On Tuesday, February 18, 2014 01:30:52 PM Stephen Warren wrote:
> On 02/17/2014 02:25 AM, Viresh Kumar wrote:
> > This patchset creates/calls cpufreq suspend/resume callbacks from
> > dpm_{suspend|resume}()
> > for handling suspend/resume of cpufreq governors and core.
> >
> > There are multiple problems that are fixed by this patch:
> > - Nishanth Menon (TI) found an interesting problem on his platform, OMAP.
> > His board
> > wasn't working well with suspend/resume as calls for removing non-boot
> > CPUs
> > was turning out into a call to drivers ->target() which then tries to play
> > with regulators. But regulators and their I2C bus were already suspended
> > and
> > this resulted in a failure. Many platforms have such problems, samsung,
> > tegra,
> > etc.. They solved it with driver specific PM notifiers where they used to
> > disable their driver's ->target() routine.
> > - Lan Tianyu (Intel) & Jinhyuk Choi (Broadcom) found an issue where tunables
> > configuration for clusters/sockets with non-boot CPUs was getting lost
> > after
> > suspend/resume, as we were notifying governors with
> > CPUFREQ_GOV_POLICY_EXIT on
> > removal of the last cpu for that policy and so deallocating memory for
> > tunables. This is fixed by this patch as we don't allow any operation on
> > governors after device suspend and before device resume now.
>
> The series,
> Tested-by: Stephen Warren <[email protected]>
Is this series necessary to fix bugs that you're seeing in 3.14-rc and if so,
the what bugs are they?
> Patch 7/7,
> Acked-by: Stephen Warren <[email protected]>
>
--
I speak only for myself.
Rafael J. Wysocki, Intel Open Source Technology Center.
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