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Thu, 6 Aug 2020 16:23:07 +0000 From: Michael Kelley To: linux-kernel@vger.kernel.org, vkuznets@redhat.com, kys@microsoft.com, sthemmin@microsoft.com, wei.liu@kernel.org, linux-hyperv@vger.kernel.org Cc: mikelley@microsoft.com Subject: [PATCH 1/1] Drivers: hv: vmbus: Only notify Hyper-V for die events that are oops Date: Thu, 6 Aug 2020 09:22:15 -0700 Message-Id: <1596730935-11564-1-git-send-email-mikelley@microsoft.com> X-Mailer: git-send-email 1.8.3.1 Content-Type: text/plain X-ClientProxiedBy: CO2PR05CA0063.namprd05.prod.outlook.com (2603:10b6:102:2::31) To BN7PR21MB1636.namprd21.prod.outlook.com (2603:10b6:406:b8::32) MIME-Version: 1.0 X-MS-Exchange-MessageSentRepresentingType: 1 Received: from mhkdev.corp.microsoft.com (131.107.147.16) by CO2PR05CA0063.namprd05.prod.outlook.com (2603:10b6:102:2::31) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.3283.5 via Frontend Transport; Thu, 6 Aug 2020 16:23:06 +0000 X-Mailer: git-send-email 1.8.3.1 X-Originating-IP: [131.107.147.16] X-MS-PublicTrafficType: Email X-MS-Office365-Filtering-HT: Tenant X-MS-Office365-Filtering-Correlation-Id: 50243b20-6b60-4873-b696-08d83a250091 X-MS-TrafficTypeDiagnostic: BN6PR21MB0788: X-MS-Exchange-Transport-Forked: True X-LD-Processed: 72f988bf-86f1-41af-91ab-2d7cd011db47,ExtAddr X-Microsoft-Antispam-PRVS: X-MS-Oob-TLC-OOBClassifiers: OLM:1107; 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But this results in false panic notifications for various user space traps that are die events. Fix this by ignoring die events that aren't oops. Fixes: 510f7aef65bb ("Drivers: hv: vmbus: prefer 'die' notification chain to 'panic'") Signed-off-by: Michael Kelley --- drivers/hv/vmbus_drv.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/drivers/hv/vmbus_drv.c b/drivers/hv/vmbus_drv.c index b50081c..910b6e9 100644 --- a/drivers/hv/vmbus_drv.c +++ b/drivers/hv/vmbus_drv.c @@ -86,6 +86,10 @@ static int hyperv_die_event(struct notifier_block *nb, unsigned long val, struct die_args *die = (struct die_args *)args; struct pt_regs *regs = die->regs; + /* Don't notify Hyper-V if the die event is other than oops */ + if (val != DIE_OOPS) + return NOTIFY_DONE; + /* * Hyper-V should be notified only once about a panic. If we will be * doing hyperv_report_panic_msg() later with kmsg data, don't do -- 1.8.3.1