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Sun, 12 Apr 2020 03:33:43 +0000 From: Michael Kelley To: Dexuan Cui , KY Srinivasan , Haiyang Zhang , Stephen Hemminger , "wei.liu@kernel.org" , "linux-hyperv@vger.kernel.org" , "linux-kernel@vger.kernel.org" , vkuznets CC: "stable@vger.kernel.org" Subject: RE: [PATCH v2] Drivers: hv: vmbus: Fix Suspend-to-Idle for Generation-2 VM Thread-Topic: [PATCH v2] Drivers: hv: vmbus: Fix Suspend-to-Idle for Generation-2 VM Thread-Index: AQHWD79fbnxkR6YcIUGt9U2cZJm+Yqh01nUQ Date: Sun, 12 Apr 2020 03:33:43 +0000 Message-ID: References: <1586581684-113131-1-git-send-email-decui@microsoft.com> In-Reply-To: <1586581684-113131-1-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; MSIP_Label_f42aa342-8706-4288-bd11-ebb85995028c_Owner=mikelley@ntdev.microsoft.com; MSIP_Label_f42aa342-8706-4288-bd11-ebb85995028c_SetDate=2020-04-12T03:33:41.1453932Z; 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received-spf: None (protection.outlook.com: microsoft.com does not designate permitted sender hosts) x-ms-exchange-senderadcheck: 1 x-microsoft-antispam: BCL:0; x-microsoft-antispam-message-info: yP2ayyKEpw2oHPi0FvoTAo9+q7j/PNPcQhYdMnu7TnlujUH+r9fdfRKCAJ3mcJpyQBs3Fy8HBHFjD6fH9ctBXXoyeCUA800YjYybsn6amCwAEe3KLYcAm4Yp6QRefPr0wczy/ZMmJEJXXwGPYjwUlBJbD2TMncqLL26kQQ5joxskRlBKjSqvPzXcq1U5P+tzJWQ+rqOprilB2AtmgC2AUAfoUy95dCZeRHILHDXIDzDfPxHbkJdMeKcVL6an5iHq8dzKDIatPrc/yxMXyTPg9h/fMJcG+1dtSDGzUHnsLgMULtvU4Zvyo2OoN1tkE7GVyiLcY0GK10yhfWyf+edPk99xxuWAtgu1WOMfgyQyGaQmcSC/iPJ+E9mt8JUCuZlrLdOPCzQ/Gdtp/o7EPv/Cc3m8KqaZbMAseBlo3IRRALNBPRgwC5o9ZZ49yxG8pyPu x-ms-exchange-antispam-messagedata: PrfkCnK7BdPBMnvl3mxAH7zGWyBPePtMTeNUWg5yoLt00ZXtJ9WUJZM8+ziXMR6LlSWGh5D5372f6S+FmSNL327noiPfAMKjSAUdKqBGGBUBmdKGuP0bGVAkGFjP4+c0eFACddP6n4Yk9cSJOgn0Rw== Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 X-OriginatorOrg: microsoft.com X-MS-Exchange-CrossTenant-Network-Message-Id: 66171226-b9ec-4da4-3b44-08d7de924d08 X-MS-Exchange-CrossTenant-originalarrivaltime: 12 Apr 2020 03:33:43.3841 (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: BAvcVVCyJFpnZ/GsdLR+DjUt4JDDQRp/ac/3Dhk3WrsklYqxPtx1hzrzTkB3oKXdPJBzdrKTPaf7DJPKAC3jSzZAiI+pcyQ7xU5CmltTVNo= X-MS-Exchange-Transport-CrossTenantHeadersStamped: MW2PR2101MB0987 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Dexuan Cui Sent: Friday, April 10, 2020 10:08 P= M >=20 > Before the hibernation patchset (e.g. f53335e3289f), in a Generation-2 > Linux VM on Hyper-V, the user can run "echo freeze > /sys/power/state" to > freeze the system, i.e. Suspend-to-Idle. The user can press the keyboard > or move the mouse to wake up the VM. >=20 > With the hibernation patchset, Linux VM on Hyper-V can hibernate to disk, > but Suspend-to-Idle is broken: when the synthetic keyboard/mouse are > suspended, there is no way to wake up the VM. >=20 > Fix the issue by not suspending and resuming the vmbus devices upon > Suspend-to-Idle. >=20 > Fixes: f53335e3289f ("Drivers: hv: vmbus: Suspend/resume the vmbus itself= for > hibernation") > Cc: stable@vger.kernel.org > Signed-off-by: Dexuan Cui > --- >=20 > Changes in v2: > Added "#define vmbus_suspend NULL", etc. for the case where > CONFIG_PM_SLEEP is not defined. > Many thanks to kbuild test robot for this! >=20 > drivers/hv/vmbus_drv.c | 43 ++++++++++++++++++++++++++++++++++--------- > 1 file changed, 34 insertions(+), 9 deletions(-) >=20 Reviewed-by: Michael Kelley