ID: References: <1567470139-119355-1-git-send-email-decui@microsoft.com> <1567470139-119355-13-git-send-email-decui@microsoft.com> In-Reply-To: <1567470139-119355-13-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: 95f3ac7f-4916-40ae-14dc-08d73157450a X-MS-Exchange-CrossTenant-originalarrivaltime: 04 Sep 2019 16:45:17.6883 (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: 1aSYdP16tXe19PmHdI/FYTH1mbhnc3y18dnsr2yIvz5Ka5Svn8fFU4WYcFm74lLXsfCV581VY4oUDVA9bhq3JaniM3YTSD5NC5LfIw7Rw5I= X-MS-Exchange-Transport-CrossTenantHeadersStamped: DM5PR21MB0794 Sender: linux-hyperv-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-hyperv@vger.kernel.org From: Dexuan Cui Sent: Monday, September 2, 2019 5:23= PM >=20 > When the host re-offers the primary channels upon resume, the host only > guarantees the Instance GUID doesn't change, so vmbus_bus_suspend() > should invalidate channel->offermsg.child_relid and figure out the > number of primary channels that need to be fixed up upon resume. >=20 > Upon resume, vmbus_onoffer() finds the old channel structs, and maps > the new offers to the old channels, and fixes up the old structs, > and finally the resume callbacks of the VSC drivers will re-open > the channels. >=20 > Signed-off-by: Dexuan Cui > --- > drivers/hv/channel_mgmt.c | 85 ++++++++++++++++++++++++++++++++++++-----= ------ > drivers/hv/connection.c | 2 ++ > drivers/hv/hyperv_vmbus.h | 14 ++++++++ > drivers/hv/vmbus_drv.c | 17 ++++++++++ > include/linux/hyperv.h | 3 ++ > 5 files changed, 101 insertions(+), 20 deletions(-) >=20 Reviewed-by: Michael Kelley