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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=satlexmb07.amd.com; pr=C Received: from satlexmb07.amd.com (165.204.84.17) by BN3PEPF0000B372.mail.protection.outlook.com (10.167.243.169) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.21.496.3 via Frontend Transport; Mon, 28 Sep 2026 18:09:56 +0000 Received: from airavat.amd.com (10.180.168.240) by satlexmb07.amd.com (10.181.42.216) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.2562.49; Mon, 28 Sep 2026 13:09:53 -0500 From: Vishal Badole To: , , , , CC: Vishal Badole , Subject: [PATCH v2 1/2] EDAC/amd64: Mask UMC chip select to the four implemented selects Date: Mon, 28 Sep 2026 23:39:34 +0530 Message-ID: <20260928180935.472319-2-Vishal.Badole@amd.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20260928180935.472319-1-Vishal.Badole@amd.com> References: <20260928180935.472319-1-Vishal.Badole@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 satlexmb07.amd.com (10.181.42.216) X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: BN3PEPF0000B372:EE_|DM4PR12MB7575:EE_ X-MS-Office365-Filtering-Correlation-Id: 0aafc1d6-7eba-4684-d218-08df1d8bb3ae X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|1800799024|82310400026|376014|23010399003|36860700016|10067099003|11063799006|56012099006|18002099003|22082099003; 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Only four have ever been implemented, and newer products document this as MCA_SYND_UMC[1:0] = Chip Select. Since only four csrows are allocated, a syndrome with bit 2 set decodes to an out-of-range csrow and trips: EDAC MC0: INTERNAL ERROR: csrow value is out of range (5 >= 4) Mask with 0x3 to match the four implemented chip selects. Fixes: 713ad54675fd ("EDAC, amd64: Define and register UMC error decode function") Cc: Suggested-by: Yazen Ghannam Signed-off-by: Vishal Badole Reviewed-by: Yazen Ghannam --- drivers/edac/amd64_edac.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/edac/amd64_edac.c b/drivers/edac/amd64_edac.c index 475235c402e8..ec4cc306b726 100644 --- a/drivers/edac/amd64_edac.c +++ b/drivers/edac/amd64_edac.c @@ -2802,7 +2802,7 @@ static inline void decode_bus_error(int node_id, struct mce *m) static void umc_get_err_info(struct mce *m, struct err_info *err) { err->channel = (m->ipid & GENMASK(31, 0)) >> 20; - err->csrow = m->synd & 0x7; + err->csrow = m->synd & 0x3; } static void decode_umc_error(int node_id, struct mce *m) -- 2.34.1