mpt3sas: Clear PFA Status on SGPIO when PFA Drive is Removed or Replaced

Added code to send an SEP message that turns off the Predictive
Failure LED when a drive is removed (if Predictive Failure LED was turned on).

Added a new flag 'pfa_led_on' per device that tracks the status of Predictive
Failure LED. When the drive is removed, this flag is checked and
sends an SEP message to turn off the respective Predictive Failure LED.

Signed-off-by: Sreekanth Reddy <Sreekanth.Reddy@avagotech.com>
Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>

1 files changed, 4 insertions, 1 deletions

diff --git a/drivers/scsi/mpt3sas/mpt3sas_base.h b/drivers/scsi/mpt3sas/mpt3sas_base.h
index 9b90a6fef706..184826c20874 100644
--- a/drivers/scsi/mpt3sas/mpt3sas_base.h
+++ b/drivers/scsi/mpt3sas/mpt3sas_base.h
@@ -272,8 +272,10 @@ struct _internal_cmd {
  * @channel: target channel
  * @slot: number number
  * @phy: phy identifier provided in sas device page 0
- * @fast_path: fast path feature enable bit
  * @responding: used in _scsih_sas_device_mark_responding
+ * @fast_path: fast path feature enable bit
+ * @pfa_led_on: flag for PFA LED status
+ *
  */
 struct _sas_device {
         struct list_head list;
@@ -293,6 +295,7 @@ struct _sas_device {
         u8      phy;
         u8      responding;
         u8      fast_path;
+        u8      pfa_led_on;
 };
 
 /**