On Wed, 15 Dec 2010, Rafael J. Wysocki wrote:
> From: Rafael J. Wysocki <rjw@xxxxxxx>
> Subject: PM / Runtime: Fix pm_runtime_suspended()
>
> pm_runtime_suspended() shouldn't return true if the runtime PM of the
> given device is disabled.
>
> Signed-off-by: Rafael J. Wysocki <rjw@xxxxxxx>
> ---
> include/linux/pm_runtime.h | 3 ++-
> 1 file changed, 2 insertions(+), 1 deletion(-)
>
> Index: linux-2.6/include/linux/pm_runtime.h
> ===================================================================
> --- linux-2.6.orig/include/linux/pm_runtime.h
> +++ linux-2.6/include/linux/pm_runtime.h
> @@ -78,7 +78,8 @@ static inline void device_set_run_wake(s
>
> static inline bool pm_runtime_suspended(struct device *dev)
> {
> - return dev->power.runtime_status == RPM_SUSPENDED;
> + return dev->power.runtime_status == RPM_SUSPENDED
> + && !dev->power.disable_depth;
> }
You need to update the documentation entry for pm_runtime_suspended as
well.
I think this is okay. If a driver or subsystem uses
pm_runtime_suspended() then it must be runtime-PM-aware, so it wouldn't
leave a device disabled for runtime PM.
So in theory the only place this would matter is if the function is
called in a generic setting, and AFAICT the only place that happens is
in generic_ops.c, where the change is correct.
Alan Stern
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