Like scsi's async suspend support, allow scsi devices to be shut down
asynchronously to reduce system shutdown time.

Signed-off-by: David Jeffery <djeffery@redhat.com>
Signed-off-by: Stuart Hayes <stuart.w.hayes@gmail.com>
Tested-by: Laurence Oberman <loberman@redhat.com>
---
 drivers/scsi/hosts.c      | 3 +++
 drivers/scsi/scsi_scan.c  | 1 +
 drivers/scsi/scsi_sysfs.c | 4 ++++
 3 files changed, 8 insertions(+)

diff --git a/drivers/scsi/hosts.c b/drivers/scsi/hosts.c
index e047747d4ecf..dfb38a82c0bf 100644
--- a/drivers/scsi/hosts.c
+++ b/drivers/scsi/hosts.c
@@ -273,6 +273,7 @@ int scsi_add_host_with_dma(struct Scsi_Host *shost, struct device *dev,
 	pm_runtime_set_active(&shost->shost_gendev);
 	pm_runtime_enable(&shost->shost_gendev);
 	device_enable_async_suspend(&shost->shost_gendev);
+	device_enable_async_shutdown(&shost->shost_gendev);
 
 	error = device_add(&shost->shost_gendev);
 	if (error)
@@ -282,6 +283,7 @@ int scsi_add_host_with_dma(struct Scsi_Host *shost, struct device *dev,
 	get_device(shost->shost_gendev.parent);
 
 	device_enable_async_suspend(&shost->shost_dev);
+	device_enable_async_shutdown(&shost->shost_dev);
 
 	get_device(&shost->shost_gendev);
 	error = device_add(&shost->shost_dev);
@@ -519,6 +521,7 @@ struct Scsi_Host *scsi_host_alloc(const struct scsi_host_template *sht, int priv
 	shost->shost_gendev.bus = &scsi_bus_type;
 	shost->shost_gendev.type = &scsi_host_type;
 	scsi_enable_async_suspend(&shost->shost_gendev);
+	device_enable_async_shutdown(&shost->shost_gendev);
 
 	device_initialize(&shost->shost_dev);
 	shost->shost_dev.parent = &shost->shost_gendev;
diff --git a/drivers/scsi/scsi_scan.c b/drivers/scsi/scsi_scan.c
index 60c06fa4ec32..c42b33e8ea8a 100644
--- a/drivers/scsi/scsi_scan.c
+++ b/drivers/scsi/scsi_scan.c
@@ -518,6 +518,7 @@ static struct scsi_target *scsi_alloc_target(struct device *parent,
 	dev->bus = &scsi_bus_type;
 	dev->type = &scsi_target_type;
 	scsi_enable_async_suspend(dev);
+	device_enable_async_shutdown(dev);
 	starget->id = id;
 	starget->channel = channel;
 	starget->can_queue = 0;
diff --git a/drivers/scsi/scsi_sysfs.c b/drivers/scsi/scsi_sysfs.c
index 6b8c5c05f294..c76ba17b206f 100644
--- a/drivers/scsi/scsi_sysfs.c
+++ b/drivers/scsi/scsi_sysfs.c
@@ -1370,6 +1370,7 @@ static int scsi_target_add(struct scsi_target *starget)
 	pm_runtime_set_active(&starget->dev);
 	pm_runtime_enable(&starget->dev);
 	device_enable_async_suspend(&starget->dev);
+	device_enable_async_shutdown(&starget->dev);
 
 	return 0;
 }
@@ -1396,6 +1397,7 @@ int scsi_sysfs_add_sdev(struct scsi_device *sdev)
 	transport_configure_device(&starget->dev);
 
 	device_enable_async_suspend(&sdev->sdev_gendev);
+	device_enable_async_shutdown(&sdev->sdev_gendev);
 	scsi_autopm_get_target(starget);
 	pm_runtime_set_active(&sdev->sdev_gendev);
 	if (!sdev->rpm_autosuspend)
@@ -1415,6 +1417,7 @@ int scsi_sysfs_add_sdev(struct scsi_device *sdev)
 	}
 
 	device_enable_async_suspend(&sdev->sdev_dev);
+	device_enable_async_shutdown(&sdev->sdev_dev);
 	error = device_add(&sdev->sdev_dev);
 	if (error) {
 		sdev_printk(KERN_INFO, sdev,
@@ -1670,6 +1673,7 @@ void scsi_sysfs_device_initialize(struct scsi_device *sdev)
 	sdev->sdev_gendev.bus = &scsi_bus_type;
 	sdev->sdev_gendev.type = &scsi_dev_type;
 	scsi_enable_async_suspend(&sdev->sdev_gendev);
+	device_enable_async_shutdown(&sdev->sdev_gendev);
 	dev_set_name(&sdev->sdev_gendev, "%d:%d:%d:%llu",
 		     sdev->host->host_no, sdev->channel, sdev->id, sdev->lun);
 	sdev->sdev_gendev.groups = hostt->sdev_groups;
-- 
2.53.0

David,

> Like scsi's async suspend support, allow scsi devices to be shut down
> asynchronously to reduce system shutdown time.

Looks OK to me.

Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com>

-- 
Martin K. Petersen