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Sat, 3 Feb 2018 13:02:12 -0500 Received: from mail-cys01nam02on0123.outbound.protection.outlook.com ([104.47.37.123]:2624 "EHLO NAM02-CY1-obe.outbound.protection.outlook.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1752821AbeBCSA5 (ORCPT ); Sat, 3 Feb 2018 13:00:57 -0500 From: Sasha Levin To: "linux-kernel@vger.kernel.org" , "stable@vger.kernel.org" CC: Karol Herbst , Ben Skeggs , Sasha Levin Subject: [PATCH AUTOSEL for 4.14 023/110] drm/nouveau/pci: do a msi rearm on init Thread-Topic: [PATCH AUTOSEL for 4.14 023/110] drm/nouveau/pci: do a msi rearm on init Thread-Index: AQHTnRjlWjwSOYA2+EWuaVFnDiGxjQ== Date: Sat, 3 Feb 2018 18:00:38 +0000 Message-ID: <20180203180015.29073-23-alexander.levin@microsoft.com> References: <20180203180015.29073-1-alexander.levin@microsoft.com> In-Reply-To: <20180203180015.29073-1-alexander.levin@microsoft.com> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [52.168.54.252] x-ms-publictraffictype: Email x-microsoft-exchange-diagnostics: 1;BL0PR2101MB1090;6:jv91weU8XkNPeQwxFYgKAgy746wHCTLgFvpjvfsSMp/4SvRj+2wdFR+ZI63gqsv4tkAyZ16Vvwl39SofNM8qkKa6ag9qfSPywCuxkM3HhISAO4069888rii9z1xNPNcYMLje1Pyzgkb1UqqzM/rpvZdQ+VJGzxix0LDxLzFUIztYZQQf0dZKUv6RGK/wNV1K3O49p73i1U16qYAPum4GCwayq6MmYBIHJhNdkUXORF89fZpWDq5XUQUqiGNzPnWTjPjc1Hfu7YRjybl6X/l+OE8rGn6iqnZ53lGcQvPWbGAL8qW6BVzRRbUgdz0+uZWqNdgtqmQThlFpUafFoUSmWiTYnwNtjfI+Bzo5EszxyMcmgzHQ/C85zEUQNXTVwq0a;5:J4G4wWId7vPLiBH0xsCRWfutTpjzIkxMsKzE8vwE3ETbk+0lp4U0D6ZpZzxkANdk5ZlHdQqsA574zDA+Z0zRwJatIjbcmUZoLXZOjx8jk5X3sCIrkMpAzRCxusM8JHZKJOvsJCria8imZVMMFVi5ItZYKsxHSGejfF8PiCJDePg=;24:IR5BFxEkcTGmAwNWCOSzwh3pEf3RYLIJREbtDC4QPnbaEoz6vjlOCogtUgbMZGg1ZMLWMmwgAETHKhPIID6lARiWKZzeiM9vWF4KvJroU/s=;7:4+cV0O1P1uZ/OA4aGQfAeUPDyyqd+HdExMsR7699gOtlpLPxRR4Zw6uXisd2Gzq47q8fo2gTR/m6CcK7G8cmiHzx2r7BTX9Lz4vNIFWrmFS3M/OArL+fxWu7qawwOYGkzpBtoQeOzccYJmISHIHJbj0/ZP/UE+y/zLffqdOIwQxSvCopKbf+YSwFzJnQLHuHsGF1CbB7ExztjiUDWJtMTvR3q5Okx+AdRT33CNZu1vTntkcr6/BOjv6n6XRimfR7 x-ms-office365-filtering-ht: Tenant x-ms-office365-filtering-correlation-id: 3c33d9e5-9339-490d-547f-08d56b300a15 x-microsoft-antispam: UriScan:;BCL:0;PCL:0;RULEID:(7020095)(4652020)(48565401081)(4534165)(4627221)(201703031133081)(201702281549075)(5600026)(4604075)(3008032)(2017052603307)(7193020);SRVR:BL0PR2101MB1090; 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authentication-results: spf=none (sender IP is ) smtp.mailfrom=Alexander.Levin@microsoft.com; x-microsoft-antispam-message-info: R7xQd0WlXYAkE0rDWKf16dvDuO3sRcJ5TPWcQb5lFql9vVexYTdQqBvOokkOlLOXDSvplTlVMgR38OsZHXB43w== spamdiagnosticoutput: 1:99 spamdiagnosticmetadata: NSPM Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 X-OriginatorOrg: microsoft.com X-MS-Exchange-CrossTenant-Network-Message-Id: 3c33d9e5-9339-490d-547f-08d56b300a15 X-MS-Exchange-CrossTenant-originalarrivaltime: 03 Feb 2018 18:00:38.5971 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: 72f988bf-86f1-41af-91ab-2d7cd011db47 X-MS-Exchange-Transport-CrossTenantHeadersStamped: BL0PR2101MB1090 Sender: stable-owner@vger.kernel.org X-Mailing-List: stable@vger.kernel.org X-getmail-retrieved-from-mailbox: INBOX X-Mailing-List: linux-kernel@vger.kernel.org List-ID: From: Karol Herbst [ Upstream commit a121027d2747168df0aac0c3da35509eea39f61c ] On my GP107 when I load nouveau after unloading it, for some reason the GPU stopped sending or the CPU stopped receiving interrupts if MSI was enabled. Doing a rearm once before getting any interrupts fixes this. Signed-off-by: Karol Herbst Reviewed-by: Thierry Reding Signed-off-by: Ben Skeggs Signed-off-by: Sasha Levin --- drivers/gpu/drm/nouveau/nvkm/subdev/pci/base.c | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/drivers/gpu/drm/nouveau/nvkm/subdev/pci/base.c b/drivers/gpu/d= rm/nouveau/nvkm/subdev/pci/base.c index a4cb82495cee..245c946ea661 100644 --- a/drivers/gpu/drm/nouveau/nvkm/subdev/pci/base.c +++ b/drivers/gpu/drm/nouveau/nvkm/subdev/pci/base.c @@ -136,6 +136,13 @@ nvkm_pci_init(struct nvkm_subdev *subdev) return ret; =20 pci->irq =3D pdev->irq; + + /* Ensure MSI interrupts are armed, for the case where there are + * already interrupts pending (for whatever reason) at load time. + */ + if (pci->msi) + pci->func->msi_rearm(pci); + return ret; } =20 --=20 2.11.0