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acpi/processor: Check for duplicate processor ids at hotplug time 

The check for duplicate processor ids happens at boot time based on the
ACPI table contents, but the final sanity checks for a processor happen
at hotplug time.

At hotplug time, where the physical information is available, which might
differ from the ACPI table information, a check for duplicate processor
ids is missing.

Add it to the hotplug checks and rename the function so it better
reflects its purpose.

Signed-off-by: Dou Liyang <douly.fnst@cn.fujitsu.com>
Tested-by: Xiaolong Ye <xiaolong.ye@intel.com>
Cc: rjw@rjwysocki.net
Cc: linux-acpi@vger.kernel.org
Cc: guzheng1@huawei.com
Cc: izumi.taku@jp.fujitsu.com
Cc: lenb@kernel.org
Link: http://lkml.kernel.org/r/1488528147-2279-6-git-send-email-douly.fnst@cn.fujitsu.com
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
This commit is contained in:
Dou Liyang 2017-03-03 16:02:27 +08:00 committed by Thomas Gleixner
parent 8c8cb30f49
commit a77d6cd968
2 changed files with 11 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

13
drivers/acpi/acpi_processor.c
View File

@ -280,6 +280,13 @@ static int acpi_processor_get_info(struct acpi_device *device)
pr->acpi_id = value;
}
if (acpi_duplicate_processor_id(pr->acpi_id)) {
dev_err(&device->dev,
"Failed to get unique processor _UID (0x%x)\n",
pr->acpi_id);
return -ENODEV;
}
pr->phys_id = acpi_get_phys_id(pr->handle, device_declaration,
pr->acpi_id);
if (invalid_phys_cpuid(pr->phys_id))
@ -580,7 +587,7 @@ static struct acpi_scan_handler processor_container_handler = {
static int nr_unique_ids __initdata;
/* The number of the duplicate processor IDs */
static int nr_duplicate_ids __initdata;
static int nr_duplicate_ids;
/* Used to store the unique processor IDs */
static int unique_processor_ids[] __initdata = {
@ -588,7 +595,7 @@ static int unique_processor_ids[] __initdata = {
};
/* Used to store the duplicate processor IDs */
static int duplicate_processor_ids[] __initdata = {
static int duplicate_processor_ids[] = {
[0 ... NR_CPUS - 1] = -1,
};
@ -679,7 +686,7 @@ void __init acpi_processor_check_duplicates(void)
NULL, NULL);
}
bool __init acpi_processor_validate_proc_id(int proc_id)
bool acpi_duplicate_processor_id(int proc_id)
{
int i;

2
include/linux/acpi.h
View File

@ -287,7 +287,7 @@ static inline bool invalid_phys_cpuid(phys_cpuid_t phys_id)
}
/* Validate the processor object's proc_id */
bool acpi_processor_validate_proc_id(int proc_id);
bool acpi_duplicate_processor_id(int proc_id);
#ifdef CONFIG_ACPI_HOTPLUG_CPU
/* Arch dependent functions for cpu hotplug support */