Re: [PATCH v4 2/3] iommu/tegra-smmu: Rework tegra_smmu_probe_device()

[Dmitry Osipenko]

02.10.2020 17:22, Dmitry Osipenko пишет:
>>  static int tegra_smmu_of_xlate(struct device *dev,
>>  			       struct of_phandle_args *args)
>>  {
>> +	struct platform_device *iommu_pdev = of_find_device_by_node(args->np);
>> +	struct tegra_mc *mc = platform_get_drvdata(iommu_pdev);
>>  	u32 id = args->args[0];
>>  
>> +	of_node_put(args->np);
>> +
>> +	if (!mc || !mc->smmu)
>> +		return -EPROBE_DEFER;
> platform_get_drvdata(NULL) will crash.
> 

Actually, platform_get_drvdata(NULL) can't happen. I overlooked this.