On 2020-04-30 22:12, Can Guo wrote:
> diff --git a/drivers/scsi/scsi_pm.c b/drivers/scsi/scsi_pm.c
> index 3717eea..d18271d 100644
> --- a/drivers/scsi/scsi_pm.c
> +++ b/drivers/scsi/scsi_pm.c
> @@ -74,12 +74,15 @@ static int scsi_dev_type_resume(struct device *dev,
> {
> const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL;
> int err = 0;
> + bool was_rpm_suspended = false;
>
> err = cb(dev, pm);
> scsi_device_resume(to_scsi_device(dev));
> dev_dbg(dev, "scsi resume: %d\n", err);
>
> if (err == 0) {
> + was_rpm_suspended = pm_runtime_suspended(dev);
> +
How about renaming this variable into "was_runtime_suspended"? How about
moving the declaration of that variable inside the if-statement?
> pm_runtime_disable(dev);
> err = pm_runtime_set_active(dev);
> pm_runtime_enable(dev);
> @@ -93,8 +96,10 @@ static int scsi_dev_type_resume(struct device *dev,
> */
> if (!err && scsi_is_sdev_device(dev)) {
> struct scsi_device *sdev = to_scsi_device(dev);
> -
> - blk_set_runtime_active(sdev->request_queue);
> + if (was_rpm_suspended)
> + blk_post_runtime_resume(sdev->request_queue,
> 0);
> + else
> + blk_set_runtime_active(sdev->request_queue);
> }
> }
Does other code always call both blk_pre_runtime_resume() and
blk_post_runtime_resume() upon runtime resume? How about adding a
blk_pre_runtime_resume() call before the blk_post_runtime_resume() call?
Thanks,
Bart.
