1 files changed, 40 insertions, 5 deletions

diff --git a/drivers/ata/libata-scsi.c b/drivers/ata/libata-scsi.c
index fb73c145b49a..8b43290ca2cd 100644
--- a/drivers/ata/libata-scsi.c
+++ b/drivers/ata/libata-scsi.c
@@ -1090,6 +1090,42 @@ int ata_scsi_dev_config(struct scsi_device *sdev, struct ata_device *dev)
 }
 
 /**
+ *	ata_scsi_slave_alloc - Early setup of SCSI device
+ *	@sdev: SCSI device to examine
+ *
+ *	This is called from scsi_alloc_sdev() when the scsi device
+ *	associated with an ATA device is scanned on a port.
+ *
+ *	LOCKING:
+ *	Defined by SCSI layer.  We don't really care.
+ */
+
+int ata_scsi_slave_alloc(struct scsi_device *sdev)
+{
+	struct ata_port *ap = ata_shost_to_port(sdev->host);
+	struct device_link *link;
+
+	ata_scsi_sdev_config(sdev);
+
+	/*
+	 * Create a link from the ata_port device to the scsi device to ensure
+	 * that PM does suspend/resume in the correct order: the scsi device is
+	 * consumer (child) and the ata port the supplier (parent).
+	 */
+	link = device_link_add(&sdev->sdev_gendev, &ap->tdev,
+			       DL_FLAG_STATELESS |
+			       DL_FLAG_PM_RUNTIME | DL_FLAG_RPM_ACTIVE);
+	if (!link) {
+		ata_port_err(ap, "Failed to create link to scsi device %s\n",
+			     dev_name(&sdev->sdev_gendev));
+		return -ENODEV;
+	}
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(ata_scsi_slave_alloc);
+
+/**
  *	ata_scsi_slave_config - Set SCSI device attributes
  *	@sdev: SCSI device to examine
  *
@@ -1105,14 +1141,11 @@ int ata_scsi_slave_config(struct scsi_device *sdev)
 {
 	struct ata_port *ap = ata_shost_to_port(sdev->host);
 	struct ata_device *dev = __ata_scsi_find_dev(ap, sdev);
-	int rc = 0;
-
-	ata_scsi_sdev_config(sdev);
 
 	if (dev)
-		rc = ata_scsi_dev_config(sdev, dev);
+		return ata_scsi_dev_config(sdev, dev);
 
-	return rc;
+	return 0;
 }
 EXPORT_SYMBOL_GPL(ata_scsi_slave_config);
 
@@ -1136,6 +1169,8 @@ void ata_scsi_slave_destroy(struct scsi_device *sdev)
 	unsigned long flags;
 	struct ata_device *dev;
 
+	device_link_remove(&sdev->sdev_gendev, &ap->tdev);
+
 	spin_lock_irqsave(ap->lock, flags);
 	dev = __ata_scsi_find_dev(ap, sdev);
 	if (dev && dev->sdev) {