isci: Fixed BUG_ON in isci_abort_task_process_cb callback.

The request may be in the "aborted" or the "completed" state when
performing a task management operation on it.

Signed-off-by: Jeff Skirvin <jeffrey.d.skirvin@intel.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
diff --git a/drivers/scsi/isci/task.c b/drivers/scsi/isci/task.c
index c2d74c3..a1234e4 100644
--- a/drivers/scsi/isci/task.c
+++ b/drivers/scsi/isci/task.c
@@ -1116,7 +1116,8 @@
 		 * request state was already set to "aborted" by the abort
 		 * task function.
 		 */
-		BUG_ON(old_request->status != aborted);
+		BUG_ON((old_request->status != aborted)
+			&& (old_request->status != completed));
 		break;
 
 	case isci_tmf_timed_out: