When maxcpus=X kernel argument is used, we parse the ACPI tables only for the first X cpus. The per-cpu ACPI data include the _PSD tables which gives information about related cpus. cppc_cpufreq and acpi-cpufreq parses the table once during init to deduce the related cpus. If a user brings a new cpu online after boot the related cpu data becomes incorrect. acpi_get_psd_map() in acpi_cppc.c returns error if it fails to find the parsed ACPI data for possible CPU resulting in cppc_cpufreq initialization failure. With this change we will probe all possible CPUs prior to cpufreq initialization, but will bring only setup_max_cpus online. nr_cpus kernel parameter can be used to restict even parsing per-cpu ACPI tables. Signed-off-by: Prashanth Prakash <pprakash@xxxxxxxxxxxxxx> --- drivers/acpi/acpi_processor.c | 5 ----- 1 file changed, 5 deletions(-) diff --git a/drivers/acpi/acpi_processor.c b/drivers/acpi/acpi_processor.c index 0143135..f098e25 100644 --- a/drivers/acpi/acpi_processor.c +++ b/drivers/acpi/acpi_processor.c @@ -388,11 +388,6 @@ static int acpi_processor_add(struct acpi_device *device, if (result) /* Processor is not physically present or unavailable */ return 0; -#ifdef CONFIG_SMP - if (pr->id >= setup_max_cpus && pr->id != 0) - return 0; -#endif - BUG_ON(pr->id >= nr_cpu_ids); /* -- Qualcomm Datacenter Technologies on behalf of Qualcomm Technologies, Inc. Qualcomm Technologies, Inc. is a member of the Code Aurora Forum, a Linux Foundation Collaborative Project. -- To unsubscribe from this list: send the line "unsubscribe linux-acpi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
