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author | Dou Liyang <douly.fnst@cn.fujitsu.com> | 2016-08-25 16:35:20 +0800 |
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committer | Thomas Gleixner <tglx@linutronix.de> | 2016-09-21 21:18:40 +0200 |
commit | fd74da217df7d4bd25e95411da64e0b92762842e (patch) | |
tree | e1286e0caf327a031a9d92d504af925524fe858d /drivers/acpi/processor_core.c | |
parent | 8e089eaa1999def4bb954caa91941f29b0672b6a (diff) | |
download | linux-fd74da217df7d4bd25e95411da64e0b92762842e.tar.gz linux-fd74da217df7d4bd25e95411da64e0b92762842e.tar.bz2 linux-fd74da217df7d4bd25e95411da64e0b92762842e.zip |
acpi: Validate processor id when mapping the processor
When we want to identify whether the proc_id is unreasonable or not, we
can call the "acpi_processor_validate_proc_id" function. It will search
in the duplicate IDs. If we find the proc_id in the IDs, we return true
to the call function. Conversely, the false represents available.
When we establish all possible cpuid <-> nodeid mapping to handle the
cpu hotplugs, we will use the proc_id from ACPI table.
We do validation when we get the proc_id. If the result is true, we
will stop the mapping.
[ tglx: Mark the new function __init ]
Signed-off-by: Dou Liyang <douly.fnst@cn.fujitsu.com>
Acked-by: Ingo Molnar <mingo@kernel.org>
Cc: mika.j.penttila@gmail.com
Cc: len.brown@intel.com
Cc: rafael@kernel.org
Cc: rjw@rjwysocki.net
Cc: yasu.isimatu@gmail.com
Cc: linux-mm@kvack.org
Cc: linux-acpi@vger.kernel.org
Cc: isimatu.yasuaki@jp.fujitsu.com
Cc: gongzhaogang@inspur.com
Cc: tj@kernel.org
Cc: izumi.taku@jp.fujitsu.com
Cc: cl@linux.com
Cc: chen.tang@easystack.cn
Cc: akpm@linux-foundation.org
Cc: kamezawa.hiroyu@jp.fujitsu.com
Cc: lenb@kernel.org
Link: http://lkml.kernel.org/r/1472114120-3281-8-git-send-email-douly.fnst@cn.fujitsu.com
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'drivers/acpi/processor_core.c')
-rw-r--r-- | drivers/acpi/processor_core.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/acpi/processor_core.c b/drivers/acpi/processor_core.c index 88019766a59a..9ac265f235b7 100644 --- a/drivers/acpi/processor_core.c +++ b/drivers/acpi/processor_core.c @@ -302,6 +302,10 @@ map_processor(acpi_handle handle, phys_cpuid_t *phys_id, int *cpuid) if (ACPI_FAILURE(status)) return false; acpi_id = object.processor.proc_id; + + /* validate the acpi_id */ + if(acpi_processor_validate_proc_id(acpi_id)) + return false; break; case ACPI_TYPE_DEVICE: status = acpi_evaluate_integer(handle, "_UID", NULL, &tmp); |