Re: [STABLE][PATCH 4.4] thermal/core/fair share: Lock the thermal zone while looping over instances

[Lukasz Luba]

On 5/14/21 11:56 AM, Greg KH wrote:
> On Fri, May 14, 2021 at 11:49:16AM +0100, Lukasz Luba wrote:
> > commit fef05776eb02238dcad8d5514e666a42572c3f32 upstream.
> >
> > The tz->lock must be hold during the looping over the instances in that
> > thermal zone. This lock was missing in the governor code since the
> > beginning, so it's hard to point into a particular commit.
> >
> > CC: stable@xxxxxxxxxxxxxxx # 4.4
> > Signed-off-by: Lukasz Luba <lukasz.luba@xxxxxxx>
> > ---
> > Hi all,
> >
> > I've backported my patch which was sent to LKML:
> > https://lore.kernel.org/linux-pm/20210422153624.6074-2-lukasz.luba@xxxxxxx/
> >
> > The upstream patch failed while applying:
> > https://lore.kernel.org/stable/16206371483193@xxxxxxxxx/
> >
> > This patch should apply to stable v4.4.y, on top of stable tree branch:
> > linux-4.4.y which head was at:
> > commit 47127fcd287c ("Linux 4.4.268")
>
> What about 4.9, 4.14, 4.14, and 5.4 releases?  They need this fix as
> well, right?

s/4.14/4.19

Yes, I'm going to send them in next few hours after building and
testing.

Regards,
Lukasz