Merge branch 'master' into devel and apply fixup from Stephen Rothwell:

vfs/nfs: fixup for nfs_open_context change

Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>

1 files changed, 218 insertions, 61 deletions

diff --git a/drivers/scsi/mpt2sas/mpt2sas_scsih.c b/drivers/scsi/mpt2sas/mpt2sas_scsih.c
index a7dbc6825f5f..939f283d0c28 100644
--- a/drivers/scsi/mpt2sas/mpt2sas_scsih.c
+++ b/drivers/scsi/mpt2sas/mpt2sas_scsih.c
@@ -94,6 +94,10 @@ static u32 logging_level;
 MODULE_PARM_DESC(logging_level, " bits for enabling additional logging info "
     "(default=0)");
 
+static ushort max_sectors = 0xFFFF;
+module_param(max_sectors, ushort, 0);
+MODULE_PARM_DESC(max_sectors, "max sectors, range 64 to 8192  default=8192");
+
 /* scsi-mid layer global parmeter is max_report_luns, which is 511 */
 #define MPT2SAS_MAX_LUN (16895)
 static int max_lun = MPT2SAS_MAX_LUN;
@@ -1956,7 +1960,7 @@ _scsih_slave_configure(struct scsi_device *sdev)
 		case MPI2_RAID_VOL_TYPE_RAID1E:
 			qdepth = MPT2SAS_RAID_QUEUE_DEPTH;
 			if (ioc->manu_pg10.OEMIdentifier &&
-			    (ioc->manu_pg10.GenericFlags0 &
+			    (le32_to_cpu(ioc->manu_pg10.GenericFlags0) &
 			    MFG10_GF0_R10_DISPLAY) &&
 			    !(raid_device->num_pds % 2))
 				r_level = "RAID10";
@@ -2236,6 +2240,8 @@ mpt2sas_scsih_clear_tm_flag(struct MPT2SAS_ADAPTER *ioc, u16 handle)
  * @type: MPI2_SCSITASKMGMT_TASKTYPE__XXX (defined in mpi2_init.h)
  * @smid_task: smid assigned to the task
  * @timeout: timeout in seconds
+ * @serial_number: the serial_number from scmd
+ * @m_type: TM_MUTEX_ON or TM_MUTEX_OFF
  * Context: user
  *
  * A generic API for sending task management requests to firmware.
@@ -2247,17 +2253,18 @@ mpt2sas_scsih_clear_tm_flag(struct MPT2SAS_ADAPTER *ioc, u16 handle)
 int
 mpt2sas_scsih_issue_tm(struct MPT2SAS_ADAPTER *ioc, u16 handle, uint channel,
     uint id, uint lun, u8 type, u16 smid_task, ulong timeout,
-    struct scsi_cmnd *scmd)
+	unsigned long serial_number, enum mutex_type m_type)
 {
 	Mpi2SCSITaskManagementRequest_t *mpi_request;
 	Mpi2SCSITaskManagementReply_t *mpi_reply;
 	u16 smid = 0;
 	u32 ioc_state;
 	unsigned long timeleft;
-	struct scsi_cmnd *scmd_lookup;
+	struct scsiio_tracker *scsi_lookup = NULL;
 	int rc;
 
-	mutex_lock(&ioc->tm_cmds.mutex);
+	if (m_type == TM_MUTEX_ON)
+		mutex_lock(&ioc->tm_cmds.mutex);
 	if (ioc->tm_cmds.status != MPT2_CMD_NOT_USED) {
 		printk(MPT2SAS_INFO_FMT "%s: tm_cmd busy!!!\n",
 		    __func__, ioc->name);
@@ -2277,18 +2284,18 @@ mpt2sas_scsih_issue_tm(struct MPT2SAS_ADAPTER *ioc, u16 handle, uint channel,
 	if (ioc_state & MPI2_DOORBELL_USED) {
 		dhsprintk(ioc, printk(MPT2SAS_INFO_FMT "unexpected doorbell "
 		    "active!\n", ioc->name));
-		mpt2sas_base_hard_reset_handler(ioc, CAN_SLEEP,
+		rc = mpt2sas_base_hard_reset_handler(ioc, CAN_SLEEP,
 		    FORCE_BIG_HAMMER);
-		rc = SUCCESS;
+		rc = (!rc) ? SUCCESS : FAILED;
 		goto err_out;
 	}
 
 	if ((ioc_state & MPI2_IOC_STATE_MASK) == MPI2_IOC_STATE_FAULT) {
 		mpt2sas_base_fault_info(ioc, ioc_state &
 		    MPI2_DOORBELL_DATA_MASK);
-		mpt2sas_base_hard_reset_handler(ioc, CAN_SLEEP,
+		rc = mpt2sas_base_hard_reset_handler(ioc, CAN_SLEEP,
 		    FORCE_BIG_HAMMER);
-		rc = SUCCESS;
+		rc = (!rc) ? SUCCESS : FAILED;
 		goto err_out;
 	}
 
@@ -2300,6 +2307,9 @@ mpt2sas_scsih_issue_tm(struct MPT2SAS_ADAPTER *ioc, u16 handle, uint channel,
 		goto err_out;
 	}
 
+	if (type == MPI2_SCSITASKMGMT_TASKTYPE_ABORT_TASK)
+		scsi_lookup = &ioc->scsi_lookup[smid_task - 1];
+
 	dtmprintk(ioc, printk(MPT2SAS_INFO_FMT "sending tm: handle(0x%04x),"
 	    " task_type(0x%02x), smid(%d)\n", ioc->name, handle, type,
 	    smid_task));
@@ -2307,6 +2317,7 @@ mpt2sas_scsih_issue_tm(struct MPT2SAS_ADAPTER *ioc, u16 handle, uint channel,
 	mpi_request = mpt2sas_base_get_msg_frame(ioc, smid);
 	ioc->tm_cmds.smid = smid;
 	memset(mpi_request, 0, sizeof(Mpi2SCSITaskManagementRequest_t));
+	memset(ioc->tm_cmds.reply, 0, sizeof(Mpi2SCSITaskManagementReply_t));
 	mpi_request->Function = MPI2_FUNCTION_SCSI_TASK_MGMT;
 	mpi_request->DevHandle = cpu_to_le16(handle);
 	mpi_request->TaskType = type;
@@ -2322,9 +2333,9 @@ mpt2sas_scsih_issue_tm(struct MPT2SAS_ADAPTER *ioc, u16 handle, uint channel,
 		_debug_dump_mf(mpi_request,
 		    sizeof(Mpi2SCSITaskManagementRequest_t)/4);
 		if (!(ioc->tm_cmds.status & MPT2_CMD_RESET)) {
-			mpt2sas_base_hard_reset_handler(ioc, CAN_SLEEP,
+			rc = mpt2sas_base_hard_reset_handler(ioc, CAN_SLEEP,
 			    FORCE_BIG_HAMMER);
-			rc = SUCCESS;
+			rc = (!rc) ? SUCCESS : FAILED;
 			ioc->tm_cmds.status = MPT2_CMD_NOT_USED;
 			mpt2sas_scsih_clear_tm_flag(ioc, handle);
 			goto err_out;
@@ -2346,20 +2357,12 @@ mpt2sas_scsih_issue_tm(struct MPT2SAS_ADAPTER *ioc, u16 handle, uint channel,
 		}
 	}
 
-	/* sanity check:
-	 * Check to see the commands were terminated.
-	 * This is only needed for eh callbacks, hence the scmd check.
-	 */
-	rc = FAILED;
-	if (scmd == NULL)
-		goto bypass_sanity_checks;
 	switch (type) {
 	case MPI2_SCSITASKMGMT_TASKTYPE_ABORT_TASK:
-		scmd_lookup = _scsih_scsi_lookup_get(ioc, smid_task);
-		if (scmd_lookup)
-			rc = FAILED;
-		else
-			rc = SUCCESS;
+		rc = SUCCESS;
+		if (scsi_lookup->scmd == NULL)
+			break;
+		rc = FAILED;
 		break;
 
 	case MPI2_SCSITASKMGMT_TASKTYPE_TARGET_RESET:
@@ -2369,24 +2372,31 @@ mpt2sas_scsih_issue_tm(struct MPT2SAS_ADAPTER *ioc, u16 handle, uint channel,
 			rc = SUCCESS;
 		break;
 
+	case MPI2_SCSITASKMGMT_TASKTYPE_ABRT_TASK_SET:
 	case MPI2_SCSITASKMGMT_TASKTYPE_LOGICAL_UNIT_RESET:
 		if (_scsih_scsi_lookup_find_by_lun(ioc, id, lun, channel))
 			rc = FAILED;
 		else
 			rc = SUCCESS;
 		break;
+	case MPI2_SCSITASKMGMT_TASKTYPE_QUERY_TASK:
+		rc = SUCCESS;
+		break;
+	default:
+		rc = FAILED;
+		break;
 	}
 
- bypass_sanity_checks:
-
 	mpt2sas_scsih_clear_tm_flag(ioc, handle);
 	ioc->tm_cmds.status = MPT2_CMD_NOT_USED;
-	mutex_unlock(&ioc->tm_cmds.mutex);
+	if (m_type == TM_MUTEX_ON)
+		mutex_unlock(&ioc->tm_cmds.mutex);
 
 	return rc;
 
  err_out:
-	mutex_unlock(&ioc->tm_cmds.mutex);
+	if (m_type == TM_MUTEX_ON)
+		mutex_unlock(&ioc->tm_cmds.mutex);
 	return rc;
 }
 
@@ -2496,7 +2506,8 @@ _scsih_abort(struct scsi_cmnd *scmd)
 	handle = sas_device_priv_data->sas_target->handle;
 	r = mpt2sas_scsih_issue_tm(ioc, handle, scmd->device->channel,
 	    scmd->device->id, scmd->device->lun,
-	    MPI2_SCSITASKMGMT_TASKTYPE_ABORT_TASK, smid, 30, scmd);
+	    MPI2_SCSITASKMGMT_TASKTYPE_ABORT_TASK, smid, 30,
+	    scmd->serial_number, TM_MUTEX_ON);
 
  out:
 	sdev_printk(KERN_INFO, scmd->device, "task abort: %s scmd(%p)\n",
@@ -2557,7 +2568,8 @@ _scsih_dev_reset(struct scsi_cmnd *scmd)
 
 	r = mpt2sas_scsih_issue_tm(ioc, handle, scmd->device->channel,
 	    scmd->device->id, scmd->device->lun,
-	    MPI2_SCSITASKMGMT_TASKTYPE_LOGICAL_UNIT_RESET, 0, 30, scmd);
+	    MPI2_SCSITASKMGMT_TASKTYPE_LOGICAL_UNIT_RESET, 0, 30, 0,
+	    TM_MUTEX_ON);
 
  out:
 	sdev_printk(KERN_INFO, scmd->device, "device reset: %s scmd(%p)\n",
@@ -2617,7 +2629,7 @@ _scsih_target_reset(struct scsi_cmnd *scmd)
 
 	r = mpt2sas_scsih_issue_tm(ioc, handle, scmd->device->channel,
 	    scmd->device->id, 0, MPI2_SCSITASKMGMT_TASKTYPE_TARGET_RESET, 0,
-	    30, scmd);
+	    30, 0, TM_MUTEX_ON);
 
  out:
 	starget_printk(KERN_INFO, starget, "target reset: %s scmd(%p)\n",
@@ -2750,6 +2762,31 @@ _scsih_fw_event_cleanup_queue(struct MPT2SAS_ADAPTER *ioc)
 }
 
 /**
+ * _scsih_ublock_io_all_device - unblock every device
+ * @ioc: per adapter object
+ *
+ * change the device state from block to running
+ */
+static void
+_scsih_ublock_io_all_device(struct MPT2SAS_ADAPTER *ioc)
+{
+	struct MPT2SAS_DEVICE *sas_device_priv_data;
+	struct scsi_device *sdev;
+
+	shost_for_each_device(sdev, ioc->shost) {
+		sas_device_priv_data = sdev->hostdata;
+		if (!sas_device_priv_data)
+			continue;
+		if (!sas_device_priv_data->block)
+			continue;
+		sas_device_priv_data->block = 0;
+		dewtprintk(ioc, sdev_printk(KERN_INFO, sdev, "device_running, "
+		    "handle(0x%04x)\n",
+		    sas_device_priv_data->sas_target->handle));
+		scsi_internal_device_unblock(sdev);
+	}
+}
+/**
  * _scsih_ublock_io_device - set the device state to SDEV_RUNNING
  * @ioc: per adapter object
  * @handle: device handle
@@ -2779,6 +2816,34 @@ _scsih_ublock_io_device(struct MPT2SAS_ADAPTER *ioc, u16 handle)
 }
 
 /**
+ * _scsih_block_io_all_device - set the device state to SDEV_BLOCK
+ * @ioc: per adapter object
+ * @handle: device handle
+ *
+ * During device pull we need to appropiately set the sdev state.
+ */
+static void
+_scsih_block_io_all_device(struct MPT2SAS_ADAPTER *ioc)
+{
+	struct MPT2SAS_DEVICE *sas_device_priv_data;
+	struct scsi_device *sdev;
+
+	shost_for_each_device(sdev, ioc->shost) {
+		sas_device_priv_data = sdev->hostdata;
+		if (!sas_device_priv_data)
+			continue;
+		if (sas_device_priv_data->block)
+			continue;
+		sas_device_priv_data->block = 1;
+		dewtprintk(ioc, sdev_printk(KERN_INFO, sdev, "device_blocked, "
+		    "handle(0x%04x)\n",
+		    sas_device_priv_data->sas_target->handle));
+		scsi_internal_device_block(sdev);
+	}
+}
+
+
+/**
  * _scsih_block_io_device - set the device state to SDEV_BLOCK
  * @ioc: per adapter object
  * @handle: device handle
@@ -3698,7 +3763,7 @@ _scsih_qcmd_lck(struct scsi_cmnd *scmd, void (*done)(struct scsi_cmnd *))
 		return 0;
 	}
 
-	if (ioc->pci_error_recovery) {
+	if (ioc->pci_error_recovery || ioc->remove_host) {
 		scmd->result = DID_NO_CONNECT << 16;
 		scmd->scsi_done(scmd);
 		return 0;
@@ -4598,7 +4663,7 @@ _scsih_expander_add(struct MPT2SAS_ADAPTER *ioc, u16 handle)
 	Mpi2SasEnclosurePage0_t enclosure_pg0;
 	u32 ioc_status;
 	u16 parent_handle;
-	__le64 sas_address, sas_address_parent = 0;
+	u64 sas_address, sas_address_parent = 0;
 	int i;
 	unsigned long flags;
 	struct _sas_port *mpt2sas_port = NULL;
@@ -5380,9 +5445,10 @@ _scsih_sas_device_status_change_event_debug(struct MPT2SAS_ADAPTER *ioc,
 		break;
 	}
 	printk(MPT2SAS_INFO_FMT "device status change: (%s)\n"
-	    "\thandle(0x%04x), sas address(0x%016llx)", ioc->name,
-	    reason_str, le16_to_cpu(event_data->DevHandle),
-	    (unsigned long long)le64_to_cpu(event_data->SASAddress));
+	    "\thandle(0x%04x), sas address(0x%016llx), tag(%d)",
+	    ioc->name, reason_str, le16_to_cpu(event_data->DevHandle),
+	    (unsigned long long)le64_to_cpu(event_data->SASAddress),
+	    le16_to_cpu(event_data->TaskTag));
 	if (event_data->ReasonCode == MPI2_EVENT_SAS_DEV_STAT_RC_SMART_DATA)
 		printk(MPT2SAS_INFO_FMT ", ASC(0x%x), ASCQ(0x%x)\n", ioc->name,
 		    event_data->ASC, event_data->ASCQ);
@@ -5404,7 +5470,7 @@ _scsih_sas_device_status_change_event(struct MPT2SAS_ADAPTER *ioc,
 {
 	struct MPT2SAS_TARGET *target_priv_data;
 	struct _sas_device *sas_device;
-	__le64 sas_address;
+	u64 sas_address;
 	unsigned long flags;
 	Mpi2EventDataSasDeviceStatusChange_t *event_data =
 	    fw_event->event_data;
@@ -5522,25 +5588,38 @@ _scsih_sas_broadcast_primative_event(struct MPT2SAS_ADAPTER *ioc,
 	u32 termination_count;
 	u32 query_count;
 	Mpi2SCSITaskManagementReply_t *mpi_reply;
-#ifdef CONFIG_SCSI_MPT2SAS_LOGGING
 	Mpi2EventDataSasBroadcastPrimitive_t *event_data = fw_event->event_data;
-#endif
 	u16 ioc_status;
 	unsigned long flags;
 	int r;
+	u8 max_retries = 0;
+	u8 task_abort_retries;
 
-	dewtprintk(ioc, printk(MPT2SAS_INFO_FMT "broadcast primitive: "
-	    "phy number(%d), width(%d)\n", ioc->name, event_data->PhyNum,
-	    event_data->PortWidth));
-	dtmprintk(ioc, printk(MPT2SAS_INFO_FMT "%s: enter\n", ioc->name,
-	    __func__));
+	mutex_lock(&ioc->tm_cmds.mutex);
+	dewtprintk(ioc, printk(MPT2SAS_INFO_FMT "%s: enter: phy number(%d), "
+	    "width(%d)\n", ioc->name, __func__, event_data->PhyNum,
+	     event_data->PortWidth));
+
+	_scsih_block_io_all_device(ioc);
 
 	spin_lock_irqsave(&ioc->scsi_lookup_lock, flags);
-	ioc->broadcast_aen_busy = 0;
+	mpi_reply = ioc->tm_cmds.reply;
+broadcast_aen_retry:
+
+	/* sanity checks for retrying this loop */
+	if (max_retries++ == 5) {
+		dewtprintk(ioc, printk(MPT2SAS_INFO_FMT "%s: giving up\n",
+		    ioc->name, __func__));
+		goto out;
+	} else if (max_retries > 1)
+		dewtprintk(ioc, printk(MPT2SAS_INFO_FMT "%s: %d retry\n",
+		    ioc->name, __func__, max_retries - 1));
+
 	termination_count = 0;
 	query_count = 0;
-	mpi_reply = ioc->tm_cmds.reply;
 	for (smid = 1; smid <= ioc->scsiio_depth; smid++) {
+		if (ioc->ioc_reset_in_progress_status)
+			goto out;
 		scmd = _scsih_scsi_lookup_get(ioc, smid);
 		if (!scmd)
 			continue;
@@ -5561,34 +5640,90 @@ _scsih_sas_broadcast_primative_event(struct MPT2SAS_ADAPTER *ioc,
 		lun = sas_device_priv_data->lun;
 		query_count++;
 
+		if (ioc->ioc_reset_in_progress_status)
+			goto out;
+
 		spin_unlock_irqrestore(&ioc->scsi_lookup_lock, flags);
-		mpt2sas_scsih_issue_tm(ioc, handle, 0, 0, lun,
-		    MPI2_SCSITASKMGMT_TASKTYPE_QUERY_TASK, smid, 30, NULL);
-		ioc->tm_cmds.status = MPT2_CMD_NOT_USED;
+		r = mpt2sas_scsih_issue_tm(ioc, handle, 0, 0, lun,
+		    MPI2_SCSITASKMGMT_TASKTYPE_QUERY_TASK, smid, 30, 0,
+		    TM_MUTEX_OFF);
+		if (r == FAILED) {
+			sdev_printk(KERN_WARNING, sdev,
+			    "mpt2sas_scsih_issue_tm: FAILED when sending "
+			    "QUERY_TASK: scmd(%p)\n", scmd);
+			spin_lock_irqsave(&ioc->scsi_lookup_lock, flags);
+			goto broadcast_aen_retry;
+		}
 		ioc_status = le16_to_cpu(mpi_reply->IOCStatus)
 		    & MPI2_IOCSTATUS_MASK;
-		if ((ioc_status == MPI2_IOCSTATUS_SUCCESS) &&
-		    (mpi_reply->ResponseCode ==
+		if (ioc_status != MPI2_IOCSTATUS_SUCCESS) {
+			sdev_printk(KERN_WARNING, sdev, "query task: FAILED "
+			    "with IOCSTATUS(0x%04x), scmd(%p)\n", ioc_status,
+			    scmd);
+			spin_lock_irqsave(&ioc->scsi_lookup_lock, flags);
+			goto broadcast_aen_retry;
+		}
+
+		/* see if IO is still owned by IOC and target */
+		if (mpi_reply->ResponseCode ==
 		     MPI2_SCSITASKMGMT_RSP_TM_SUCCEEDED ||
 		     mpi_reply->ResponseCode ==
-		     MPI2_SCSITASKMGMT_RSP_IO_QUEUED_ON_IOC)) {
+		     MPI2_SCSITASKMGMT_RSP_IO_QUEUED_ON_IOC) {
 			spin_lock_irqsave(&ioc->scsi_lookup_lock, flags);
 			continue;
 		}
+		task_abort_retries = 0;
+ tm_retry:
+		if (task_abort_retries++ == 60) {
+			dewtprintk(ioc, printk(MPT2SAS_INFO_FMT
+			    "%s: ABORT_TASK: giving up\n", ioc->name,
+			    __func__));
+			spin_lock_irqsave(&ioc->scsi_lookup_lock, flags);
+			goto broadcast_aen_retry;
+		}
+
+		if (ioc->ioc_reset_in_progress_status)
+			goto out_no_lock;
+
 		r = mpt2sas_scsih_issue_tm(ioc, handle, sdev->channel, sdev->id,
 		    sdev->lun, MPI2_SCSITASKMGMT_TASKTYPE_ABORT_TASK, smid, 30,
-		    scmd);
-		if (r == FAILED)
-			sdev_printk(KERN_WARNING, sdev, "task abort: FAILED "
+		    scmd->serial_number, TM_MUTEX_OFF);
+		if (r == FAILED) {
+			sdev_printk(KERN_WARNING, sdev,
+			    "mpt2sas_scsih_issue_tm: ABORT_TASK: FAILED : "
 			    "scmd(%p)\n", scmd);
+			goto tm_retry;
+		}
+
+		if (task_abort_retries > 1)
+			sdev_printk(KERN_WARNING, sdev,
+			    "mpt2sas_scsih_issue_tm: ABORT_TASK: RETRIES (%d):"
+			    " scmd(%p)\n",
+			    task_abort_retries - 1, scmd);
+
 		termination_count += le32_to_cpu(mpi_reply->TerminationCount);
 		spin_lock_irqsave(&ioc->scsi_lookup_lock, flags);
 	}
+
+	if (ioc->broadcast_aen_pending) {
+		dewtprintk(ioc, printk(MPT2SAS_INFO_FMT "%s: loop back due to"
+		     " pending AEN\n", ioc->name, __func__));
+		 ioc->broadcast_aen_pending = 0;
+		 goto broadcast_aen_retry;
+	}
+
+ out:
 	spin_unlock_irqrestore(&ioc->scsi_lookup_lock, flags);
+ out_no_lock:
 
-	dtmprintk(ioc, printk(MPT2SAS_INFO_FMT
+	dewtprintk(ioc, printk(MPT2SAS_INFO_FMT
 	    "%s - exit, query_count = %d termination_count = %d\n",
 	    ioc->name, __func__, query_count, termination_count));
+
+	ioc->broadcast_aen_busy = 0;
+	if (!ioc->ioc_reset_in_progress_status)
+		_scsih_ublock_io_all_device(ioc);
+	mutex_unlock(&ioc->tm_cmds.mutex);
 }
 
 /**
@@ -6566,7 +6701,7 @@ _scsih_search_responding_expanders(struct MPT2SAS_ADAPTER *ioc)
 	Mpi2ExpanderPage0_t expander_pg0;
 	Mpi2ConfigReply_t mpi_reply;
 	u16 ioc_status;
-	__le64 sas_address;
+	u64 sas_address;
 	u16 handle;
 
 	printk(MPT2SAS_INFO_FMT "%s\n", ioc->name, __func__);
@@ -6862,10 +6997,14 @@ mpt2sas_scsih_event_callback(struct MPT2SAS_ADAPTER *ioc, u8 msix_index,
 		    mpi_reply->EventData;
 
 		if (baen_data->Primitive !=
-		    MPI2_EVENT_PRIMITIVE_ASYNCHRONOUS_EVENT ||
-		    ioc->broadcast_aen_busy)
+		    MPI2_EVENT_PRIMITIVE_ASYNCHRONOUS_EVENT)
 			return 1;
-		ioc->broadcast_aen_busy = 1;
+
+		if (ioc->broadcast_aen_busy) {
+			ioc->broadcast_aen_pending++;
+			return 1;
+		} else
+			ioc->broadcast_aen_busy = 1;
 		break;
 	}
 
@@ -7211,7 +7350,6 @@ _scsih_remove(struct pci_dev *pdev)
 	}
 
 	sas_remove_host(shost);
-	_scsih_shutdown(pdev);
 	list_del(&ioc->list);
 	scsi_remove_host(shost);
 	scsi_host_put(shost);
@@ -7436,6 +7574,25 @@ _scsih_probe(struct pci_dev *pdev, const struct pci_device_id *id)
 	shost->transportt = mpt2sas_transport_template;
 	shost->unique_id = ioc->id;
 
+	if (max_sectors != 0xFFFF) {
+		if (max_sectors < 64) {
+			shost->max_sectors = 64;
+			printk(MPT2SAS_WARN_FMT "Invalid value %d passed "
+			    "for max_sectors, range is 64 to 8192. Assigning "
+			    "value of 64.\n", ioc->name, max_sectors);
+		} else if (max_sectors > 8192) {
+			shost->max_sectors = 8192;
+			printk(MPT2SAS_WARN_FMT "Invalid value %d passed "
+			    "for max_sectors, range is 64 to 8192. Assigning "
+			    "default value of 8192.\n", ioc->name,
+			    max_sectors);
+		} else {
+			shost->max_sectors = max_sectors & 0xFFFE;
+			printk(MPT2SAS_INFO_FMT "The max_sectors value is "
+			    "set to %d\n", ioc->name, shost->max_sectors);
+		}
+	}
+
 	if ((scsi_add_host(shost, &pdev->dev))) {
 		printk(MPT2SAS_ERR_FMT "failure at %s:%d/%s()!\n",
 		    ioc->name, __FILE__, __LINE__, __func__);
@@ -7505,7 +7662,7 @@ _scsih_suspend(struct pci_dev *pdev, pm_message_t state)
 {
 	struct Scsi_Host *shost = pci_get_drvdata(pdev);
 	struct MPT2SAS_ADAPTER *ioc = shost_priv(shost);
-	u32 device_state;
+	pci_power_t device_state;
 
 	mpt2sas_base_stop_watchdog(ioc);
 	scsi_block_requests(shost);
@@ -7532,7 +7689,7 @@ _scsih_resume(struct pci_dev *pdev)
 {
 	struct Scsi_Host *shost = pci_get_drvdata(pdev);
 	struct MPT2SAS_ADAPTER *ioc = shost_priv(shost);
-	u32 device_state = pdev->current_state;
+	pci_power_t device_state = pdev->current_state;
 	int r;
 
 	printk(MPT2SAS_INFO_FMT "pdev=0x%p, slot=%s, previous "