staging/rdma/hfi1: use mod_timer when appropriate

Hello Mike Marciniszyn,

The patch 633d27399514: "staging/rdma/hfi1: use mod_timer when appropriate" from Feb 4, 2016, leads to the following static checker warning:

	drivers/staging/rdma/hfi1/rc.c:1500 do_rc_ack()
	info: ignoring unreachable code.

drivers/staging/rdma/hfi1/rc.c
1487 default:
1488 /* Ignore other reserved NAK error codes */
1489 goto reserved;

  1490                  }
  1491                  qp->s_retry = qp->s_retry_cnt;
  1492                  qp->s_rnr_retry = qp->s_rnr_retry_cnt;
  1493                  goto bail_stop;
  1494  
  1495          default:                /* 2: reserved */
  1496  reserved:
  1497                  /* Ignore reserved NAK codes. */
  1498                  goto bail_stop;
  1499          }
  1500          return ret;
                ^^^^^^^^^^

Not reachable.

  1501  bail_stop:
  1502          hfi1_stop_rc_timers(qp);
  1503          return ret;
  1504  }

regards,
dan carpenter
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