==== //depot/projects/ia64/sys/cam/cam_periph.c#2 - /home/src/sys/cam/cam_periph.c ====
@@ -575,6 +575,8 @@
 		numbufs = 1;
 		break;
 	default:
+printf("cam_periph_mapmem: EINVAL - %d\n", ccb->ccb_h.func_code);
+
 		return(EINVAL);
 		break; /* NOTREACHED */
 	}
@@ -1637,6 +1639,7 @@
 	case CAM_NO_HBA:
 	case CAM_PROVIDE_FAIL:
 	case CAM_REQ_TOO_BIG:
+printf("cam_periph_error: EINVAL - %d\n", status);
 		error = EINVAL;
 		break;
 	case CAM_SCSI_BUS_RESET:
==== //depot/projects/ia64/sys/cam/cam_xpt.c#6 - /home/src/sys/cam/cam_xpt.c ====
@@ -1030,6 +1030,7 @@
 		case XPT_RESET_BUS:
 			if ((inccb->ccb_h.target_id != CAM_TARGET_WILDCARD)
 			 || (inccb->ccb_h.target_lun != CAM_LUN_WILDCARD)) {
+printf("xptioctl: EINVAL 1 = %d\n", inccb->ccb_h.func_code);
 				error = EINVAL;
 				break;
 			}
@@ -1049,6 +1050,7 @@
 					    inccb->ccb_h.target_id,
 					    inccb->ccb_h.target_lun) !=
 					    CAM_REQ_CMP){
+printf("xptioctl: EINVAL 2 = %d\n", inccb->ccb_h.func_code);
 				error = EINVAL;
 				xpt_free_ccb(ccb);
 				break;
@@ -1081,6 +1083,7 @@
 					    inccb->ccb_h.target_id,
 					    inccb->ccb_h.target_lun) !=
 					    CAM_REQ_CMP){
+printf("xptioctl: EINVAL 3 = %d\n", inccb->ccb_h.func_code);
 				error = EINVAL;
 				break;
 			}
@@ -1104,6 +1107,7 @@
 			 * type of transaction.
 			 */
 			if (inccb->ccb_h.flags & CAM_DATA_PHYS) {
+printf("xptioctl: EINVAL 4 = %d\n", inccb->ccb_h.func_code);
 				error = EINVAL;
 				break;
 			}
@@ -1202,6 +1206,7 @@
 		 * driver name.
 		 */
 		if (*ccb->cgdl.periph_name == '\0') {
+printf("xptioctl: EINVAL 5 CAMGETPASSTHRU\n");
 			error = EINVAL;
 			break;
 		}