[SCSI] qla2xxx: Correct regression in relogin code.

Commit 63a8651f ([SCSI] qla2xxx:
Correct infinite-login-retry issue.) introduced a small
regression where a successful relogin would result in an fcport's
loop_id to be incorrectly reset to FC_NO_LOOP_ID.  Only clear-out
loopid, if retries have been 'truly' exhausted.
Signed-off-by: NAndrew Vasquez <andrew.vasquez@qlogic.com>
Cc: Stable Tree <stable@kernel.org>
Signed-off-by: NJames Bottomley <James.Bottomley@HansenPartnership.com>

drivers/scsi/qla2xxx/qla_os.c

@@ -2373,7 +2373,7 @@ qla2x00_do_dpc(void *data)
 					} else {
 						fcport->login_retry = 0;
 					}
-					if (fcport->login_retry == 0)
+					if (fcport->login_retry == 0 && status != QLA_SUCCESS)
 						fcport->loop_id = FC_NO_LOOP_ID;
 				}
 				if (test_bit(LOOP_RESYNC_NEEDED, &ha->dpc_flags))