diff mbox

[1/1] x86, acpi: Fix wrong checking condition in acpi_register_lapic().

Message ID 1374543541-4451-1-git-send-email-tangchen@cn.fujitsu.com (mailing list archive)
State Not Applicable, archived
Headers show

Commit Message

tangchen July 23, 2013, 1:39 a.m. UTC
We wanted to check if the acpi id is out of range. It should be:
	if (id >= (MAX_LOCAL_APIC)).

Signed-off-by: Tang Chen <tangchen@cn.fujitsu.com>
---
 arch/x86/kernel/acpi/boot.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

Comments

Len Brown July 23, 2013, 1:38 a.m. UTC | #1
Reviewed-by: Len Brown <len.brown@intel.com>

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Ingo Molnar July 23, 2013, 7:39 a.m. UTC | #2
* Tang Chen <tangchen@cn.fujitsu.com> wrote:

> We wanted to check if the acpi id is out of range. It should be:
> 	if (id >= (MAX_LOCAL_APIC)).

Does this have any practical impact, or can it wait until v3.12?

> Signed-off-by: Tang Chen <tangchen@cn.fujitsu.com>
> ---
>  arch/x86/kernel/acpi/boot.c |    2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/arch/x86/kernel/acpi/boot.c b/arch/x86/kernel/acpi/boot.c
> index d81a972..2a15ae7 100644
> --- a/arch/x86/kernel/acpi/boot.c
> +++ b/arch/x86/kernel/acpi/boot.c
> @@ -199,7 +199,7 @@ static void __cpuinit acpi_register_lapic(int id, u8 enabled)
>  {
>  	unsigned int ver = 0;
>  
> -	if (id >= (MAX_LOCAL_APIC-1)) {
> +	if (id >= (MAX_LOCAL_APIC)) {

The parentheses are now superfluous.

Thanks,

	Ingo
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tangchen July 23, 2013, 7:55 a.m. UTC | #3
On 07/23/2013 03:39 PM, Ingo Molnar wrote:
>
> * Tang Chen<tangchen@cn.fujitsu.com>  wrote:
>
>> We wanted to check if the acpi id is out of range. It should be:
>> 	if (id>= (MAX_LOCAL_APIC)).
>
> Does this have any practical impact, or can it wait until v3.12?

I haven't tested out any impact now, just found it when reading the code.
We can wait until v3.12.

>
>> Signed-off-by: Tang Chen<tangchen@cn.fujitsu.com>
>> ---
>>   arch/x86/kernel/acpi/boot.c |    2 +-
>>   1 file changed, 1 insertion(+), 1 deletion(-)
>>
>> diff --git a/arch/x86/kernel/acpi/boot.c b/arch/x86/kernel/acpi/boot.c
>> index d81a972..2a15ae7 100644
>> --- a/arch/x86/kernel/acpi/boot.c
>> +++ b/arch/x86/kernel/acpi/boot.c
>> @@ -199,7 +199,7 @@ static void __cpuinit acpi_register_lapic(int id, u8 enabled)
>>   {
>>   	unsigned int ver = 0;
>>
>> -	if (id>= (MAX_LOCAL_APIC-1)) {
>> +	if (id>= (MAX_LOCAL_APIC)) {
>
> The parentheses are now superfluous.

Oh, yes. I'll send a new version without the parentheses.

Thanks.

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diff mbox

Patch

diff --git a/arch/x86/kernel/acpi/boot.c b/arch/x86/kernel/acpi/boot.c
index d81a972..2a15ae7 100644
--- a/arch/x86/kernel/acpi/boot.c
+++ b/arch/x86/kernel/acpi/boot.c
@@ -199,7 +199,7 @@  static void __cpuinit acpi_register_lapic(int id, u8 enabled)
 {
 	unsigned int ver = 0;
 
-	if (id >= (MAX_LOCAL_APIC-1)) {
+	if (id >= (MAX_LOCAL_APIC)) {
 		printk(KERN_INFO PREFIX "skipped apicid that is too big\n");
 		return;
 	}