Request for inclusion of 7180dddf7c32c49975c7e7babf2b60ed450cb760 into 4.1 and 3.18

Request for inclusion of 7180dddf7c32c49975c7e7babf2b60ed450cb760 into 4.1 and 3.18

[Thomas Renninger]

Hi,

while double checking whether this on is needed for 3.12 (which it is not),
I realized that this easy patch, fixing a potential divide by zero bug,
patches nicely with only line offset into 4.1 and 3.18 latest stable kernel
branches.

So you might want to consider taking this one.

commit 7180dddf7c32c49975c7e7babf2b60ed450cb760
Author: Prarit Bhargava <prarit@redhat.com>
Date:   Mon Jun 15 13:43:29 2015 -0400

    intel_pstate: Fix overflow in busy_scaled due to long delay
    
    The kernel may delay interrupts for a long time which can result in timers
    being delayed. If this occurs the intel_pstate driver will crash with a
    divide by zero error:
    
    divide error: 0000 [#1] SMP
...

Re: Request for inclusion of 7180dddf7c32c49975c7e7babf2b60ed450cb760 into 4.1 and 3.18

[Greg KH]

On Tue, Oct 13, 2015 at 02:51:21PM +0200, Thomas Renninger wrote:
> Hi,
> 
> while double checking whether this on is needed for 3.12 (which it is not),
> I realized that this easy patch, fixing a potential divide by zero bug,
> patches nicely with only line offset into 4.1 and 3.18 latest stable kernel
> branches.
> 
> So you might want to consider taking this one.
> 
> commit 7180dddf7c32c49975c7e7babf2b60ed450cb760
> Author: Prarit Bhargava <prarit@redhat.com>
> Date:   Mon Jun 15 13:43:29 2015 -0400
> 
>     intel_pstate: Fix overflow in busy_scaled due to long delay
>     
>     The kernel may delay interrupts for a long time which can result in timers
>     being delayed. If this occurs the intel_pstate driver will crash with a
>     divide by zero error:
>     
>     divide error: 0000 [#1] SMP
> ...

Queued up for 4.1-stable, thanks.

greg k-h

Re: Request for inclusion of 7180dddf7c32c49975c7e7babf2b60ed450cb760 into 4.1 and 3.18

[Luis Henriques]

On Tue, Oct 13, 2015 at 02:51:21PM +0200, Thomas Renninger wrote:
> Hi,
> 
> while double checking whether this on is needed for 3.12 (which it is not),
> I realized that this easy patch, fixing a potential divide by zero bug,
> patches nicely with only line offset into 4.1 and 3.18 latest stable kernel
> branches.
> 
> So you might want to consider taking this one.
>

With some context adjustment, I am also picking it for the 3.16 kernel.

(I'm actually also picking fa30dff9a81e ("cpufreq: intel_pstate: Remove
unnecessary type casting in div_s64() call").)

Cheers,
--
Lu�s


> commit 7180dddf7c32c49975c7e7babf2b60ed450cb760
> Author: Prarit Bhargava <prarit@redhat.com>
> Date:   Mon Jun 15 13:43:29 2015 -0400
> 
>     intel_pstate: Fix overflow in busy_scaled due to long delay
>     
>     The kernel may delay interrupts for a long time which can result in timers
>     being delayed. If this occurs the intel_pstate driver will crash with a
>     divide by zero error:
>     
>     divide error: 0000 [#1] SMP
> ...
> --
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