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Mon, 13 Apr 2026 16:14:27 -0700 (PDT) Received: from anarsoul-xps15.lan ([2001:569:7c09:b500:8461:f909:7a3b:1c4c]) by smtp.gmail.com with ESMTPSA id d9443c01a7336-2b2d4f43994sm129635805ad.80.2026.04.13.16.14.26 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 13 Apr 2026 16:14:27 -0700 (PDT) From: Vasily Khoruzhick To: Tony Luck , Borislav Petkov , linux-edac@vger.kernel.org, linux-kernel@vger.kernel.org Cc: Vasily Khoruzhick , stable@vger.kernel.org Subject: [PATCH] EDAC/i10nm: don't fail probing if ADXL is missing Date: Mon, 13 Apr 2026 16:13:53 -0700 Message-ID: <20260413231413.73987-1-anarsoul@gmail.com> X-Mailer: git-send-email 2.53.0 Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit From: Vasily Khoruzhick ADXL is not present in Coreboot- or Slimbootloader-based BIOSes and as result, the driver fails to probe there. i10nm does not require ADXL for decoding errors since commit 2738c69a8813 ("EDAC/i10nm: Add driver decoder for Ice Lake and Tremont CPUs"), so we can just switch to driver decoding when it's not present. Cc: stable@vger.kernel.org # v6.1+ Signed-off-by: Vasily Khoruzhick --- drivers/edac/i10nm_base.c | 14 +++++++++++--- 1 file changed, 11 insertions(+), 3 deletions(-) diff --git a/drivers/edac/i10nm_base.c b/drivers/edac/i10nm_base.c index 89b3e8cc38b1..69a4a255e4c8 100644 --- a/drivers/edac/i10nm_base.c +++ b/drivers/edac/i10nm_base.c @@ -79,6 +79,7 @@ static struct res_config *res_cfg; static int retry_rd_err_log; static int decoding_via_mca; static bool mem_cfg_2lm; +static bool no_adxl; static struct reg_rrl icx_reg_rrl_ddr = { .set_num = 2, @@ -1208,8 +1209,14 @@ static int __init i10nm_init(void) } rc = skx_adxl_get(); - if (rc) - goto fail; + if (rc) { + /* Decoding errors via MCA banks for 2LM isn't supported yet */ + if (rc != -ENODEV || mem_cfg_2lm) + goto fail; + i10nm_printk(KERN_INFO, "ADXL not found, falling back to MCA-based decoding.\n"); + no_adxl = true; + decoding_via_mca = true; + } opstate_init(); mce_register_decode_chain(&i10nm_mce_dec); @@ -1243,7 +1250,8 @@ static void __exit i10nm_exit(void) skx_teardown_debug(); mce_unregister_decode_chain(&i10nm_mce_dec); - skx_adxl_put(); + if (!no_adxl) + skx_adxl_put(); skx_remove(); } -- 2.53.0