[PATCH v19 7/7] scsi: Enable async shutdown support

[Tarun Sahu <tarunsahu@google.com>]

From: David Jeffery <djeffery@redhat.com>

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>
Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com>
Reviewed-by: Pasha Tatashin <pasha.tatashin@soleen.com>
Reviewed-by: John Garry <john.g.garry@oracle.com>
---
 drivers/scsi/hosts.c      | 2 ++
 drivers/scsi/scsi_sysfs.c | 3 +++
 2 files changed, 5 insertions(+)

diff --git a/drivers/scsi/hosts.c b/drivers/scsi/hosts.c
index e047747d4ecf..bf691acc7a67 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);
+	dev_set_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);
+	dev_set_async_shutdown(&shost->shost_dev);
 
 	get_device(&shost->shost_gendev);
 	error = device_add(&shost->shost_dev);
diff --git a/drivers/scsi/scsi_sysfs.c b/drivers/scsi/scsi_sysfs.c
index dfc3559e7e04..8fd317aef37b 100644
--- a/drivers/scsi/scsi_sysfs.c
+++ b/drivers/scsi/scsi_sysfs.c
@@ -1386,6 +1386,7 @@ 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);
+	dev_set_async_shutdown(&starget->dev);
 
 	return 0;
 }
@@ -1412,6 +1413,7 @@ int scsi_sysfs_add_sdev(struct scsi_device *sdev)
 	transport_configure_device(&starget->dev);
 
 	device_enable_async_suspend(&sdev->sdev_gendev);
+	dev_set_async_shutdown(&sdev->sdev_gendev);
 	scsi_autopm_get_target(starget);
 	pm_runtime_set_active(&sdev->sdev_gendev);
 	if (!sdev->rpm_autosuspend)
@@ -1431,6 +1433,7 @@ int scsi_sysfs_add_sdev(struct scsi_device *sdev)
 	}
 
 	device_enable_async_suspend(&sdev->sdev_dev);
+	dev_set_async_shutdown(&sdev->sdev_dev);
 	error = device_add(&sdev->sdev_dev);
 	if (error) {
 		sdev_printk(KERN_INFO, sdev,
-- 
2.55.0.229.g6434b31f56-goog