Index: sys/cam/cam_xpt.c
===================================================================
--- sys/cam/cam_xpt.c
+++ sys/cam/cam_xpt.c
@@ -2450,7 +2450,8 @@
 xpt_action(union ccb *start_ccb)
 {
 
-	CAM_DEBUG(start_ccb->ccb_h.path, CAM_DEBUG_TRACE, ("xpt_action\n"));
+	CAM_DEBUG(start_ccb->ccb_h.path, CAM_DEBUG_TRACE,
+	    ("xpt_action: func=%#x\n", start_ccb->ccb_h.func_code));
 
 	start_ccb->ccb_h.status = CAM_REQ_INPROG;
 	(*(start_ccb->ccb_h.path->bus->xport->action))(start_ccb);
@@ -2464,7 +2465,8 @@
 	int lock;
 
 	path = start_ccb->ccb_h.path;
-	CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_action_default\n"));
+	CAM_DEBUG(path, CAM_DEBUG_TRACE,
+	    ("xpt_action_default: func=%#x\n", start_ccb->ccb_h.func_code));
 
 	switch (start_ccb->ccb_h.func_code) {
 	case XPT_SCSI_IO:
@@ -2618,7 +2620,11 @@
 		lock = (mtx_owned(sim->mtx) == 0);
 		if (lock)
 			CAM_SIM_LOCK(sim);
+		CAM_DEBUG(path, CAM_DEBUG_TRACE,
+		    ("sim->sim_action: func=%#x\n", start_ccb->ccb_h.func_code));
 		(*(sim->sim_action))(sim, start_ccb);
+		CAM_DEBUG(path, CAM_DEBUG_TRACE,
+		    ("sim->sim_action: status=%#x\n", start_ccb->ccb_h.status));
 		if (lock)
 			CAM_SIM_UNLOCK(sim);
 		break;