Mailing List Archive: [PATCH 1/2] cpuidle: psci: Fix regression leading to no genpd governor

[PATCH 1/2] cpuidle: psci: Fix regression leading to no genpd governor

May 14, 2022, 10:15 AM

Post #1 of 5 (68 views)

While factoring out the PM domain related code from PSCI domain driver into
a set of library functions, a regression when initializing the genpds got
introduced. More precisely, we fail to assign a genpd governor, so let's
fix this.

Fixes: 9d976d6721df ("cpuidle: Factor-out power domain related code from PSCI domain driver")
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
---
drivers/cpuidle/cpuidle-psci-domain.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/cpuidle/cpuidle-psci-domain.c b/drivers/cpuidle/cpuidle-psci-domain.c
index 755bbdfc5b82..3db4fca1172b 100644
--- a/drivers/cpuidle/cpuidle-psci-domain.c
+++ b/drivers/cpuidle/cpuidle-psci-domain.c
@@ -52,7 +52,7 @@ static int psci_pd_init(struct device_node *np, bool use_osi)
struct generic_pm_domain *pd;
struct psci_pd_provider *pd_provider;
struct dev_power_governor *pd_gov;
- int ret = -ENOMEM, state_count = 0;
+ int ret = -ENOMEM;

pd = dt_idle_pd_alloc(np, psci_dt_parse_state_node);
if (!pd)
@@ -71,7 +71,7 @@ static int psci_pd_init(struct device_node *np, bool use_osi)
pd->flags |= GENPD_FLAG_ALWAYS_ON;

/* Use governor for CPU PM domains if it has some states to manage. */
- pd_gov = state_count > 0 ? &pm_domain_cpu_gov : NULL;
+ pd_gov = pd->states ? &pm_domain_cpu_gov : NULL;

ret = pm_genpd_init(pd, pd_gov, false);
if (ret)
--
2.25.1

Re: [PATCH 1/2] cpuidle: psci: Fix regression leading to no genpd governor [ In reply to ]

anup at brainfault

May 14, 2022, 10:15 AM

Post #2 of 5 (68 views)

Permalink

On Sat, May 14, 2022 at 8:50 PM Ulf Hansson <ulf.hansson@linaro.org> wrote:
>
> While factoring out the PM domain related code from PSCI domain driver into
> a set of library functions, a regression when initializing the genpds got
> introduced. More precisely, we fail to assign a genpd governor, so let's
> fix this.
>
> Fixes: 9d976d6721df ("cpuidle: Factor-out power domain related code from PSCI domain driver")
> Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>

Looks good to me.

Reviewed-by: Anup Patel <anup@brainfault.org>

Regards,
Anup

> ---
> drivers/cpuidle/cpuidle-psci-domain.c | 4 ++--
> 1 file changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/cpuidle/cpuidle-psci-domain.c b/drivers/cpuidle/cpuidle-psci-domain.c
> index 755bbdfc5b82..3db4fca1172b 100644
> --- a/drivers/cpuidle/cpuidle-psci-domain.c
> +++ b/drivers/cpuidle/cpuidle-psci-domain.c
> @@ -52,7 +52,7 @@ static int psci_pd_init(struct device_node *np, bool use_osi)
> struct generic_pm_domain *pd;
> struct psci_pd_provider *pd_provider;
> struct dev_power_governor *pd_gov;
> - int ret = -ENOMEM, state_count = 0;
> + int ret = -ENOMEM;
>
> pd = dt_idle_pd_alloc(np, psci_dt_parse_state_node);
> if (!pd)
> @@ -71,7 +71,7 @@ static int psci_pd_init(struct device_node *np, bool use_osi)
> pd->flags |= GENPD_FLAG_ALWAYS_ON;
>
> /* Use governor for CPU PM domains if it has some states to manage. */
> - pd_gov = state_count > 0 ? &pm_domain_cpu_gov : NULL;
> + pd_gov = pd->states ? &pm_domain_cpu_gov : NULL;
>
> ret = pm_genpd_init(pd, pd_gov, false);
> if (ret)
> --
> 2.25.1
>

Re: [PATCH 1/2] cpuidle: psci: Fix regression leading to no genpd governor [ In reply to ]

rafael at kernel

May 18, 2022, 12:15 PM

Post #3 of 5 (68 views)

Permalink

On Sat, May 14, 2022 at 6:49 PM Anup Patel <anup@brainfault.org> wrote:
>
> On Sat, May 14, 2022 at 8:50 PM Ulf Hansson <ulf.hansson@linaro.org> wrote:
> >
> > While factoring out the PM domain related code from PSCI domain driver into
> > a set of library functions, a regression when initializing the genpds got
> > introduced. More precisely, we fail to assign a genpd governor, so let's
> > fix this.
> >
> > Fixes: 9d976d6721df ("cpuidle: Factor-out power domain related code from PSCI domain driver")
> > Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
>
> Looks good to me.
>
> Reviewed-by: Anup Patel <anup@brainfault.org>
>

Ulf, do you want me to take this lot or is it going to be handled elsewhere?

> > ---
> > drivers/cpuidle/cpuidle-psci-domain.c | 4 ++--
> > 1 file changed, 2 insertions(+), 2 deletions(-)
> >
> > diff --git a/drivers/cpuidle/cpuidle-psci-domain.c b/drivers/cpuidle/cpuidle-psci-domain.c
> > index 755bbdfc5b82..3db4fca1172b 100644
> > --- a/drivers/cpuidle/cpuidle-psci-domain.c
> > +++ b/drivers/cpuidle/cpuidle-psci-domain.c
> > @@ -52,7 +52,7 @@ static int psci_pd_init(struct device_node *np, bool use_osi)
> > struct generic_pm_domain *pd;
> > struct psci_pd_provider *pd_provider;
> > struct dev_power_governor *pd_gov;
> > - int ret = -ENOMEM, state_count = 0;
> > + int ret = -ENOMEM;
> >
> > pd = dt_idle_pd_alloc(np, psci_dt_parse_state_node);
> > if (!pd)
> > @@ -71,7 +71,7 @@ static int psci_pd_init(struct device_node *np, bool use_osi)
> > pd->flags |= GENPD_FLAG_ALWAYS_ON;
> >
> > /* Use governor for CPU PM domains if it has some states to manage. */
> > - pd_gov = state_count > 0 ? &pm_domain_cpu_gov : NULL;
> > + pd_gov = pd->states ? &pm_domain_cpu_gov : NULL;
> >
> > ret = pm_genpd_init(pd, pd_gov, false);
> > if (ret)
> > --
> > 2.25.1
> >

Re: [PATCH 1/2] cpuidle: psci: Fix regression leading to no genpd governor [ In reply to ]

ulf.hansson at linaro

May 19, 2022, 6:15 AM

Post #4 of 5 (68 views)

Permalink

On Wed, 18 May 2022 at 20:50, Rafael J. Wysocki <rafael@kernel.org> wrote:
>
> On Sat, May 14, 2022 at 6:49 PM Anup Patel <anup@brainfault.org> wrote:
> >
> > On Sat, May 14, 2022 at 8:50 PM Ulf Hansson <ulf.hansson@linaro.org> wrote:
> > >
> > > While factoring out the PM domain related code from PSCI domain driver into
> > > a set of library functions, a regression when initializing the genpds got
> > > introduced. More precisely, we fail to assign a genpd governor, so let's
> > > fix this.
> > >
> > > Fixes: 9d976d6721df ("cpuidle: Factor-out power domain related code from PSCI domain driver")
> > > Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
> >
> > Looks good to me.
> >
> > Reviewed-by: Anup Patel <anup@brainfault.org>
> >
>
> Ulf, do you want me to take this lot or is it going to be handled elsewhere?

I appreciate it if you can pick both this and the second patch.

Kind regards
Uffe

>
> > > ---
> > > drivers/cpuidle/cpuidle-psci-domain.c | 4 ++--
> > > 1 file changed, 2 insertions(+), 2 deletions(-)
> > >
> > > diff --git a/drivers/cpuidle/cpuidle-psci-domain.c b/drivers/cpuidle/cpuidle-psci-domain.c
> > > index 755bbdfc5b82..3db4fca1172b 100644
> > > --- a/drivers/cpuidle/cpuidle-psci-domain.c
> > > +++ b/drivers/cpuidle/cpuidle-psci-domain.c
> > > @@ -52,7 +52,7 @@ static int psci_pd_init(struct device_node *np, bool use_osi)
> > > struct generic_pm_domain *pd;
> > > struct psci_pd_provider *pd_provider;
> > > struct dev_power_governor *pd_gov;
> > > - int ret = -ENOMEM, state_count = 0;
> > > + int ret = -ENOMEM;
> > >
> > > pd = dt_idle_pd_alloc(np, psci_dt_parse_state_node);
> > > if (!pd)
> > > @@ -71,7 +71,7 @@ static int psci_pd_init(struct device_node *np, bool use_osi)
> > > pd->flags |= GENPD_FLAG_ALWAYS_ON;
> > >
> > > /* Use governor for CPU PM domains if it has some states to manage. */
> > > - pd_gov = state_count > 0 ? &pm_domain_cpu_gov : NULL;
> > > + pd_gov = pd->states ? &pm_domain_cpu_gov : NULL;
> > >
> > > ret = pm_genpd_init(pd, pd_gov, false);
> > > if (ret)
> > > --
> > > 2.25.1
> > >

Re: [PATCH 1/2] cpuidle: psci: Fix regression leading to no genpd governor [ In reply to ]

rafael at kernel

May 19, 2022, 12:15 PM

Post #5 of 5 (64 views)

Permalink

On Thu, May 19, 2022 at 3:01 PM Ulf Hansson <ulf.hansson@linaro.org> wrote:
>
> On Wed, 18 May 2022 at 20:50, Rafael J. Wysocki <rafael@kernel.org> wrote:
> >
> > On Sat, May 14, 2022 at 6:49 PM Anup Patel <anup@brainfault.org> wrote:
> > >
> > > On Sat, May 14, 2022 at 8:50 PM Ulf Hansson <ulf.hansson@linaro.org> wrote:
> > > >
> > > > While factoring out the PM domain related code from PSCI domain driver into
> > > > a set of library functions, a regression when initializing the genpds got
> > > > introduced. More precisely, we fail to assign a genpd governor, so let's
> > > > fix this.
> > > >
> > > > Fixes: 9d976d6721df ("cpuidle: Factor-out power domain related code from PSCI domain driver")
> > > > Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
> > >
> > > Looks good to me.
> > >
> > > Reviewed-by: Anup Patel <anup@brainfault.org>
> > >
> >
> > Ulf, do you want me to take this lot or is it going to be handled elsewhere?
>
> I appreciate it if you can pick both this and the second patch.

Both applied, thanks!