+/**
+ * ufshcd_change_queue_depth - change queue depth
+ * @sdev: pointer to SCSI device
+ * @depth: required depth to set
+ * @reason: reason for changing the depth
+ *
+ * Change queue depth according to the reason and make sure
+ * the max. limits are not crossed.
+ */
+int ufshcd_change_queue_depth(struct scsi_device *sdev, int depth, int reason)
+{
+ struct ufs_hba *hba = shost_priv(sdev->host);
+
+ if (depth > hba->nutrs)
+ depth = hba->nutrs;
+
+ switch (reason) {
+ case SCSI_QDEPTH_DEFAULT:
+ case SCSI_QDEPTH_RAMP_UP:
+ if (!sdev->tagged_supported)
+ depth = 1;
+ scsi_adjust_queue_depth(sdev, scsi_get_tag_type(sdev), depth);
+ break;
+ case SCSI_QDEPTH_QFULL:
+ scsi_track_queue_full(sdev, depth);
+ break;
+ default:
+ return -EOPNOTSUPP;
+ }
+
+ return depth;
+}
+