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: