On Tue, 15 May 2012, Lin Ming wrote:
> Add ->runtime_pm callback and ->pm_status to request queue.
> As an example, implement a simple queue runtime_pm callback
> in sd driver.
> +static int sd_runtime_pm_fn(struct request_queue *q, pm_message_t mesg)
> +{
> + struct scsi_device *sdp = q->queuedata;
> +
> + if (mesg.event == PM_EVENT_SUSPEND) {
> + q->pm_status = RPM_SUSPENDING;
> + pm_runtime_put(&sdp->sdev_gendev);
> + }
> + else if (mesg.event == PM_EVENT_RESUME) {
> + q->pm_status = RPM_RESUMING;
> + pm_runtime_get(&sdp->sdev_gendev);
> + }
Don't use pm_message_t arguments for runtime PM. Implement separate
routines for suspend and resume.
Alan Stern
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