[SCSI] mptfusion: sas nexus loss support

sas nexus loss support for systems that suport failover.

Signed-off-by: Eric Moore <Eric.Moore@lsil.com>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>

diff --git a/drivers/message/fusion/mptscsih.c b/drivers/message/fusion/mptscsih.c
index c8a9d8e8c5de627d370e3b311f20f8538747b398..bc099651df73b4015fe961f24ff4752cfde074a1 100644 (file)
--- a/drivers/message/fusion/mptscsih.c
+++ b/drivers/message/fusion/mptscsih.c
@@ -66,6 +66,7 @@
 
 #include "mptbase.h"
 #include "mptscsih.h"
+#include "lsi/mpi_log_sas.h"
 
 /*=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=*/
 #define my_NAME                "Fusion MPT SCSI Host driver"
@@ -682,8 +683,24 @@ mptscsih_io_done(MPT_ADAPTER *ioc, MPT_FRAME_HDR *mf, MPT_FRAME_HDR *mr)
                        }
                        break;
 
-               case MPI_IOCSTATUS_SCSI_TASK_TERMINATED:        /* 0x0048 */
                case MPI_IOCSTATUS_SCSI_IOC_TERMINATED:         /* 0x004B */
+                       if ( ioc->bus_type == SAS ) {
+                               u16 ioc_status = le16_to_cpu(pScsiReply->IOCStatus);
+                               if (ioc_status & MPI_IOCSTATUS_FLAG_LOG_INFO_AVAILABLE) {
+                                       u32 log_info = le32_to_cpu(mr->u.reply.IOCLogInfo);
+                                       log_info &=SAS_LOGINFO_MASK;
+                                       if (log_info == SAS_LOGINFO_NEXUS_LOSS) {
+                                               sc->result = (DID_BUS_BUSY << 16);
+                                               break;
+                                       }
+                               }
+                       }
+
+                       /*
+                        * Allow non-SAS & non-NEXUS_LOSS to drop into below code
+                        */
+
+               case MPI_IOCSTATUS_SCSI_TASK_TERMINATED:        /* 0x0048 */
                case MPI_IOCSTATUS_SCSI_EXT_TERMINATED:         /* 0x004C */
                        /* Linux handles an unsolicited DID_RESET better
                         * than an unsolicited DID_ABORT.