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Peter Anvin" , "open list:PCI SUBSYSTEM" , "open list:X86 ARCHITECTURE (32-BIT AND 64-BIT)" , "open list:LIBATA SUBSYSTEM (Serial and Parallel ATA drivers)" , Mario Limonciello , Arthur Husband Subject: [PATCH v2 2/2] Revert "ata: ahci: force 32-bit DMA for JMicron JMB582/JMB585" Date: Tue, 8 Sep 2026 14:06:00 -0500 Message-ID: <20260908190600.226485-3-mario.limonciello@amd.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20260908190600.226485-1-mario.limonciello@amd.com> References: <20260908190600.226485-1-mario.limonciello@amd.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain X-ClientProxiedBy: satlexmb08.amd.com (10.181.42.217) To satlexmb09.amd.com (10.181.42.218) X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: BN2PEPF000044A8:EE_|BN5PR12MB9511:EE_ X-MS-Office365-Filtering-Correlation-Id: 9bc1e3e3-3c25-4f00-03da-08df0ddc445a X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|23010399003|1800799024|36860700016|82310400026|376014|7416014|10067099003|6133799003|18002099003|22082099003|11063799006|56012099006; X-Microsoft-Antispam-Message-Info: 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 X-Forefront-Antispam-Report: CIP:165.204.84.17;CTRY:US;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:satlexmb08.amd.com;PTR:InfoDomainNonexistent;CAT:NONE;SFS:(13230040)(23010399003)(1800799024)(36860700016)(82310400026)(376014)(7416014)(10067099003)(6133799003)(18002099003)(22082099003)(11063799006)(56012099006);DIR:OUT;SFP:1101; X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: WO9fkycmxmVLby0aKEt3tyYx6uD54fIxWgRpqminV2TPkdUkeQzvDdgZ1t3hGVGke8wLIZyR0pplVn+nWSrse1weOF2qw/5GrBJ6jzXYGT4X7Pf46joT3ZiKlsrj0g782bvCnK6UFCK0FKG12g70PQXUflNm/KH/PK/d53E8Vv2iLKmFZBtfyQtOdhSm0r3+TUPoxjVcqYawYSrSU1fJ1J89aFtF9Hp4u965sE2COdmF3ONf0QdpYKva0maendpcaDqsmwuV2ZkOpN92TpCeAR9Bu4RtU0qhk5s4TS8aNpbwan/Jm2k1EHn/NJcf5Y/+rBvhJ6V56ZG59f6UsIX9xN8G0JmsNcMkHhfouermopXDCJOSmEam5C6dAWQWwSQXDr+7GCSQ0sBg1Y4IkRrP3lMo4xcdMxznK1igP6+Lm14xeN3AZuuiKjS1H8YYQ+Vg X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 08 Sep 2026 19:06:20.0181 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 9bc1e3e3-3c25-4f00-03da-08df0ddc445a 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=[satlexmb08.amd.com] X-MS-Exchange-CrossTenant-AuthSource: BN2PEPF000044A8.namprd04.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: BN5PR12MB9511 This reverts commit 105c42566a550e2d05fc14f763216a8765ee5d0e. The issue is actually a problem with BIOS configuaration of PCIe root ports, enabling a feature that causes problems with 64-bit DMA. It is fixed by adjusting the kernel adjusting the configuration of those root ports. Cc: Arthur Husband Signed-off-by: Mario Limonciello --- drivers/ata/ahci.c | 18 ------------------ 1 file changed, 18 deletions(-) diff --git a/drivers/ata/ahci.c b/drivers/ata/ahci.c index 9b8c0935001cb..bffe50a109b88 100644 --- a/drivers/ata/ahci.c +++ b/drivers/ata/ahci.c @@ -68,7 +68,6 @@ enum board_ids { /* board IDs for specific chipsets in alphabetical order */ board_ahci_al, board_ahci_avn, - board_ahci_jmb585, board_ahci_mcp65, board_ahci_mcp77, board_ahci_mcp89, @@ -213,15 +212,6 @@ static const struct ata_port_info ahci_port_info[] = { .udma_mask = ATA_UDMA6, .port_ops = &ahci_avn_ops, }, - /* JMicron JMB582/585: 64-bit DMA is broken, force 32-bit */ - [board_ahci_jmb585] = { - AHCI_HFLAGS (AHCI_HFLAG_IGN_IRQ_IF_ERR | - AHCI_HFLAG_32BIT_ONLY), - .flags = AHCI_FLAG_COMMON, - .pio_mask = ATA_PIO4, - .udma_mask = ATA_UDMA6, - .port_ops = &ahci_ops, - }, [board_ahci_mcp65] = { AHCI_HFLAGS (AHCI_HFLAG_NO_FPDMA_AA | AHCI_HFLAG_NO_PMP | AHCI_HFLAG_YES_NCQ), @@ -954,14 +944,6 @@ static const struct pci_device_id ahci_pci_tbl[] = { /* Elkhart Lake AHCI */ PCI_VDEVICE(INTEL, 0x4b63), .driver_data = board_ahci_pcs_quirk, - }, { - /* JMicron JMB582/585: force 32-bit DMA (broken 64-bit implementation) */ - PCI_VDEVICE(JMICRON, 0x0582), - .driver_data = board_ahci_jmb585, - - }, { - PCI_VDEVICE(JMICRON, 0x0585), - .driver_data = board_ahci_jmb585, }, { /* JMicron 360/1/3/5/6, match class to avoid IDE function */ PCI_DEVICE(PCI_VENDOR_ID_JMICRON, PCI_ANY_ID), -- 2.43.0