LOCAL: mpt_sas: store LED state, expose via ioctl

@@ -20,10 +20,11 @@
  */
 
 /*
  * Copyright (c) 2009, 2010, Oracle and/or its affiliates. All rights reserved.
  * Copyright 2012 Nexenta Systems, Inc. All rights reserved.
+ * Copyright (c) 2012, Joyent, Inc. All rights reserved.
  */
 
 /*
  * Copyright (c) 2000 to 2010, LSI Corporation.
  * All rights reserved.

@@ -206,10 +207,11 @@
                 uint16_t                m_qfull_retry_interval;
                 uint8_t                 m_qfull_retries;
                 uint16_t                m_enclosure;
                 uint16_t                m_slot_num;
                 uint32_t                m_tgt_unconfigured;
+                uint8_t                 m_led_status;
 
                 /*
                  * For the common case, the elements in this structure are
                  * protected by the per hba instance mutex. In order to make
                  * the key code path in ISR lockless, a separate mutex is