Re: [RFC PATCH v3 5/8] pm: runtime: Introduce pm_runtime_get_if_not_suspended()

[Nicolin Chen <nicolinc@nvidia.com>]

On Mon, Jun 16, 2025 at 08:31:46PM +0000, Pranjal Shrivastava wrote:
> +int pm_runtime_get_if_not_suspended(struct device *dev)
> +{
> +	unsigned long flags;
> +	int retval;
> +
> +	spin_lock_irqsave(&dev->power.lock, flags);
> +	if (dev->power.disable_depth > 0) {
> +		retval = -EINVAL;
> +		goto out;
> +	}
> +
> +	if (dev->power.runtime_status == RPM_SUSPENDED) {
> +		retval = 0;
> +		goto out;
> +	}
> +
> +	/* Cancel the auto-suspend timer */
> +	pm_runtime_cancel_pending(dev);
> +	atomic_inc(&dev->power.usage_count);
> +	__update_runtime_status(dev, RPM_ACTIVE);
> +	retval = 1;
[...]
> +	spin_unlock_irqrestore(&dev->power.lock, flags);
> +
> +	return retval;
> +out:
> +	spin_unlock_irqrestore(&dev->power.lock, flags);
> +	return retval;
> +}
 
One pair is enough.