From: Manivannan Sadhasivam <manivannan.sadhasivam@xxxxxxxxxx> [ Upstream commit cca94f1dd6d0a4c7e5c8190672f5747e3c00ddde ] 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. While at it, also sort the members of `struct qcom_llcc_config` to avoid any holes in-between. Cc: <stable@xxxxxxxxxxxxxxx> # 5.10 Reported-by: Steev Klimaszewski <steev@xxxxxxxx> Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@xxxxxxxxxx> Signed-off-by: Bjorn Andersson <andersson@xxxxxxxxxx> Link: https://lore.kernel.org/r/20230314080443.64635-15-manivannan.sadhasivam@xxxxxxxxxx Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx> --- drivers/soc/qcom/llcc-qcom.c | 24 +++++++++++++++++------- 1 file changed, 17 insertions(+), 7 deletions(-) diff --git a/drivers/soc/qcom/llcc-qcom.c b/drivers/soc/qcom/llcc-qcom.c index 63a08635fc159..d4cba3b3c56c4 100644 --- a/drivers/soc/qcom/llcc-qcom.c +++ b/drivers/soc/qcom/llcc-qcom.c @@ -101,10 +101,11 @@ struct llcc_slice_config { struct qcom_llcc_config { const struct llcc_slice_config *sct_data; - int size; - bool need_llcc_cfg; const u32 *reg_offset; const struct llcc_edac_reg_offset *edac_reg_offset; + int size; + bool need_llcc_cfg; + bool no_edac; }; enum llcc_reg_offset { @@ -401,6 +402,7 @@ static const struct qcom_llcc_config sdm845_cfg = { .need_llcc_cfg = false, .reg_offset = llcc_v1_reg_offset, .edac_reg_offset = &llcc_v1_edac_reg_offset, + .no_edac = true, }; static const struct qcom_llcc_config sm6350_cfg = { @@ -851,11 +853,19 @@ 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"); + /* + * On some platforms, the access to EDAC registers will be locked by + * the bootloader. So probing the EDAC driver will result in a crash. + * Hence, disable the creation of EDAC platform device for the + * problematic platforms. + */ + if (!cfg->no_edac) { + 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: -- 2.39.2
