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X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 04 Nov 2025 00:12:09.9707 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 15dae109-f1e4-4608-7663-08de1b36cc2b 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=[satlexmb07.amd.com] X-MS-Exchange-CrossTenant-AuthSource: CH1PEPF0000A347.namprd04.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: DS7PR12MB6360 The CXL RAS handlers do not currently log if the RAS registers are unmapped. This is needed in order to help debug CXL error handling. Update the CXL driver to log a warning message if the RAS register block is unmapped during RAS error handling. Signed-off-by: Terry Bowman Reviewed-by: Jonathan Cameron Reviewed-by: Kuppuswamy Sathyanarayanan Reviewed-by: Dave Jiang Reviewed-by: Ben Cheatham --- Chan ges in v12->v13: - Added Bens review-by --- drivers/cxl/core/ras.c | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-) diff --git a/drivers/cxl/core/ras.c b/drivers/cxl/core/ras.c index 72908f3ced77..0320c391f201 100644 --- a/drivers/cxl/core/ras.c +++ b/drivers/cxl/core/ras.c @@ -165,8 +165,10 @@ void cxl_handle_cor_ras(struct device *dev, void __iomem *ras_base) void __iomem *addr; u32 status; - if (!ras_base) + if (!ras_base) { + dev_warn_once(dev, "CXL RAS register block is not mapped"); return; + } addr = ras_base + CXL_RAS_CORRECTABLE_STATUS_OFFSET; status = readl(addr); @@ -204,8 +206,10 @@ bool cxl_handle_ras(struct device *dev, void __iomem *ras_base) u32 status; u32 fe; - if (!ras_base) + if (!ras_base) { + dev_warn_once(dev, "CXL RAS register block is not mapped"); return false; + } addr = ras_base + CXL_RAS_UNCORRECTABLE_STATUS_OFFSET; status = readl(addr); -- 2.34.1