pm_runtime_suspended() can be false if RPM_SUSPENDED

[Kevin Hilman <khilman@ti.com>]

Hi Rafael,

Just curious why pm_runtime_suspended() requires the device to be
enabled for it to return true:

static inline bool pm_runtime_suspended(struct device *dev)
{
	return dev->power.runtime_status == RPM_SUSPENDED
		&& !dev->power.disable_depth;
}

I must be misunderstanding something, but I would consider a device that
has been runtime suspended before runtime PM was disabled to still be
runtime suspended.

I just noticed this when testing with your pm-domains branch.  when I
noticed that an 'if (pm_runtime_suspended(dev))' check in my PM domain's
->suspend_noirq() was always failing since it's after the PM core calls
pm_runtime_disable().  I had to change my PM domain code to only check
dev->power.runtime_status for it to work.

Kevin