isci: unify port data structures

Make scic_sds_port a member of isci_port and merge their lifetimes which
means removing the port table from scic_sds_controller in favor of the
one at the isci_host level.  Merge ihost->sas_ports into ihost->ports.
_
Reported-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>

diff --git a/drivers/scsi/isci/core/scic_sds_controller.c b/drivers/scsi/isci/core/scic_sds_controller.c
index 4ad31550c8ae77e11ac554fcf8fe33756dd60a1a..4179bdf3eda785ee18ec04283bf54cb1f171951e 100644 (file)
--- a/drivers/scsi/isci/core/scic_sds_controller.c
+++ b/drivers/scsi/isci/core/scic_sds_controller.c
@@ -623,9 +623,10 @@ static enum sci_status scic_sds_controller_stop_ports(struct scic_sds_controller
        u32 index;
        enum sci_status port_status;
        enum sci_status status = SCI_SUCCESS;
+       struct isci_host *ihost = scic_to_ihost(scic);
 
        for (index = 0; index < scic->logical_port_entries; index++) {
-               struct scic_sds_port *sci_port = &scic->port_table[index];
+               struct scic_sds_port *sci_port = &ihost->ports[index].sci;
                scic_sds_port_handler_t stop;
 
                stop = sci_port->state_handlers->stop_handler;
@@ -2686,7 +2687,7 @@ enum sci_status scic_controller_initialize(struct scic_sds_controller *scic)
                     (result == SCI_SUCCESS);
                     index++) {
                        result = scic_sds_port_initialize(
-                               &scic->port_table[index],
+                               &ihost->ports[index].sci,
                                &scic->scu_registers->peg0.ptsg.port[index],
                                &scic->scu_registers->peg0.ptsg.protocol_engine,
                                &scic->scu_registers->peg0.viit[index]);
@@ -2709,8 +2710,9 @@ enum sci_status scic_controller_initialize(struct scic_sds_controller *scic)
 }
 
 enum sci_status scic_controller_start(struct scic_sds_controller *scic,
-               u32 timeout)
+                                     u32 timeout)
 {
+       struct isci_host *ihost = scic_to_ihost(scic);
        enum sci_status result;
        u16 index;
 
@@ -2752,10 +2754,9 @@ enum sci_status scic_controller_start(struct scic_sds_controller *scic,
 
        /* Start all of the ports on this controller */
        for (index = 0; index < scic->logical_port_entries; index++) {
-               struct scic_sds_port *sci_port = &scic->port_table[index];
+               struct scic_sds_port *sci_port = &ihost->ports[index].sci;
 
-               result = sci_port->state_handlers->start_handler(
-                               sci_port);
+               result = sci_port->state_handlers->start_handler(sci_port);
                if (result)
                        return result;
        }
@@ -2944,14 +2945,14 @@ enum sci_status scic_controller_construct(struct scic_sds_controller *scic,
 
        /* Construct the ports for this controller */
        for (i = 0; i < SCI_MAX_PORTS; i++)
-               scic_sds_port_construct(&scic->port_table[i], i, scic);
-       scic_sds_port_construct(&scic->port_table[i], SCIC_SDS_DUMMY_PORT, scic);
+               scic_sds_port_construct(&ihost->ports[i].sci, i, scic);
+       scic_sds_port_construct(&ihost->ports[i].sci, SCIC_SDS_DUMMY_PORT, scic);
 
        /* Construct the phys for this controller */
        for (i = 0; i < SCI_MAX_PHYS; i++) {
                /* Add all the PHYs to the dummy port */
                scic_sds_phy_construct(&ihost->phys[i].sci,
-                                      &scic->port_table[SCI_MAX_PORTS], i);
+                                      &ihost->ports[SCI_MAX_PORTS].sci, i);
        }
 
        scic->invalid_phy_mask = 0;

diff --git a/drivers/scsi/isci/core/scic_sds_controller.h b/drivers/scsi/isci/core/scic_sds_controller.h
index aaaf15ab7cfb123e04aa7a6dcafaa313b14e2d43..0d5047319cbf6d6283df02e551d5e73a787e94d4 100644 (file)
--- a/drivers/scsi/isci/core/scic_sds_controller.h
+++ b/drivers/scsi/isci/core/scic_sds_controller.h
@@ -160,13 +160,6 @@ struct scic_sds_controller {
         */
        struct scic_sds_port_configuration_agent port_agent;
 
-       /**
-        * This field is the array of port objects that are controlled by this
-        * controller object.  There is one dummy port object also contained within
-        * this controller object.
-        */
-       struct scic_sds_port port_table[SCI_MAX_PORTS + 1];
-
        /**
         * This field is the array of device objects that are currently constructed
         * for this controller object.  This table is used as a fast lookup of device

diff --git a/drivers/scsi/isci/core/scic_sds_port.c b/drivers/scsi/isci/core/scic_sds_port.c
index 84b8abb421a3816f0378f9780b0194aa99d959a4..01288dd44fb690dc37b069bb22b8e4d6721d9be7 100644 (file)
--- a/drivers/scsi/isci/core/scic_sds_port.c
+++ b/drivers/scsi/isci/core/scic_sds_port.c
@@ -283,18 +283,14 @@ static enum sci_status scic_sds_port_clear_phy(
        struct scic_sds_phy *phy)
 {
        /* Make sure that this phy is part of this port */
-       if (
-               (port->phy_table[phy->phy_index] == phy)
-               && (scic_sds_phy_get_port(phy) == port)
-               ) {
-               /* Yep it is assigned to this port so remove it */
-               scic_sds_phy_set_port(
-                       phy,
-                       &scic_sds_port_get_controller(port)->port_table[SCI_MAX_PORTS]
-                       );
+       if (port->phy_table[phy->phy_index] == phy &&
+           scic_sds_phy_get_port(phy) == port) {
+               struct scic_sds_controller *scic = port->owning_controller;
+               struct isci_host *ihost = scic_to_ihost(scic);
 
+               /* Yep it is assigned to this port so remove it */
+               scic_sds_phy_set_port(phy, &ihost->ports[SCI_MAX_PORTS].sci);
                port->phy_table[phy->phy_index] = NULL;
-
                return SCI_SUCCESS;
        }
 
@@ -643,7 +639,7 @@ void scic_sds_port_deactivate_phy(struct scic_sds_port *sci_port,
                                  bool do_notify_user)
 {
        struct scic_sds_controller *scic = scic_sds_port_get_controller(sci_port);
-       struct isci_port *iport = sci_port->iport;
+       struct isci_port *iport = sci_port_to_iport(sci_port);
        struct isci_host *ihost = scic_to_ihost(scic);
        struct isci_phy *iphy = sci_phy_to_iphy(sci_phy);
 
@@ -1620,10 +1616,9 @@ static void scic_sds_port_ready_substate_operational_enter(void *object)
 {
        u32 index;
        struct scic_sds_port *sci_port = object;
-       struct scic_sds_controller *scic =
-               scic_sds_port_get_controller(sci_port);
+       struct scic_sds_controller *scic = sci_port->owning_controller;
        struct isci_host *ihost = scic_to_ihost(scic);
-       struct isci_port *iport = sci_port->iport;
+       struct isci_port *iport = sci_port_to_iport(sci_port);
 
        scic_sds_port_set_ready_state_handlers(
                        sci_port,
@@ -1661,10 +1656,9 @@ static void scic_sds_port_ready_substate_operational_enter(void *object)
 static void scic_sds_port_ready_substate_operational_exit(void *object)
 {
        struct scic_sds_port *sci_port = object;
-       struct scic_sds_controller *scic =
-               scic_sds_port_get_controller(sci_port);
+       struct scic_sds_controller *scic = sci_port->owning_controller;
        struct isci_host *ihost = scic_to_ihost(scic);
-       struct isci_port *iport = sci_port->iport;
+       struct isci_port *iport = sci_port_to_iport(sci_port);
 
        /*
         * Kill the dummy task for this port if it has not yet posted
@@ -1692,10 +1686,9 @@ static void scic_sds_port_ready_substate_operational_exit(void *object)
 static void scic_sds_port_ready_substate_configuring_enter(void *object)
 {
        struct scic_sds_port *sci_port = object;
-       struct scic_sds_controller *scic =
-               scic_sds_port_get_controller(sci_port);
+       struct scic_sds_controller *scic = sci_port->owning_controller;
        struct isci_host *ihost = scic_to_ihost(scic);
-       struct isci_port *iport = sci_port->iport;
+       struct isci_port *iport = sci_port_to_iport(sci_port);
 
        scic_sds_port_set_ready_state_handlers(
                        sci_port,
@@ -2259,7 +2252,7 @@ static void scic_sds_port_ready_state_enter(void *object)
        struct scic_sds_port *sci_port = object;
        struct scic_sds_controller *scic = sci_port->owning_controller;
        struct isci_host *ihost = scic_to_ihost(scic);
-       struct isci_port *iport = sci_port->iport;
+       struct isci_port *iport = sci_port_to_iport(sci_port);
        u32 prev_state;
 
        /* Put the ready state handlers in place though they will not be there long */
@@ -2366,7 +2359,7 @@ scic_sds_port_stopping_state_exit(void *object)
 static void scic_sds_port_failed_state_enter(void *object)
 {
        struct scic_sds_port *sci_port = object;
-       struct isci_port *iport = sci_port->iport;
+       struct isci_port *iport = sci_port_to_iport(sci_port);
 
        scic_sds_port_set_base_state_handlers(sci_port,
                                              SCI_BASE_PORT_STATE_FAILED);
@@ -2398,11 +2391,9 @@ static const struct sci_base_state scic_sds_port_state_table[] = {
        }
 };
 
-void scic_sds_port_construct(struct scic_sds_port *sci_port, u8 port_index,
+void scic_sds_port_construct(struct scic_sds_port *sci_port, u8 index,
                             struct scic_sds_controller *scic)
 {
-       u32 index;
-
        sci_base_state_machine_construct(&sci_port->state_machine,
                                         sci_port,
                                         scic_sds_port_state_table,
@@ -2416,7 +2407,7 @@ void scic_sds_port_construct(struct scic_sds_port *sci_port, u8 port_index,
                                         SCIC_SDS_PORT_READY_SUBSTATE_WAITING);
 
        sci_port->logical_port_index  = SCIC_SDS_DUMMY_PORT;
-       sci_port->physical_port_index = port_index;
+       sci_port->physical_port_index = index;
        sci_port->active_phy_mask     = 0;
 
        sci_port->owning_controller = scic;
@@ -2428,7 +2419,6 @@ void scic_sds_port_construct(struct scic_sds_port *sci_port, u8 port_index,
        sci_port->reserved_tci = SCU_DUMMY_INDEX;
 
        sci_port->timer_handle = NULL;
-
        sci_port->port_task_scheduler_registers = NULL;
 
        for (index = 0; index < SCI_MAX_PHYS; index++)

diff --git a/drivers/scsi/isci/core/scic_sds_port.h b/drivers/scsi/isci/core/scic_sds_port.h
index 213d42330b4b951d604476c2e81d03812ad3c76d..3633561b686a7958849faba2adbdb8f52e323015 100644 (file)
--- a/drivers/scsi/isci/core/scic_sds_port.h
+++ b/drivers/scsi/isci/core/scic_sds_port.h
@@ -151,17 +151,12 @@ enum scic_sds_port_states {
 
 };
 
-struct isci_port;
 /**
  * struct scic_sds_port
  *
  * The core port object provides the the abstraction for an SCU port.
  */
 struct scic_sds_port {
-       /**
-        * The field specifies the peer object for the port.
-        */
-       struct isci_port *iport;
 
        /**
         * This field contains the information for the base port state machine.

diff --git a/drivers/scsi/isci/core/scic_sds_port_configuration_agent.c b/drivers/scsi/isci/core/scic_sds_port_configuration_agent.c
index aa7ac95ecbc6d2af97051c80ef4e5c2129072f35..2d3d067396d35dfbb21d1343691ef49ba936aba9 100644 (file)
--- a/drivers/scsi/isci/core/scic_sds_port_configuration_agent.c
+++ b/drivers/scsi/isci/core/scic_sds_port_configuration_agent.c
@@ -141,14 +141,15 @@ static struct scic_sds_port *scic_sds_port_configuration_agent_find_port(
        scic_sds_phy_get_attached_sas_address(phy, &phy_attached_device_address);
 
        for (i = 0; i < scic->logical_port_entries; i++) {
-               struct scic_sds_port *port = &scic->port_table[i];
+               struct isci_host *ihost = scic_to_ihost(scic);
+               struct scic_sds_port *sci_port = &ihost->ports[i].sci;
 
-               scic_sds_port_get_sas_address(port, &port_sas_address);
-               scic_sds_port_get_attached_sas_address(port, &port_attached_device_address);
+               scic_sds_port_get_sas_address(sci_port, &port_sas_address);
+               scic_sds_port_get_attached_sas_address(sci_port, &port_attached_device_address);
 
-               if ((sci_sas_address_compare(port_sas_address, phy_sas_address) == 0) &&
-                   (sci_sas_address_compare(port_attached_device_address, phy_attached_device_address) == 0))
-                       return port;
+               if (sci_sas_address_compare(port_sas_address, phy_sas_address) == 0 &&
+                   sci_sas_address_compare(port_attached_device_address, phy_attached_device_address) == 0)
+                       return sci_port;
        }
 
        return NULL;
@@ -324,7 +325,7 @@ static enum sci_status scic_sds_mpc_agent_validate_phy_configuration(
                        port_agent->phy_valid_port_range[phy_index].min_index = port_index;
                        port_agent->phy_valid_port_range[phy_index].max_index = phy_index;
 
-                       scic_sds_port_add_phy(&controller->port_table[port_index],
+                       scic_sds_port_add_phy(&ihost->ports[port_index].sci,
                                              &ihost->phys[phy_index].sci);
 
                        assigned_phy_mask |= (1 << phy_index);
@@ -550,6 +551,7 @@ static void scic_sds_apc_agent_configure_ports(
        enum sci_status status;
        struct scic_sds_port *port;
        enum SCIC_SDS_APC_ACTIVITY apc_activity = SCIC_SDS_APC_SKIP_PHY;
+       struct isci_host *ihost = scic_to_ihost(controller);
 
        port = scic_sds_port_configuration_agent_find_port(controller, phy);
 
@@ -571,7 +573,7 @@ static void scic_sds_apc_agent_configure_ports(
                        port_index++
                        ) {
 
-                       port = &controller->port_table[port_index];
+                       port = &ihost->ports[port_index].sci;
 
                        /* First we must make sure that this PHY can be added to this Port. */
                        if (scic_sds_port_is_valid_phy_assignment(port, phy->phy_index)) {

diff --git a/drivers/scsi/isci/host.c b/drivers/scsi/isci/host.c
index d180ad8a8bcf57d71b83e34ed7988da863974f97..cdd99304c363aab29d0c95566a7805f7f5eba6a6 100644 (file)
--- a/drivers/scsi/isci/host.c
+++ b/drivers/scsi/isci/host.c
@@ -277,10 +277,10 @@ void isci_host_deinit(struct isci_host *ihost)
 
        isci_host_change_state(ihost, isci_stopping);
        for (i = 0; i < SCI_MAX_PORTS; i++) {
-               struct isci_port *port = &ihost->isci_ports[i];
+               struct isci_port *iport = &ihost->ports[i];
                struct isci_remote_device *idev, *d;
 
-               list_for_each_entry_safe(idev, d, &port->remote_dev_list, node) {
+               list_for_each_entry_safe(idev, d, &iport->remote_dev_list, node) {
                        isci_remote_device_change_state(idev, isci_stopping);
                        isci_remote_device_stop(ihost, idev);
                }
@@ -442,7 +442,7 @@ int isci_host_init(struct isci_host *isci_host)
                return -ENOMEM;
 
        for (i = 0; i < SCI_MAX_PORTS; i++)
-               isci_port_init(&isci_host->isci_ports[i], isci_host, i);
+               isci_port_init(&isci_host->ports[i], isci_host, i);
 
        for (i = 0; i < SCI_MAX_PHYS; i++)
                isci_phy_init(&isci_host->phys[i], isci_host, i);

diff --git a/drivers/scsi/isci/host.h b/drivers/scsi/isci/host.h
index 00e4854e20d90490568dd00dfc4f76b81dcdb875..5a414c31a877451e6f4b79409675418e6f8599e7 100644 (file)
--- a/drivers/scsi/isci/host.h
+++ b/drivers/scsi/isci/host.h
@@ -84,12 +84,7 @@ struct isci_host {
        struct dma_pool *dma_pool;
        unsigned int dma_pool_alloc_size;
        struct isci_phy phys[SCI_MAX_PHYS];
-
-       /* isci_ports and sas_ports are implicitly parallel to the
-        * ports maintained by the core
-        */
-       struct isci_port isci_ports[SCI_MAX_PORTS];
-       struct asd_sas_port sas_ports[SCI_MAX_PORTS];
+       struct isci_port ports[SCI_MAX_PORTS + 1]; /* includes dummy port */
        struct sas_ha_struct sas_ha;
 
        int can_queue;

diff --git a/drivers/scsi/isci/init.c b/drivers/scsi/isci/init.c
index a5d5c0b97d00735f9fa643bd9f08d4c3e1877337..522d39f9e1320d08d7fb1744e5e920163ea31411 100644 (file)
--- a/drivers/scsi/isci/init.c
+++ b/drivers/scsi/isci/init.c
@@ -221,8 +221,8 @@ static int isci_register_sas_ha(struct isci_host *isci_host)
 
        /* set the array of phy and port structs.  */
        for (i = 0; i < SCI_MAX_PHYS; i++) {
-               sas_phys[i] = &(isci_host->phys[i].sas_phy);
-               sas_ports[i] = &(isci_host->sas_ports[i]);
+               sas_phys[i] = &isci_host->phys[i].sas_phy;
+               sas_ports[i] = &isci_host->ports[i].sas_port;
        }
 
        sas_ha->sas_phy  = sas_phys;

diff --git a/drivers/scsi/isci/port.c b/drivers/scsi/isci/port.c
index 5e87fedb56763f031b40d4b5881ca4530ff432ef..35e2e517f67154171a1915a432178fee6c41ea1f 100644 (file)
--- a/drivers/scsi/isci/port.c
+++ b/drivers/scsi/isci/port.c
@@ -70,29 +70,30 @@
 #include "request.h"
 #include "core/scic_sds_controller.h"
 
-static void isci_port_change_state(
-       struct isci_port *isci_port,
-       enum isci_status status);
+static void isci_port_change_state(struct isci_port *iport, enum isci_status status)
+{
+       unsigned long flags;
 
+       dev_dbg(&iport->isci_host->pdev->dev,
+               "%s: iport = %p, state = 0x%x\n",
+               __func__, iport, status);
 
+       /* XXX pointless lock */
+       spin_lock_irqsave(&iport->state_lock, flags);
+       iport->status = status;
+       spin_unlock_irqrestore(&iport->state_lock, flags);
+}
 
 void isci_port_init(struct isci_port *iport, struct isci_host *ihost, int index)
 {
-       struct scic_sds_port *sci_port;
-
        INIT_LIST_HEAD(&iport->remote_dev_list);
        INIT_LIST_HEAD(&iport->domain_dev_list);
        spin_lock_init(&iport->state_lock);
        init_completion(&iport->start_complete);
        iport->isci_host = ihost;
        isci_port_change_state(iport, isci_freed);
-
-       sci_port = &ihost->sci.port_table[index];
-       iport->sci_port_handle = sci_port;
-       sci_port->iport = iport;
 }
 
-
 /**
  * isci_port_get_state() - This function gets the status of the port object.
  * @isci_port: This parameter points to the isci_port object
@@ -105,21 +106,6 @@ enum isci_status isci_port_get_state(
        return isci_port->status;
 }
 
-static void isci_port_change_state(
-       struct isci_port *isci_port,
-       enum isci_status status)
-{
-       unsigned long flags;
-
-       dev_dbg(&isci_port->isci_host->pdev->dev,
-               "%s: isci_port = %p, state = 0x%x\n",
-               __func__, isci_port, status);
-
-       spin_lock_irqsave(&isci_port->state_lock, flags);
-       isci_port->status = status;
-       spin_unlock_irqrestore(&isci_port->state_lock, flags);
-}
-
 void isci_port_bc_change_received(struct isci_host *ihost,
                                  struct scic_sds_port *sci_port,
                                  struct scic_sds_phy *sci_phy)
@@ -140,7 +126,7 @@ void isci_port_link_up(struct isci_host *isci_host,
        unsigned long flags;
        struct scic_port_properties properties;
        struct isci_phy *isci_phy = sci_phy_to_iphy(phy);
-       struct isci_port *isci_port = port->iport;
+       struct isci_port *isci_port = sci_port_to_iport(port);
        unsigned long success = true;
 
        BUG_ON(isci_phy->isci_port != NULL);
@@ -346,8 +332,7 @@ int isci_port_perform_hard_reset(struct isci_host *ihost, struct isci_port *ipor
        spin_lock_irqsave(&ihost->scic_lock, flags);
 
        #define ISCI_PORT_RESET_TIMEOUT SCIC_SDS_SIGNATURE_FIS_TIMEOUT
-       status = scic_port_hard_reset(iport->sci_port_handle,
-                                     ISCI_PORT_RESET_TIMEOUT);
+       status = scic_port_hard_reset(&iport->sci, ISCI_PORT_RESET_TIMEOUT);
 
        spin_unlock_irqrestore(&ihost->scic_lock, flags);
 

diff --git a/drivers/scsi/isci/port.h b/drivers/scsi/isci/port.h
index ac1ac86ead6f392ec74bc79b07be7f09204432ef..355034542e4c4f0ae352065c5e5f8d27a2f1e53a 100644 (file)
--- a/drivers/scsi/isci/port.h
+++ b/drivers/scsi/isci/port.h
@@ -53,19 +53,12 @@
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
-/**
- * This file contains the isci_port object definition.
- *
- * port.h
- */
-
-#if !defined(_ISCI_PORT_H_)
+#ifndef _ISCI_PORT_H_
 #define _ISCI_PORT_H_
+#include "scic_sds_port.h"
 
 struct isci_phy;
 struct isci_host;
-struct scic_sds_phy;
-
 
 enum isci_status {
        isci_freed        = 0x00,
@@ -84,9 +77,6 @@ enum isci_status {
  *
  */
 struct isci_port {
-
-       struct scic_sds_port *sci_port_handle;
-
        enum isci_status status;
        struct isci_host *isci_host;
        struct asd_sas_port sas_port;
@@ -96,16 +86,19 @@ struct isci_port {
        struct completion start_complete;
        struct completion hard_reset_complete;
        enum sci_status hard_reset_status;
+       struct scic_sds_port sci;
 };
 
-#define to_isci_port(p)        \
-       container_of(p, struct isci_port, sas_port);
+static inline struct isci_port *sci_port_to_iport(struct scic_sds_port *sci_port)
+{
+       struct isci_port *iport = container_of(sci_port, typeof(*iport), sci);
+
+       return iport;
+}
 
 enum isci_status isci_port_get_state(
        struct isci_port *isci_port);
 
-
-
 void isci_port_formed(
        struct asd_sas_phy *);
 

diff --git a/drivers/scsi/isci/remote_device.c b/drivers/scsi/isci/remote_device.c
index 734d028448b0865c01cf2b16a79c6c071a6f964b..a441c23b6859cf30e0725273cc1ea1b9609cf8b8 100644 (file)
--- a/drivers/scsi/isci/remote_device.c
+++ b/drivers/scsi/isci/remote_device.c
@@ -1264,7 +1264,7 @@ static enum sci_status scic_remote_device_start(struct scic_sds_remote_device *s
 static enum sci_status isci_remote_device_construct(struct isci_port *iport,
                                                    struct isci_remote_device *idev)
 {
-       struct scic_sds_port *sci_port = iport->sci_port_handle;
+       struct scic_sds_port *sci_port = &iport->sci;
        struct isci_host *ihost = iport->isci_host;
        struct domain_device *dev = idev->domain_dev;
        enum sci_status status;

diff --git a/drivers/scsi/isci/sci_environment.h b/drivers/scsi/isci/sci_environment.h
index bb07ed31b51c42f54ab6096cfa204ca050fd2a15..1806969fc435367b2a75e85b7cb4d3c0e60ec08b 100644 (file)
--- a/drivers/scsi/isci/sci_environment.h
+++ b/drivers/scsi/isci/sci_environment.h
@@ -77,7 +77,7 @@ static inline struct device *sciphy_to_dev(struct scic_sds_phy *sci_phy)
 
 static inline struct device *sciport_to_dev(struct scic_sds_port *sci_port)
 {
-       struct isci_port *iport = sci_port->iport;
+       struct isci_port *iport = sci_port_to_iport(sci_port);
 
        if (!iport || !iport->isci_host)
                return NULL;