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From:   Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
To:     andersson@kernel.org, robh+dt@kernel.org,
        krzysztof.kozlowski+dt@linaro.org, bp@alien8.de,
        tony.luck@intel.com
Cc:     quic_saipraka@quicinc.com, konrad.dybcio@linaro.org,
        linux-arm-msm@vger.kernel.org, linux-kernel@vger.kernel.org,
        james.morse@arm.com, mchehab@kernel.org, rric@kernel.org,
        linux-edac@vger.kernel.org, quic_ppareek@quicinc.com,
        luca.weiss@fairphone.com, ahalaney@redhat.com, steev@kali.org,
        Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>,
        stable@vger.kernel.org
Subject: [PATCH v6 17/17] soc: qcom: llcc: Do not create EDAC platform device on SDM845
Date:   Wed, 18 Jan 2023 20:39:04 +0530
Message-Id: <20230118150904.26913-18-manivannan.sadhasivam@linaro.org>
In-Reply-To: <20230118150904.26913-1-manivannan.sadhasivam@linaro.org>
References: <20230118150904.26913-1-manivannan.sadhasivam@linaro.org>
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The platforms based on SDM845 SoC locks the access to EDAC registers in the
bootloader. So probing the EDAC driver will result in a crash. Hence,
disable the creation of EDAC platform device on all SDM845 devices.

The issue has been observed on Lenovo Yoga C630 and DB845c.

Cc: <stable@vger.kernel.org> # 5.10
Reported-by: Steev Klimaszewski <steev@kali.org>
Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
---
 drivers/soc/qcom/llcc-qcom.c | 17 ++++++++++++-----
 1 file changed, 12 insertions(+), 5 deletions(-)

diff --git a/drivers/soc/qcom/llcc-qcom.c b/drivers/soc/qcom/llcc-qcom.c
index 7b7c5a38bac6..8d840702df50 100644
--- a/drivers/soc/qcom/llcc-qcom.c
+++ b/drivers/soc/qcom/llcc-qcom.c
@@ -1012,11 +1012,18 @@ static int qcom_llcc_probe(struct platform_device *pdev)
 
 	drv_data->ecc_irq = platform_get_irq_optional(pdev, 0);
 
-	llcc_edac = platform_device_register_data(&pdev->dev,
-					"qcom_llcc_edac", -1, drv_data,
-					sizeof(*drv_data));
-	if (IS_ERR(llcc_edac))
-		dev_err(dev, "Failed to register llcc edac driver\n");
+	/*
+	 * The platforms based on SDM845 SoC locks the access to EDAC registers
+	 * in bootloader. So probing the EDAC driver will result in a crash.
+	 * Hence, disable the creation of EDAC platform device on SDM845.
+	 */
+	if (!of_device_is_compatible(dev->of_node, "qcom,sdm845-llcc")) {
+		llcc_edac = platform_device_register_data(&pdev->dev,
+						"qcom_llcc_edac", -1, drv_data,
+						sizeof(*drv_data));
+		if (IS_ERR(llcc_edac))
+			dev_err(dev, "Failed to register llcc edac driver\n");
+	}
 
 	return 0;
 err:
-- 
2.25.1