Sourav Poddar <sourav.poddar@xxxxxx> writes:
> Remove "no_idle_on_suspend" check, since respective
> driver should be able to prevent idling of a
> device whenever required.
>
> Driver's can get same behavior by just returning -EBUSY
> from their ->runtime_suspend only during suspend.
>
> Cc: Santosh Shilimkar <santosh.shilimkar@xxxxxx>
> Cc: Felipe Balbi <balbi@xxxxxx>
> Cc: Rajendra nayak <rnayak@xxxxxx>
> Cc: Grygorii Strashko <grygorii.strashko@xxxxxx>
> Signed-off-by: Sourav Poddar <sourav.poddar@xxxxxx>
> Reviewed-by: Felipe Balbi <balbi@xxxxxx>
> ---
> arch/arm/mach-omap2/omap_device.c | 12 +++---------
> arch/arm/mach-omap2/omap_device.h | 10 ----------
> 2 files changed, 3 insertions(+), 19 deletions(-)
>
> diff --git a/arch/arm/mach-omap2/omap_device.c b/arch/arm/mach-omap2/omap_device.c
> index 381be7a..2043d71 100644
> --- a/arch/arm/mach-omap2/omap_device.c
> +++ b/arch/arm/mach-omap2/omap_device.c
> @@ -170,9 +170,6 @@ static int omap_device_build_from_dt(struct platform_device *pdev)
> r->name = dev_name(&pdev->dev);
> }
>
> - if (of_get_property(node, "ti,no_idle_on_suspend", NULL))
> - omap_device_disable_idle_on_suspend(pdev);
> -
> pdev->dev.pm_domain = &omap_device_pm_domain;
>
> odbfd_exit1:
> @@ -620,11 +617,9 @@ static int _od_suspend_noirq(struct device *dev)
> ret = pm_generic_suspend_noirq(dev);
>
> if (!ret && !pm_runtime_status_suspended(dev)) {
> - if (pm_generic_runtime_suspend(dev) == 0) {
> - if (!(od->flags & OMAP_DEVICE_NO_IDLE_ON_SUSPEND))
> - omap_device_idle(pdev);
> + if (pm_generic_runtime_suspend(dev) == 0)
> + omap_device_idle(pdev);
> od->flags |= OMAP_DEVICE_SUSPENDED;
> - }
Look closely at the if statement, followed by more than one line, and
the braces removed.
That means that od->flag will be set, even when omap_device_idle() was
not called. Which in turn means that upon resume, omap_device_enable()
will be called on a device that has not had omap_device_idle() called,
which means there would be WARNs coming from omap_device due to the
mismatch.
Hmm... this does not instill confidence that this code has been tested.
Kevin
> }
>
> return ret;
> @@ -638,8 +633,7 @@ static int _od_resume_noirq(struct device *dev)
> if ((od->flags & OMAP_DEVICE_SUSPENDED) &&
> !pm_runtime_status_suspended(dev)) {
> od->flags &= ~OMAP_DEVICE_SUSPENDED;
> - if (!(od->flags & OMAP_DEVICE_NO_IDLE_ON_SUSPEND))
> - omap_device_enable(pdev);
> + omap_device_enable(pdev);
> pm_generic_runtime_resume(dev);
> }
>
> diff --git a/arch/arm/mach-omap2/omap_device.h b/arch/arm/mach-omap2/omap_device.h
> index 044c31d..17ca1ae 100644
> --- a/arch/arm/mach-omap2/omap_device.h
> +++ b/arch/arm/mach-omap2/omap_device.h
> @@ -38,7 +38,6 @@ extern struct dev_pm_domain omap_device_pm_domain;
>
> /* omap_device.flags values */
> #define OMAP_DEVICE_SUSPENDED BIT(0)
> -#define OMAP_DEVICE_NO_IDLE_ON_SUSPEND BIT(1)
>
> /**
> * struct omap_device - omap_device wrapper for platform_devices
> @@ -101,13 +100,4 @@ static inline struct omap_device *to_omap_device(struct platform_device *pdev)
> {
> return pdev ? pdev->archdata.od : NULL;
> }
> -
> -static inline
> -void omap_device_disable_idle_on_suspend(struct platform_device *pdev)
> -{
> - struct omap_device *od = to_omap_device(pdev);
> -
> - od->flags |= OMAP_DEVICE_NO_IDLE_ON_SUSPEND;
> -}
> -
> #endif
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