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Received-SPF: Pass (protection.outlook.com: domain of amd.com designates 165.204.84.17 as permitted sender) receiver=protection.outlook.com; client-ip=165.204.84.17; helo=SATLEXMB04.amd.com; pr=C Received: from SATLEXMB04.amd.com (165.204.84.17) by CY4PEPF0000EE35.mail.protection.outlook.com (10.167.242.41) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.20.6838.22 via Frontend Transport; Fri, 20 Oct 2023 03:38:34 +0000 Received: from AUS-P9-MLIMONCI.amd.com (10.180.168.240) by SATLEXMB04.amd.com (10.181.40.145) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2507.27; Thu, 19 Oct 2023 22:38:32 -0500 From: Mario Limonciello To: , , , CC: , , , , , Mario Limonciello Subject: [PATCH 2/2] x86/irq/i8259: Configure null pic to have one legacy IRQ Date: Thu, 19 Oct 2023 22:38:06 -0500 Message-ID: <20231020033806.88063-2-mario.limonciello@amd.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20231020033806.88063-1-mario.limonciello@amd.com> References: <20231020033806.88063-1-mario.limonciello@amd.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain X-Originating-IP: [10.180.168.240] X-ClientProxiedBy: SATLEXMB03.amd.com (10.181.40.144) To SATLEXMB04.amd.com (10.181.40.145) X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: CY4PEPF0000EE35:EE_|PH7PR12MB7939:EE_ X-MS-Office365-Filtering-Correlation-Id: 2672187f-1f53-4e9b-073a-08dbd11e0975 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; 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X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 20 Oct 2023 03:38:34.0008 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 2672187f-1f53-4e9b-073a-08dbd11e0975 X-MS-Exchange-CrossTenant-Id: 3dd8961f-e488-4e60-8e11-a82d994e183d X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=3dd8961f-e488-4e60-8e11-a82d994e183d;Ip=[165.204.84.17];Helo=[SATLEXMB04.amd.com] X-MS-Exchange-CrossTenant-AuthSource: CY4PEPF0000EE35.namprd05.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: PH7PR12MB7939 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org If the system is configured with the NULL PIC, the system should still be able to set up the timer IRQ at IRQ 0. Link: https://lore.kernel.org/linux-kernel/878r7z4kb4.ffs@tglx/ Signed-off-by: Mario Limonciello --- arch/x86/kernel/i8259.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/x86/kernel/i8259.c b/arch/x86/kernel/i8259.c index 43c1c24e934b..885687e64e4e 100644 --- a/arch/x86/kernel/i8259.c +++ b/arch/x86/kernel/i8259.c @@ -424,7 +424,7 @@ static int legacy_pic_probe(void) } struct legacy_pic null_legacy_pic = { - .nr_legacy_irqs = 0, + .nr_legacy_irqs = 1, .chip = &dummy_irq_chip, .mask = legacy_pic_uint_noop, .unmask = legacy_pic_uint_noop, -- 2.34.1