diff --git a/drivers/message/fusion/mptbase.c b/drivers/message/fusion/mptbase.c
index 7ef86cb..8cf0f51 100644
--- a/drivers/message/fusion/mptbase.c
+++ b/drivers/message/fusion/mptbase.c
@@ -102,8 +102,6 @@
 /*
  *  Public data...
  */
-int mpt_lan_index = -1;
-int mpt_stm_index = -1;
 
 struct proc_dir_entry *mpt_proc_root_dir;
 
@@ -125,11 +123,14 @@
 static MPT_RESETHANDLER		 MptResetHandlers[MPT_MAX_PROTOCOL_DRIVERS];
 static struct mpt_pci_driver 	*MptDeviceDriverHandlers[MPT_MAX_PROTOCOL_DRIVERS];
 
-static int	mpt_base_index = -1;
-static int	last_drv_idx = -1;
-
 static DECLARE_WAIT_QUEUE_HEAD(mpt_waitq);
 
+/*
+ *  Driver Callback Index's
+ */
+static u8 mpt_base_index = MPT_MAX_PROTOCOL_DRIVERS;
+static u8 last_drv_idx;
+
 /*=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=*/
 /*
  *  Forward protos...
@@ -235,6 +236,23 @@
 	return 0;
 }
 
+/**
+ *	mpt_get_cb_idx - obtain cb_idx for registered driver
+ *	@dclass: class driver enum
+ *
+ *	Returns cb_idx, or zero means it wasn't found
+ **/
+static u8
+mpt_get_cb_idx(MPT_DRIVER_CLASS dclass)
+{
+	u8 cb_idx;
+
+	for (cb_idx = MPT_MAX_PROTOCOL_DRIVERS-1; cb_idx; cb_idx--)
+		if (MptDriverClass[cb_idx] == dclass)
+			return cb_idx;
+	return 0;
+}
+
 /*
  *  Process turbo (context) reply...
  */
@@ -243,8 +261,8 @@
 {
 	MPT_FRAME_HDR *mf = NULL;
 	MPT_FRAME_HDR *mr = NULL;
-	int req_idx = 0;
-	int cb_idx;
+	u16 req_idx = 0;
+	u8 cb_idx;
 
 	dmfprintk(ioc, printk(MYIOC_s_DEBUG_FMT "Got TURBO reply req_idx=%08x\n",
 				ioc->name, pa));
@@ -256,7 +274,7 @@
 		mf = MPT_INDEX_2_MFPTR(ioc, req_idx);
 		break;
 	case MPI_CONTEXT_REPLY_TYPE_LAN:
-		cb_idx = mpt_lan_index;
+		cb_idx = mpt_get_cb_idx(MPTLAN_DRIVER);
 		/*
 		 *  Blind set of mf to NULL here was fatal
 		 *  after lan_reply says "freeme"
@@ -277,7 +295,7 @@
 		mr = (MPT_FRAME_HDR *) CAST_U32_TO_PTR(pa);
 		break;
 	case MPI_CONTEXT_REPLY_TYPE_SCSI_TARGET:
-		cb_idx = mpt_stm_index;
+		cb_idx = mpt_get_cb_idx(MPTSTM_DRIVER);
 		mr = (MPT_FRAME_HDR *) CAST_U32_TO_PTR(pa);
 		break;
 	default:
@@ -286,7 +304,7 @@
 	}
 
 	/*  Check for (valid) IO callback!  */
-	if (cb_idx < 1 || cb_idx >= MPT_MAX_PROTOCOL_DRIVERS ||
+	if (!cb_idx || cb_idx >= MPT_MAX_PROTOCOL_DRIVERS ||
 			MptCallbacks[cb_idx] == NULL) {
 		printk(MYIOC_s_WARN_FMT "%s: Invalid cb_idx (%d)!\n",
 				__FUNCTION__, ioc->name, cb_idx);
@@ -304,8 +322,8 @@
 {
 	MPT_FRAME_HDR	*mf;
 	MPT_FRAME_HDR	*mr;
-	int		 req_idx;
-	int		 cb_idx;
+	u16		 req_idx;
+	u8		 cb_idx;
 	int		 freeme;
 
 	u32 reply_dma_low;
@@ -350,7 +368,7 @@
 		mpt_iocstatus_info(ioc, (u32)ioc_stat, mf);
 
 	/*  Check for (valid) IO callback!  */
-	if (cb_idx < 1 || cb_idx >= MPT_MAX_PROTOCOL_DRIVERS ||
+	if (!cb_idx || cb_idx >= MPT_MAX_PROTOCOL_DRIVERS ||
 			MptCallbacks[cb_idx] == NULL) {
 		printk(MYIOC_s_WARN_FMT "%s: Invalid cb_idx (%d)!\n",
 				__FUNCTION__, ioc->name, cb_idx);
@@ -563,28 +581,27 @@
  *	in order to register separate callbacks; one for "normal" SCSI IO;
  *	one for MptScsiTaskMgmt requests; one for Scan/DV requests.
  *
- *	Returns a positive integer valued "handle" in the
- *	range (and S.O.D. order) {N,...,7,6,5,...,1} if successful.
- *	Any non-positive return value (including zero!) should be considered
- *	an error by the caller.
+ *	Returns u8 valued "handle" in the range (and S.O.D. order)
+ *	{N,...,7,6,5,...,1} if successful.
+ *	A return value of MPT_MAX_PROTOCOL_DRIVERS (including zero!) should be
+ *	considered an error by the caller.
  */
-int
+u8
 mpt_register(MPT_CALLBACK cbfunc, MPT_DRIVER_CLASS dclass)
 {
-	int i;
-
-	last_drv_idx = -1;
+	u8 cb_idx;
+	last_drv_idx = MPT_MAX_PROTOCOL_DRIVERS;
 
 	/*
 	 *  Search for empty callback slot in this order: {N,...,7,6,5,...,1}
 	 *  (slot/handle 0 is reserved!)
 	 */
-	for (i = MPT_MAX_PROTOCOL_DRIVERS-1; i; i--) {
-		if (MptCallbacks[i] == NULL) {
-			MptCallbacks[i] = cbfunc;
-			MptDriverClass[i] = dclass;
-			MptEvHandlers[i] = NULL;
-			last_drv_idx = i;
+	for (cb_idx = MPT_MAX_PROTOCOL_DRIVERS-1; cb_idx; cb_idx--) {
+		if (MptCallbacks[cb_idx] == NULL) {
+			MptCallbacks[cb_idx] = cbfunc;
+			MptDriverClass[cb_idx] = dclass;
+			MptEvHandlers[cb_idx] = NULL;
+			last_drv_idx = cb_idx;
 			break;
 		}
 	}
@@ -601,9 +618,9 @@
  *	module is unloaded.
  */
 void
-mpt_deregister(int cb_idx)
+mpt_deregister(u8 cb_idx)
 {
-	if ((cb_idx >= 0) && (cb_idx < MPT_MAX_PROTOCOL_DRIVERS)) {
+	if (cb_idx  && (cb_idx < MPT_MAX_PROTOCOL_DRIVERS)) {
 		MptCallbacks[cb_idx] = NULL;
 		MptDriverClass[cb_idx] = MPTUNKNOWN_DRIVER;
 		MptEvHandlers[cb_idx] = NULL;
@@ -625,9 +642,9 @@
  *	Returns 0 for success.
  */
 int
-mpt_event_register(int cb_idx, MPT_EVHANDLER ev_cbfunc)
+mpt_event_register(u8 cb_idx, MPT_EVHANDLER ev_cbfunc)
 {
-	if (cb_idx < 1 || cb_idx >= MPT_MAX_PROTOCOL_DRIVERS)
+	if (!cb_idx  || cb_idx >= MPT_MAX_PROTOCOL_DRIVERS)
 		return -1;
 
 	MptEvHandlers[cb_idx] = ev_cbfunc;
@@ -645,9 +662,9 @@
  *	or when its module is unloaded.
  */
 void
-mpt_event_deregister(int cb_idx)
+mpt_event_deregister(u8 cb_idx)
 {
-	if (cb_idx < 1 || cb_idx >= MPT_MAX_PROTOCOL_DRIVERS)
+	if (!cb_idx  || cb_idx >= MPT_MAX_PROTOCOL_DRIVERS)
 		return;
 
 	MptEvHandlers[cb_idx] = NULL;
@@ -665,9 +682,9 @@
  *	Returns 0 for success.
  */
 int
-mpt_reset_register(int cb_idx, MPT_RESETHANDLER reset_func)
+mpt_reset_register(u8 cb_idx, MPT_RESETHANDLER reset_func)
 {
-	if (cb_idx < 1 || cb_idx >= MPT_MAX_PROTOCOL_DRIVERS)
+	if (!cb_idx || cb_idx >= MPT_MAX_PROTOCOL_DRIVERS)
 		return -1;
 
 	MptResetHandlers[cb_idx] = reset_func;
@@ -684,9 +701,9 @@
  *	or when its module is unloaded.
  */
 void
-mpt_reset_deregister(int cb_idx)
+mpt_reset_deregister(u8 cb_idx)
 {
-	if (cb_idx < 1 || cb_idx >= MPT_MAX_PROTOCOL_DRIVERS)
+	if (!cb_idx || cb_idx >= MPT_MAX_PROTOCOL_DRIVERS)
 		return;
 
 	MptResetHandlers[cb_idx] = NULL;
@@ -699,12 +716,12 @@
  *	@cb_idx: MPT protocol driver index
  */
 int
-mpt_device_driver_register(struct mpt_pci_driver * dd_cbfunc, int cb_idx)
+mpt_device_driver_register(struct mpt_pci_driver * dd_cbfunc, u8 cb_idx)
 {
 	MPT_ADAPTER	*ioc;
 	const struct pci_device_id *id;
 
-	if (cb_idx < 1 || cb_idx >= MPT_MAX_PROTOCOL_DRIVERS)
+	if (!cb_idx  || cb_idx >= MPT_MAX_PROTOCOL_DRIVERS)
 		return -EINVAL;
 
 	MptDeviceDriverHandlers[cb_idx] = dd_cbfunc;
@@ -726,12 +743,12 @@
  *	@cb_idx: MPT protocol driver index
  */
 void
-mpt_device_driver_deregister(int cb_idx)
+mpt_device_driver_deregister(u8 cb_idx)
 {
 	struct mpt_pci_driver *dd_cbfunc;
 	MPT_ADAPTER	*ioc;
 
-	if (cb_idx < 1 || cb_idx >= MPT_MAX_PROTOCOL_DRIVERS)
+	if (!cb_idx  || cb_idx >= MPT_MAX_PROTOCOL_DRIVERS)
 		return;
 
 	dd_cbfunc = MptDeviceDriverHandlers[cb_idx];
@@ -749,14 +766,14 @@
 /**
  *	mpt_get_msg_frame - Obtain a MPT request frame from the pool (of 1024)
  *	allocated per MPT adapter.
- *	@handle: Handle of registered MPT protocol driver
+ *	@cb_idx: Handle of registered MPT protocol driver
  *	@ioc: Pointer to MPT adapter structure
  *
  *	Returns pointer to a MPT request frame or %NULL if none are available
  *	or IOC is not active.
  */
 MPT_FRAME_HDR*
-mpt_get_msg_frame(int handle, MPT_ADAPTER *ioc)
+mpt_get_msg_frame(u8 cb_idx, MPT_ADAPTER *ioc)
 {
 	MPT_FRAME_HDR *mf;
 	unsigned long flags;
@@ -781,7 +798,7 @@
 				u.frame.linkage.list);
 		list_del(&mf->u.frame.linkage.list);
 		mf->u.frame.linkage.arg1 = 0;
-		mf->u.frame.hwhdr.msgctxu.fld.cb_idx = handle;	/* byte */
+		mf->u.frame.hwhdr.msgctxu.fld.cb_idx = cb_idx;	/* byte */
 		req_offset = (u8 *)mf - (u8 *)ioc->req_frames;
 								/* u16! */
 		req_idx = req_offset / ioc->req_sz;
@@ -805,7 +822,7 @@
 #endif
 
 	dmfprintk(ioc, printk(KERN_INFO MYNAM ": %s: mpt_get_msg_frame(%d,%d), got mf=%p\n",
-			ioc->name, handle, ioc->id, mf));
+			ioc->name, cb_idx, ioc->id, mf));
 	return mf;
 }
 
@@ -813,7 +830,7 @@
 /**
  *	mpt_put_msg_frame - Send a protocol specific MPT request frame
  *	to a IOC.
- *	@handle: Handle of registered MPT protocol driver
+ *	@cb_idx: Handle of registered MPT protocol driver
  *	@ioc: Pointer to MPT adapter structure
  *	@mf: Pointer to MPT request frame
  *
@@ -821,14 +838,14 @@
  *	specific MPT adapter.
  */
 void
-mpt_put_msg_frame(int handle, MPT_ADAPTER *ioc, MPT_FRAME_HDR *mf)
+mpt_put_msg_frame(u8 cb_idx, MPT_ADAPTER *ioc, MPT_FRAME_HDR *mf)
 {
 	u32 mf_dma_addr;
 	int req_offset;
 	u16	 req_idx;	/* Request index */
 
 	/* ensure values are reset properly! */
-	mf->u.frame.hwhdr.msgctxu.fld.cb_idx = handle;		/* byte */
+	mf->u.frame.hwhdr.msgctxu.fld.cb_idx = cb_idx;		/* byte */
 	req_offset = (u8 *)mf - (u8 *)ioc->req_frames;
 								/* u16! */
 	req_idx = req_offset / ioc->req_sz;
@@ -845,7 +862,7 @@
 /**
  *	mpt_put_msg_frame_hi_pri - Send a protocol specific MPT request frame
  *	to a IOC using hi priority request queue.
- *	@handle: Handle of registered MPT protocol driver
+ *	@cb_idx: Handle of registered MPT protocol driver
  *	@ioc: Pointer to MPT adapter structure
  *	@mf: Pointer to MPT request frame
  *
@@ -853,14 +870,14 @@
  *	specific MPT adapter.
  **/
 void
-mpt_put_msg_frame_hi_pri(int handle, MPT_ADAPTER *ioc, MPT_FRAME_HDR *mf)
+mpt_put_msg_frame_hi_pri(u8 cb_idx, MPT_ADAPTER *ioc, MPT_FRAME_HDR *mf)
 {
 	u32 mf_dma_addr;
 	int req_offset;
 	u16	 req_idx;	/* Request index */
 
 	/* ensure values are reset properly! */
-	mf->u.frame.hwhdr.msgctxu.fld.cb_idx = handle;
+	mf->u.frame.hwhdr.msgctxu.fld.cb_idx = cb_idx;
 	req_offset = (u8 *)mf - (u8 *)ioc->req_frames;
 	req_idx = req_offset / ioc->req_sz;
 	mf->u.frame.hwhdr.msgctxu.fld.req_idx = cpu_to_le16(req_idx);
@@ -931,7 +948,7 @@
 /*=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=*/
 /**
  *	mpt_send_handshake_request - Send MPT request via doorbell handshake method.
- *	@handle: Handle of registered MPT protocol driver
+ *	@cb_idx: Handle of registered MPT protocol driver
  *	@ioc: Pointer to MPT adapter structure
  *	@reqBytes: Size of the request in bytes
  *	@req: Pointer to MPT request frame
@@ -946,7 +963,7 @@
  *	Returns 0 for success, non-zero for failure.
  */
 int
-mpt_send_handshake_request(int handle, MPT_ADAPTER *ioc, int reqBytes, u32 *req, int sleepFlag)
+mpt_send_handshake_request(u8 cb_idx, MPT_ADAPTER *ioc, int reqBytes, u32 *req, int sleepFlag)
 {
 	int	r = 0;
 	u8	*req_as_bytes;
@@ -966,7 +983,7 @@
 	if (reqBytes >= 12 && ii >= 0 && ii < ioc->req_depth) {
 		MPT_FRAME_HDR *mf = (MPT_FRAME_HDR*)req;
 		mf->u.frame.hwhdr.msgctxu.fld.req_idx = cpu_to_le16(ii);
-		mf->u.frame.hwhdr.msgctxu.fld.cb_idx = handle;
+		mf->u.frame.hwhdr.msgctxu.fld.cb_idx = cb_idx;
 	}
 
 	/* Make sure there are no doorbells */
@@ -1432,6 +1449,7 @@
 	u32		 msize;
 	u32		 psize;
 	int		 ii;
+	u8		 cb_idx;
 	int		 r = -ENODEV;
 	u8		 revision;
 	u8		 pcixcmd;
@@ -1655,10 +1673,10 @@
 	}
 
 	/* call per device driver probe entry point */
-	for(ii=0; ii<MPT_MAX_PROTOCOL_DRIVERS; ii++) {
-		if(MptDeviceDriverHandlers[ii] &&
-		  MptDeviceDriverHandlers[ii]->probe) {
-			MptDeviceDriverHandlers[ii]->probe(pdev,id);
+	for(cb_idx=0; cb_idx<MPT_MAX_PROTOCOL_DRIVERS; cb_idx++) {
+		if(MptDeviceDriverHandlers[cb_idx] &&
+		  MptDeviceDriverHandlers[cb_idx]->probe) {
+			MptDeviceDriverHandlers[cb_idx]->probe(pdev,id);
 		}
 	}
 
@@ -1695,7 +1713,7 @@
 {
 	MPT_ADAPTER 	*ioc = pci_get_drvdata(pdev);
 	char pname[32];
-	int ii;
+	u8 cb_idx;
 
 	sprintf(pname, MPT_PROCFS_MPTBASEDIR "/%s/summary", ioc->name);
 	remove_proc_entry(pname, NULL);
@@ -1705,10 +1723,10 @@
 	remove_proc_entry(pname, NULL);
 
 	/* call per device driver remove entry point */
-	for(ii=0; ii<MPT_MAX_PROTOCOL_DRIVERS; ii++) {
-		if(MptDeviceDriverHandlers[ii] &&
-		  MptDeviceDriverHandlers[ii]->remove) {
-			MptDeviceDriverHandlers[ii]->remove(pdev);
+	for(cb_idx=0; cb_idx<MPT_MAX_PROTOCOL_DRIVERS; cb_idx++) {
+		if(MptDeviceDriverHandlers[cb_idx] &&
+		  MptDeviceDriverHandlers[cb_idx]->remove) {
+			MptDeviceDriverHandlers[cb_idx]->remove(pdev);
 		}
 	}
 
@@ -1820,7 +1838,7 @@
 #endif
 
 static int
-mpt_signal_reset(int index, MPT_ADAPTER *ioc, int reset_phase)
+mpt_signal_reset(u8 index, MPT_ADAPTER *ioc, int reset_phase)
 {
 	if ((MptDriverClass[index] == MPTSPI_DRIVER &&
 	     ioc->bus_type != SPI) ||
@@ -1862,6 +1880,7 @@
 	int	 hard;
 	int	 rc=0;
 	int	 ii;
+	u8	 cb_idx;
 	int	 handlers;
 	int	 ret = 0;
 	int	 reset_alt_ioc_active = 0;
@@ -2146,20 +2165,20 @@
 	 */
 	if (hard_reset_done) {
 		rc = handlers = 0;
-		for (ii=MPT_MAX_PROTOCOL_DRIVERS-1; ii; ii--) {
-			if ((ret == 0) && MptResetHandlers[ii]) {
+		for (cb_idx = MPT_MAX_PROTOCOL_DRIVERS-1; cb_idx; cb_idx--) {
+			if ((ret == 0) && MptResetHandlers[cb_idx]) {
 				dprintk(ioc, printk(MYIOC_s_DEBUG_FMT
 					"Calling IOC post_reset handler #%d\n",
-					ioc->name, ii));
-				rc += mpt_signal_reset(ii, ioc, MPT_IOC_POST_RESET);
+					ioc->name, cb_idx));
+				rc += mpt_signal_reset(cb_idx, ioc, MPT_IOC_POST_RESET);
 				handlers++;
 			}
 
-			if (alt_ioc_ready && MptResetHandlers[ii]) {
+			if (alt_ioc_ready && MptResetHandlers[cb_idx]) {
 				drsprintk(ioc, printk(MYIOC_s_DEBUG_FMT
 					"Calling alt-%s post_reset handler #%d\n",
-					ioc->name, ioc->alt_ioc->name, ii));
-				rc += mpt_signal_reset(ii, ioc->alt_ioc, MPT_IOC_POST_RESET);
+					ioc->name, ioc->alt_ioc->name, cb_idx));
+				rc += mpt_signal_reset(cb_idx, ioc->alt_ioc, MPT_IOC_POST_RESET);
 				handlers++;
 			}
 		}
@@ -3592,20 +3611,20 @@
 		 * MptResetHandlers[] registered yet.
 		 */
 		{
-			int	 ii;
+			u8	 cb_idx;
 			int	 r = 0;
 
-			for (ii=MPT_MAX_PROTOCOL_DRIVERS-1; ii; ii--) {
-				if (MptResetHandlers[ii]) {
+			for (cb_idx = MPT_MAX_PROTOCOL_DRIVERS-1; cb_idx; cb_idx--) {
+				if (MptResetHandlers[cb_idx]) {
 					dprintk(ioc, printk(MYIOC_s_DEBUG_FMT
 						"Calling IOC pre_reset handler #%d\n",
-						ioc->name, ii));
-					r += mpt_signal_reset(ii, ioc, MPT_IOC_PRE_RESET);
+						ioc->name, cb_idx));
+					r += mpt_signal_reset(cb_idx, ioc, MPT_IOC_PRE_RESET);
 					if (ioc->alt_ioc) {
 						dprintk(ioc, printk(MYIOC_s_DEBUG_FMT
 							"Calling alt-%s pre_reset handler #%d\n",
-							ioc->name, ioc->alt_ioc->name, ii));
-						r += mpt_signal_reset(ii, ioc->alt_ioc, MPT_IOC_PRE_RESET);
+							ioc->name, ioc->alt_ioc->name, cb_idx));
+						r += mpt_signal_reset(cb_idx, ioc->alt_ioc, MPT_IOC_PRE_RESET);
 					}
 				}
 			}
@@ -5907,7 +5926,7 @@
 static int
 procmpt_version_read(char *buf, char **start, off_t offset, int request, int *eof, void *data)
 {
-	int	 ii;
+	u8	 cb_idx;
 	int	 scsi, fc, sas, lan, ctl, targ, dmp;
 	char	*drvname;
 	int	 len;
@@ -5916,10 +5935,10 @@
 	len += sprintf(buf+len, "  Fusion MPT base driver\n");
 
 	scsi = fc = sas = lan = ctl = targ = dmp = 0;
-	for (ii=MPT_MAX_PROTOCOL_DRIVERS-1; ii; ii--) {
+	for (cb_idx=MPT_MAX_PROTOCOL_DRIVERS-1; cb_idx; cb_idx--) {
 		drvname = NULL;
-		if (MptCallbacks[ii]) {
-			switch (MptDriverClass[ii]) {
+		if (MptCallbacks[cb_idx]) {
+			switch (MptDriverClass[cb_idx]) {
 			case MPTSPI_DRIVER:
 				if (!scsi++) drvname = "SPI host";
 				break;
@@ -6163,18 +6182,18 @@
 	 * For all other protocol drivers, this is a no-op.
 	 */
 	{
-		int	 ii;
+		u8	 cb_idx;
 		int	 r = 0;
 
-		for (ii=MPT_MAX_PROTOCOL_DRIVERS-1; ii; ii--) {
-			if (MptResetHandlers[ii]) {
+		for (cb_idx = MPT_MAX_PROTOCOL_DRIVERS-1; cb_idx; cb_idx--) {
+			if (MptResetHandlers[cb_idx]) {
 				dtmprintk(ioc, printk(MYIOC_s_DEBUG_FMT "Calling IOC reset_setup handler #%d\n",
-						ioc->name, ii));
-				r += mpt_signal_reset(ii, ioc, MPT_IOC_SETUP_RESET);
+						ioc->name, cb_idx));
+				r += mpt_signal_reset(cb_idx, ioc, MPT_IOC_SETUP_RESET);
 				if (ioc->alt_ioc) {
 					dtmprintk(ioc, printk(MYIOC_s_DEBUG_FMT "Calling alt-%s setup reset handler #%d\n",
-							ioc->name, ioc->alt_ioc->name, ii));
-					r += mpt_signal_reset(ii, ioc->alt_ioc, MPT_IOC_SETUP_RESET);
+							ioc->name, ioc->alt_ioc->name, cb_idx));
+					r += mpt_signal_reset(cb_idx, ioc->alt_ioc, MPT_IOC_SETUP_RESET);
 				}
 			}
 		}
@@ -6579,6 +6598,7 @@
 	u32 evData0 = 0;
 //	u32 evCtx;
 	int ii;
+	u8 cb_idx;
 	int r = 0;
 	int handlers = 0;
 	char evStr[EVENT_DESCR_STR_SZ];
@@ -6659,11 +6679,11 @@
 	/*
 	 *  Call each currently registered protocol event handler.
 	 */
-	for (ii=MPT_MAX_PROTOCOL_DRIVERS-1; ii; ii--) {
-		if (MptEvHandlers[ii]) {
+	for (cb_idx=MPT_MAX_PROTOCOL_DRIVERS-1; cb_idx; cb_idx--) {
+		if (MptEvHandlers[cb_idx]) {
 			devtverboseprintk(ioc, printk(MYIOC_s_DEBUG_FMT "Routing Event to event handler #%d\n",
-					ioc->name, ii));
-			r += (*(MptEvHandlers[ii]))(ioc, pEventReply);
+					ioc->name, cb_idx));
+			r += (*(MptEvHandlers[cb_idx]))(ioc, pEventReply);
 			handlers++;
 		}
 	}
@@ -7354,8 +7374,6 @@
 EXPORT_SYMBOL(mpt_verify_adapter);
 EXPORT_SYMBOL(mpt_GetIocState);
 EXPORT_SYMBOL(mpt_print_ioc_summary);
-EXPORT_SYMBOL(mpt_lan_index);
-EXPORT_SYMBOL(mpt_stm_index);
 EXPORT_SYMBOL(mpt_HardResetHandler);
 EXPORT_SYMBOL(mpt_config);
 EXPORT_SYMBOL(mpt_findImVolumes);
@@ -7373,16 +7391,16 @@
 static int __init
 fusion_init(void)
 {
-	int i;
+	u8 cb_idx;
 
 	show_mptmod_ver(my_NAME, my_VERSION);
 	printk(KERN_INFO COPYRIGHT "\n");
 
-	for (i = 0; i < MPT_MAX_PROTOCOL_DRIVERS; i++) {
-		MptCallbacks[i] = NULL;
-		MptDriverClass[i] = MPTUNKNOWN_DRIVER;
-		MptEvHandlers[i] = NULL;
-		MptResetHandlers[i] = NULL;
+	for (cb_idx = 0; cb_idx < MPT_MAX_PROTOCOL_DRIVERS; cb_idx++) {
+		MptCallbacks[cb_idx] = NULL;
+		MptDriverClass[cb_idx] = MPTUNKNOWN_DRIVER;
+		MptEvHandlers[cb_idx] = NULL;
+		MptResetHandlers[cb_idx] = NULL;
 	}
 
 	/*  Register ourselves (mptbase) in order to facilitate
diff --git a/drivers/message/fusion/mptbase.h b/drivers/message/fusion/mptbase.h
index 012be5e..04ef0a3 100644
--- a/drivers/message/fusion/mptbase.h
+++ b/drivers/message/fusion/mptbase.h
@@ -679,9 +679,9 @@
 	u8			 reload_fw;	/* Force a FW Reload on next reset */
 	u8			 NBShiftFactor;  /* NB Shift Factor based on Block Size (Facts)  */
 	u8			 pad1[4];
-	int			 DoneCtx;
-	int			 TaskCtx;
-	int			 InternalCtx;
+	u8			 DoneCtx;
+	u8			 TaskCtx;
+	u8			 InternalCtx;
 	spinlock_t		 initializing_hba_lock;
 	int 	 		 initializing_hba_lock_flag;
 	struct list_head	 list;
@@ -883,21 +883,21 @@
 extern int	 mpt_suspend(struct pci_dev *pdev, pm_message_t state);
 extern int	 mpt_resume(struct pci_dev *pdev);
 #endif
-extern int	 mpt_register(MPT_CALLBACK cbfunc, MPT_DRIVER_CLASS dclass);
-extern void	 mpt_deregister(int cb_idx);
-extern int	 mpt_event_register(int cb_idx, MPT_EVHANDLER ev_cbfunc);
-extern void	 mpt_event_deregister(int cb_idx);
-extern int	 mpt_reset_register(int cb_idx, MPT_RESETHANDLER reset_func);
-extern void	 mpt_reset_deregister(int cb_idx);
-extern int	 mpt_device_driver_register(struct mpt_pci_driver * dd_cbfunc, int cb_idx);
-extern void	 mpt_device_driver_deregister(int cb_idx);
-extern MPT_FRAME_HDR	*mpt_get_msg_frame(int handle, MPT_ADAPTER *ioc);
+extern u8	 mpt_register(MPT_CALLBACK cbfunc, MPT_DRIVER_CLASS dclass);
+extern void	 mpt_deregister(u8 cb_idx);
+extern int	 mpt_event_register(u8 cb_idx, MPT_EVHANDLER ev_cbfunc);
+extern void	 mpt_event_deregister(u8 cb_idx);
+extern int	 mpt_reset_register(u8 cb_idx, MPT_RESETHANDLER reset_func);
+extern void	 mpt_reset_deregister(u8 cb_idx);
+extern int	 mpt_device_driver_register(struct mpt_pci_driver * dd_cbfunc, u8 cb_idx);
+extern void	 mpt_device_driver_deregister(u8 cb_idx);
+extern MPT_FRAME_HDR	*mpt_get_msg_frame(u8 cb_idx, MPT_ADAPTER *ioc);
 extern void	 mpt_free_msg_frame(MPT_ADAPTER *ioc, MPT_FRAME_HDR *mf);
-extern void	 mpt_put_msg_frame(int handle, MPT_ADAPTER *ioc, MPT_FRAME_HDR *mf);
-extern void	 mpt_put_msg_frame_hi_pri(int handle, MPT_ADAPTER *ioc, MPT_FRAME_HDR *mf);
+extern void	 mpt_put_msg_frame(u8 cb_idx, MPT_ADAPTER *ioc, MPT_FRAME_HDR *mf);
+extern void	 mpt_put_msg_frame_hi_pri(u8 cb_idx, MPT_ADAPTER *ioc, MPT_FRAME_HDR *mf);
 extern void	 mpt_add_sge(char *pAddr, u32 flagslength, dma_addr_t dma_addr);
 
-extern int	 mpt_send_handshake_request(int handle, MPT_ADAPTER *ioc, int reqBytes, u32 *req, int sleepFlag);
+extern int	 mpt_send_handshake_request(u8 cb_idx, MPT_ADAPTER *ioc, int reqBytes, u32 *req, int sleepFlag);
 extern int	 mpt_verify_adapter(int iocid, MPT_ADAPTER **iocpp);
 extern u32	 mpt_GetIocState(MPT_ADAPTER *ioc, int cooked);
 extern void	 mpt_print_ioc_summary(MPT_ADAPTER *ioc, char *buf, int *size, int len, int showlan);
@@ -915,9 +915,6 @@
 extern struct list_head	  ioc_list;
 extern struct proc_dir_entry	*mpt_proc_root_dir;
 
-extern int		  mpt_lan_index;	/* needed by mptlan.c */
-extern int		  mpt_stm_index;	/* needed by mptstm.c */
-
 /*=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=*/
 #endif		/* } __KERNEL__ */
 
diff --git a/drivers/message/fusion/mptctl.c b/drivers/message/fusion/mptctl.c
index dce1e9c..89cab57 100644
--- a/drivers/message/fusion/mptctl.c
+++ b/drivers/message/fusion/mptctl.c
@@ -83,7 +83,7 @@
 
 /*=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=*/
 
-static int mptctl_id = -1;
+static u8 mptctl_id = MPT_MAX_PROTOCOL_DRIVERS;
 
 static DECLARE_WAIT_QUEUE_HEAD ( mptctl_wait );
 
@@ -2936,7 +2936,8 @@
 	 *  Install our handler
 	 */
 	++where;
-	if ((mptctl_id = mpt_register(mptctl_reply, MPTCTL_DRIVER)) < 0) {
+	mptctl_id = mpt_register(mptctl_reply, MPTCTL_DRIVER);
+	if (!mptctl_id || mptctl_id >= MPT_MAX_PROTOCOL_DRIVERS) {
 		printk(KERN_ERR MYNAM ": ERROR: Failed to register with Fusion MPT base driver\n");
 		misc_deregister(&mptctl_miscdev);
 		err = -EBUSY;
diff --git a/drivers/message/fusion/mptfc.c b/drivers/message/fusion/mptfc.c
index 8422c25..2b3e27a 100644
--- a/drivers/message/fusion/mptfc.c
+++ b/drivers/message/fusion/mptfc.c
@@ -90,9 +90,9 @@
 module_param(max_lun, int, 0);
 MODULE_PARM_DESC(max_lun, " max lun, default=16895 ");
 
-static int	mptfcDoneCtx = -1;
-static int	mptfcTaskCtx = -1;
-static int	mptfcInternalCtx = -1; /* Used only for internal commands */
+static u8	mptfcDoneCtx = MPT_MAX_PROTOCOL_DRIVERS;
+static u8	mptfcTaskCtx = MPT_MAX_PROTOCOL_DRIVERS;
+static u8	mptfcInternalCtx = MPT_MAX_PROTOCOL_DRIVERS;
 
 static int mptfc_target_alloc(struct scsi_target *starget);
 static int mptfc_slave_alloc(struct scsi_device *sdev);
diff --git a/drivers/message/fusion/mptlan.c b/drivers/message/fusion/mptlan.c
index 01fc397..9d9eb76 100644
--- a/drivers/message/fusion/mptlan.c
+++ b/drivers/message/fusion/mptlan.c
@@ -154,7 +154,7 @@
 /*
  *  Fusion MPT LAN private data
  */
-static int LanCtx = -1;
+static u8 LanCtx = MPT_MAX_PROTOCOL_DRIVERS;
 
 static u32 max_buckets_out = 127;
 static u32 tx_max_out_p = 127 - 16;
@@ -165,12 +165,6 @@
 #endif
 
 /*=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=*/
-/*
- * Fusion MPT LAN external data
- */
-extern int mpt_lan_index;
-
-/*=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=*/
 /**
  *	lan_reply - Handle all data sent from the hardware.
  *	@ioc: Pointer to MPT_ADAPTER structure
@@ -1510,9 +1504,6 @@
 		return -EBUSY;
 	}
 
-	/* Set the callback index to be used by driver core for turbo replies */
-	mpt_lan_index = LanCtx;
-
 	dlprintk((KERN_INFO MYNAM ": assigned context of %d\n", LanCtx));
 
 	if (mpt_reset_register(LanCtx, mpt_lan_ioc_reset)) {
@@ -1533,10 +1524,9 @@
 	mpt_device_driver_deregister(MPTLAN_DRIVER);
 	mpt_reset_deregister(LanCtx);
 
-	if (LanCtx >= 0) {
+	if (LanCtx) {
 		mpt_deregister(LanCtx);
-		LanCtx = -1;
-		mpt_lan_index = 0;
+		LanCtx = MPT_MAX_PROTOCOL_DRIVERS;
 	}
 }
 
diff --git a/drivers/message/fusion/mptsas.c b/drivers/message/fusion/mptsas.c
index fe3b505..ffbf0e5 100644
--- a/drivers/message/fusion/mptsas.c
+++ b/drivers/message/fusion/mptsas.c
@@ -89,10 +89,10 @@
 module_param(max_lun, int, 0);
 MODULE_PARM_DESC(max_lun, " max lun, default=16895 ");
 
-static int	mptsasDoneCtx = -1;
-static int	mptsasTaskCtx = -1;
-static int	mptsasInternalCtx = -1; /* Used only for internal commands */
-static int	mptsasMgmtCtx = -1;
+static u8	mptsasDoneCtx = MPT_MAX_PROTOCOL_DRIVERS;
+static u8	mptsasTaskCtx = MPT_MAX_PROTOCOL_DRIVERS;
+static u8	mptsasInternalCtx = MPT_MAX_PROTOCOL_DRIVERS; /* Used only for internal commands */
+static u8	mptsasMgmtCtx = MPT_MAX_PROTOCOL_DRIVERS;
 
 static void mptsas_hotplug_work(struct work_struct *work);
 
diff --git a/drivers/message/fusion/mptspi.c b/drivers/message/fusion/mptspi.c
index 25df3bf..f0618c5 100644
--- a/drivers/message/fusion/mptspi.c
+++ b/drivers/message/fusion/mptspi.c
@@ -90,9 +90,9 @@
 
 static struct scsi_transport_template *mptspi_transport_template = NULL;
 
-static int	mptspiDoneCtx = -1;
-static int	mptspiTaskCtx = -1;
-static int	mptspiInternalCtx = -1; /* Used only for internal commands */
+static u8	mptspiDoneCtx = MPT_MAX_PROTOCOL_DRIVERS;
+static u8	mptspiTaskCtx = MPT_MAX_PROTOCOL_DRIVERS;
+static u8	mptspiInternalCtx = MPT_MAX_PROTOCOL_DRIVERS; /* Used only for internal commands */
 
 /**
  * 	mptspi_setTargetNegoParms  - Update the target negotiation parameters