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x-ptr=pass x-ptr-helo=vger.kernel.org x-ptr-lookup=vger.kernel.org; x-return-mx=pass smtp.domain=vger.kernel.org smtp.result=pass smtp_org.domain=kernel.org smtp_org.result=pass smtp_is_org_domain=no header.domain=microsoft.com header.result=pass header_is_org_domain=yes Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S968501AbeCSSBf (ORCPT ); Mon, 19 Mar 2018 14:01:35 -0400 Received: from mail-by2nam01on0116.outbound.protection.outlook.com ([104.47.34.116]:27376 "EHLO NAM01-BY2-obe.outbound.protection.outlook.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S965631AbeCSQEB (ORCPT ); Mon, 19 Mar 2018 12:04:01 -0400 From: Sasha Levin To: "linux-kernel@vger.kernel.org" , "stable@vger.kernel.org" CC: Christophe Leroy , Michael Ellerman , Sasha Levin Subject: [PATCH AUTOSEL for 4.9 190/281] powerpc/8xx: fix mpc8xx_get_irq() return on no irq Thread-Topic: [PATCH AUTOSEL for 4.9 190/281] powerpc/8xx: fix mpc8xx_get_irq() return on no irq Thread-Index: AQHTv5uP71oc4OyDhUe+C0GPqBVZ0w== Date: Mon, 19 Mar 2018 16:01:38 +0000 Message-ID: <20180319155742.13731-190-alexander.levin@microsoft.com> References: <20180319155742.13731-1-alexander.levin@microsoft.com> In-Reply-To: <20180319155742.13731-1-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;DM5PR2101MB1077;7:AYidZk95lqehUGh4DAjUTVA3cBK0JcgJ6JayvwNrzmd0WV6wXNHMldOD+qdlAuDHHKRkZ/KkGRyurkRgGVjqJiBYLeIHudVI69xrly13G4zvOnTu9Mc6A0v7nhmMR5dYtwT4+gWG+dVyG88/yFC9y7p7wxhSRzBsU7BAGtJkifIza0C2bhWudOqWcXMvxuyRmO68N4QJxT+zcOyO0R923tZD1FbqrNHT8n0ZNKqtaqVHW9mKVYvFshLaOXvGuQfF;20:9dEhMfMQ2ZJRO8AfXoozJEDJURbDsGoe2FV0U6q53s4FT8ep3ltCFOfY1GczRtbev+4lK/nJF5/4yot1B4nUaibpMmiZs3nlPQCn8+hfB1w2m9ljv+xdqe5mG6NTWqMks+PUgoGpC4uUa5+Zf6LE1XASzMPiIRA6MdBQDmdqxn0= x-ms-office365-filtering-ht: Tenant x-ms-office365-filtering-correlation-id: 4ec9d844-de4a-4cf1-e0af-08d58db30296 x-microsoft-antispam: UriScan:;BCL:0;PCL:0;RULEID:(7020095)(4652020)(48565401081)(5600026)(4604075)(3008032)(4534165)(4627221)(201703031133081)(201702281549075)(2017052603328)(7193020);SRVR:DM5PR2101MB1077; 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x-microsoft-antispam-message-info: PqZS0K9rua+flHVB29ZOTZGl1Ug4mirB7uBfSoaBLS3NFeV7sn8z2DSM9MJWbN5q59ki5HZSygwE3D1mpuAUEWBUHYDkaKZEsCFPMv6F1P0eGmAlo0sJH+jaFzNxuoXaCytaH2LlOqLODx6eECBzthzmvCkbG3fu3128EN+dlu3s8IN2rxcdbKj1O55uDtU74AwpHl9TU764EqtYOCGgGqAAzLE3pYyt2YV2Y0rKkLra+HFcNGLohgCs+dWyvATex8CiNy06lG0fXH+km7bfLzb6d+4o80bY/nN3rN1mO7oiH4FCJ48n8tX898ClunI+QP3zDThJNQihYKpKLaSXBA== 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: 4ec9d844-de4a-4cf1-e0af-08d58db30296 X-MS-Exchange-CrossTenant-originalarrivaltime: 19 Mar 2018 16:01:38.0760 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: 72f988bf-86f1-41af-91ab-2d7cd011db47 X-MS-Exchange-Transport-CrossTenantHeadersStamped: DM5PR2101MB1077 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: Christophe Leroy [ Upstream commit 3c29b6038828c1f4c9ecbfec14d4fc5e25f1c947 ] IRQ 0 is a valid HW interrupt. So get_irq() shall return 0 when there is no irq, instead of returning irq_linear_revmap(... ,0) Fixes: f2a0bd3753dad ("[POWERPC] 8xx: powerpc port of core CPM PIC") Signed-off-by: Christophe Leroy Signed-off-by: Michael Ellerman Signed-off-by: Sasha Levin --- arch/powerpc/sysdev/mpc8xx_pic.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/powerpc/sysdev/mpc8xx_pic.c b/arch/powerpc/sysdev/mpc8xx_= pic.c index 3e828b20c21e..2842f9d63d21 100644 --- a/arch/powerpc/sysdev/mpc8xx_pic.c +++ b/arch/powerpc/sysdev/mpc8xx_pic.c @@ -79,7 +79,7 @@ unsigned int mpc8xx_get_irq(void) irq =3D in_be32(&siu_reg->sc_sivec) >> 26; =20 if (irq =3D=3D PIC_VEC_SPURRIOUS) - irq =3D 0; + return 0; =20 return irq_linear_revmap(mpc8xx_pic_host, irq); =20 --=20 2.14.1