shpchp: remove unnecessary struct php_ctlr

The struct php_ctlr seems to be only for complicating codes. This
patch removes struct php_ctlr and related codes.

Signed-off-by: Kenji Kaneshige <kaneshige.kenji@jp.fujitsu.com>
Signed-off-by: Kristen Carlson Accardi <kristen.c.accardi@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

4 files changed, 73 insertions, 249 deletions

diff --git a/drivers/pci/hotplug/shpchp.h b/drivers/pci/hotplug/shpchp.h
index 50757695844f..f036485cd9ec 100644
--- a/drivers/pci/hotplug/shpchp.h
+++ b/drivers/pci/hotplug/shpchp.h
@@ -83,7 +83,6 @@ struct event_info {
 struct controller {
         struct mutex crit_sect;         /* critical section mutex */
         struct mutex cmd_lock;          /* command lock */
-        struct php_ctlr_state_s *hpc_ctlr_handle; /* HPC controller handle */
         int num_slots;                  /* Number of slots on ctlr */
         int slot_num_inc;               /* 1 or -1 */
         struct pci_dev *pci_dev;
@@ -102,6 +101,8 @@ struct controller {
         u32 cap_offset;
         unsigned long mmio_base;
         unsigned long mmio_size;
+        void __iomem *creg;
+        struct timer_list poll_timer;
 };
 
 
@@ -176,10 +177,10 @@ extern int __must_check shpchp_create_ctrl_files(struct controller *ctrl);
 extern int      shpchp_sysfs_enable_slot(struct slot *slot);
 extern int      shpchp_sysfs_disable_slot(struct slot *slot);
 
-extern u8       shpchp_handle_attention_button(u8 hp_slot, void *inst_id);
-extern u8       shpchp_handle_switch_change(u8 hp_slot, void *inst_id);
-extern u8       shpchp_handle_presence_change(u8 hp_slot, void *inst_id);
-extern u8       shpchp_handle_power_fault(u8 hp_slot, void *inst_id);
+extern u8 shpchp_handle_attention_button(u8 hp_slot, struct controller *ctrl);
+extern u8 shpchp_handle_switch_change(u8 hp_slot, struct controller *ctrl);
+extern u8 shpchp_handle_presence_change(u8 hp_slot, struct controller *ctrl);
+extern u8 shpchp_handle_power_fault(u8 hp_slot, struct controller *ctrl);
 
 /* pci functions */
 extern int      shpchp_save_config(struct controller *ctrl, int busnumber, int num_ctlr_slots, int first_device_num);
@@ -262,24 +263,6 @@ enum ctrl_offsets {
         SLOT11 =        offsetof(struct ctrl_reg, slot11),
         SLOT12 =        offsetof(struct ctrl_reg, slot12),
 };
-typedef u8(*php_intr_callback_t) (u8 hp_slot, void *instance_id);
-struct php_ctlr_state_s {
-        struct php_ctlr_state_s *pnext;
-        struct pci_dev *pci_dev;
-        unsigned int irq;
-        unsigned long flags;    /* spinlock's */
-        u32 slot_device_offset;
-        u32 num_slots;
-        struct timer_list       int_poll_timer; /* Added for poll event */
-        php_intr_callback_t attention_button_callback;
-        php_intr_callback_t switch_change_callback;
-        php_intr_callback_t presence_change_callback;
-        php_intr_callback_t power_fault_callback;
-        void *callback_instance_id;
-        void __iomem *creg;                     /* Ptr to controller register space */
-};
-/* Inline functions */
-
 
 /* Inline functions to check the sanity of a pointer that is passed to us */
 static inline int slot_paranoia_check (struct slot *slot, const char *function)
@@ -400,21 +383,8 @@ static inline void amd_pogo_errata_restore_misc_reg(struct slot *p_slot)
         pci_write_config_dword(p_slot->ctrl->pci_dev, PCIX_MISCII_OFFSET, pcix_misc2_temp);
 }
 
-enum php_ctlr_type {
-        PCI,
-        ISA,
-        ACPI
-};
-
 int shpc_init( struct controller *ctrl, struct pci_dev *pdev);
 
-int shpc_get_ctlr_slot_config( struct controller *ctrl,
-                int *num_ctlr_slots,
-                int *first_device_num,
-                int *physical_slot_num,
-                int *updown,
-                int *flags);
-
 struct hpc_ops {
         int     (*power_on_slot )               (struct slot *slot);
         int     (*slot_enable )                 (struct slot *slot);
diff --git a/drivers/pci/hotplug/shpchp_core.c b/drivers/pci/hotplug/shpchp_core.c
index 4eac85b3d90e..68471dd49f7e 100644
--- a/drivers/pci/hotplug/shpchp_core.c
+++ b/drivers/pci/hotplug/shpchp_core.c
@@ -211,36 +211,6 @@ void cleanup_slots(struct controller *ctrl)
         }
 }
 
-static int get_ctlr_slot_config(struct controller *ctrl)
-{
-        int num_ctlr_slots;
-        int first_device_num;
-        int physical_slot_num;
-        int updown;
-        int rc;
-        int flags;
-
-        rc = shpc_get_ctlr_slot_config(ctrl, &num_ctlr_slots,
-                                       &first_device_num, &physical_slot_num,
-                                       &updown, &flags);
-        if (rc) {
-                err("%s: get_ctlr_slot_config fail for b:d (%x:%x)\n",
-                    __FUNCTION__, ctrl->bus, ctrl->device);
-                return -1;
-        }
-
-        ctrl->num_slots = num_ctlr_slots;
-        ctrl->slot_device_offset = first_device_num;
-        ctrl->first_slot = physical_slot_num;
-        ctrl->slot_num_inc = updown;            /* either -1 or 1 */
-
-        dbg("%s: num_slot(0x%x) 1st_dev(0x%x) psn(0x%x) updown(%d) for b:d "
-            "(%x:%x)\n", __FUNCTION__, num_ctlr_slots, first_device_num,
-            physical_slot_num, updown, ctrl->bus, ctrl->device);
-
-        return 0;
-}
-
 /*
  * set_attention_status - Turns the Amber LED for a slot on, off or blink
  */
@@ -386,8 +356,6 @@ static int shpc_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
         int rc;
         struct controller *ctrl;
         struct slot *t_slot;
-        int first_device_num;   /* first PCI device number */
-        int num_ctlr_slots;     /* number of slots implemented */
 
         if (!is_shpc_capable(pdev))
                 return -ENODEV;
@@ -416,17 +384,6 @@ static int shpc_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
         dbg("ctrl bus=0x%x, device=%x, function=%x, irq=%x\n",
             ctrl->bus, ctrl->device, ctrl->function, pdev->irq);
 
-        /*
-         * Save configuration headers for this and subordinate PCI buses
-         */
-        rc = get_ctlr_slot_config(ctrl);
-        if (rc) {
-                err(msg_initialization_err, rc);
-                goto err_out_release_ctlr;
-        }
-        first_device_num = ctrl->slot_device_offset;
-        num_ctlr_slots = ctrl->num_slots;
-
         ctrl->add_support = 1;
 
         /* Setup the slot information structures */
@@ -437,7 +394,7 @@ static int shpc_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
         }
 
         /* Now hpc_functions (slot->hpc_ops->functions) are ready  */
-        t_slot = shpchp_find_slot(ctrl, first_device_num);
+        t_slot = shpchp_find_slot(ctrl, ctrl->slot_device_offset);
 
         /* Check for operation bus speed */
         rc = t_slot->hpc_ops->get_cur_bus_speed(t_slot, &ctrl->speed);
diff --git a/drivers/pci/hotplug/shpchp_ctrl.c b/drivers/pci/hotplug/shpchp_ctrl.c
index 158ac7836096..39893c77d008 100644
--- a/drivers/pci/hotplug/shpchp_ctrl.c
+++ b/drivers/pci/hotplug/shpchp_ctrl.c
@@ -57,9 +57,8 @@ static int queue_interrupt_event(struct slot *p_slot, u32 event_type)
         return 0;
 }
 
-u8 shpchp_handle_attention_button(u8 hp_slot, void *inst_id)
+u8 shpchp_handle_attention_button(u8 hp_slot, struct controller *ctrl)
 {
-        struct controller *ctrl = (struct controller *) inst_id;
         struct slot *p_slot;
         u32 event_type;
 
@@ -81,9 +80,8 @@ u8 shpchp_handle_attention_button(u8 hp_slot, void *inst_id)
 
 }
 
-u8 shpchp_handle_switch_change(u8 hp_slot, void *inst_id)
+u8 shpchp_handle_switch_change(u8 hp_slot, struct controller *ctrl)
 {
-        struct controller *ctrl = (struct controller *) inst_id;
         struct slot *p_slot;
         u8 getstatus;
         u32 event_type;
@@ -120,9 +118,8 @@ u8 shpchp_handle_switch_change(u8 hp_slot, void *inst_id)
         return 1;
 }
 
-u8 shpchp_handle_presence_change(u8 hp_slot, void *inst_id)
+u8 shpchp_handle_presence_change(u8 hp_slot, struct controller *ctrl)
 {
-        struct controller *ctrl = (struct controller *) inst_id;
         struct slot *p_slot;
         u32 event_type;
 
@@ -154,9 +151,8 @@ u8 shpchp_handle_presence_change(u8 hp_slot, void *inst_id)
         return 1;
 }
 
-u8 shpchp_handle_power_fault(u8 hp_slot, void *inst_id)
+u8 shpchp_handle_power_fault(u8 hp_slot, struct controller *ctrl)
 {
-        struct controller *ctrl = (struct controller *) inst_id;
         struct slot *p_slot;
         u32 event_type;
 
diff --git a/drivers/pci/hotplug/shpchp_hpc.c b/drivers/pci/hotplug/shpchp_hpc.c
index 83a5226ba9ed..b7bede4b7c27 100644
--- a/drivers/pci/hotplug/shpchp_hpc.c
+++ b/drivers/pci/hotplug/shpchp_hpc.c
@@ -212,44 +212,40 @@
 #define SLOT_SERR_INT_MASK      0x3
 
 DEFINE_DBG_BUFFER               /* Debug string buffer for entire HPC defined here */
-static struct php_ctlr_state_s *php_ctlr_list_head;     /* HPC state linked list */
-static int ctlr_seq_num = 0;    /* Controller sequenc # */
-static spinlock_t list_lock;
-
 static atomic_t shpchp_num_controllers = ATOMIC_INIT(0);
 
 static irqreturn_t shpc_isr(int irq, void *dev_id);
-static void start_int_poll_timer(struct php_ctlr_state_s *php_ctlr, int sec);
+static void start_int_poll_timer(struct controller *ctrl, int sec);
 static int hpc_check_cmd_status(struct controller *ctrl);
 
 static inline u8 shpc_readb(struct controller *ctrl, int reg)
 {
-        return readb(ctrl->hpc_ctlr_handle->creg + reg);
+        return readb(ctrl->creg + reg);
 }
 
 static inline void shpc_writeb(struct controller *ctrl, int reg, u8 val)
 {
-        writeb(val, ctrl->hpc_ctlr_handle->creg + reg);
+        writeb(val, ctrl->creg + reg);
 }
 
 static inline u16 shpc_readw(struct controller *ctrl, int reg)
 {
-        return readw(ctrl->hpc_ctlr_handle->creg + reg);
+        return readw(ctrl->creg + reg);
 }
 
 static inline void shpc_writew(struct controller *ctrl, int reg, u16 val)
 {
-        writew(val, ctrl->hpc_ctlr_handle->creg + reg);
+        writew(val, ctrl->creg + reg);
 }
 
 static inline u32 shpc_readl(struct controller *ctrl, int reg)
 {
-        return readl(ctrl->hpc_ctlr_handle->creg + reg);
+        return readl(ctrl->creg + reg);
 }
 
 static inline void shpc_writel(struct controller *ctrl, int reg, u32 val)
 {
-        writel(val, ctrl->hpc_ctlr_handle->creg + reg);
+        writel(val, ctrl->creg + reg);
 }
 
 static inline int shpc_indirect_read(struct controller *ctrl, int index,
@@ -268,21 +264,20 @@ static inline int shpc_indirect_read(struct controller *ctrl, int index,
 /*
  * This is the interrupt polling timeout function.
  */
-static void int_poll_timeout(unsigned long lphp_ctlr)
+static void int_poll_timeout(unsigned long data)
 {
-        struct php_ctlr_state_s *php_ctlr =
-                (struct php_ctlr_state_s *)lphp_ctlr;
+        struct controller *ctrl = (struct controller *)data;
 
         DBG_ENTER_ROUTINE
 
         /* Poll for interrupt events.  regs == NULL => polling */
-        shpc_isr(0, php_ctlr->callback_instance_id);
+        shpc_isr(0, ctrl);
 
-        init_timer(&php_ctlr->int_poll_timer);
+        init_timer(&ctrl->poll_timer);
         if (!shpchp_poll_time)
                 shpchp_poll_time = 2; /* default polling interval is 2 sec */
 
-        start_int_poll_timer(php_ctlr, shpchp_poll_time);
+        start_int_poll_timer(ctrl, shpchp_poll_time);
 
         DBG_LEAVE_ROUTINE
 }
@@ -290,16 +285,16 @@ static void int_poll_timeout(unsigned long lphp_ctlr)
 /*
  * This function starts the interrupt polling timer.
  */
-static void start_int_poll_timer(struct php_ctlr_state_s *php_ctlr, int sec)
+static void start_int_poll_timer(struct controller *ctrl, int sec)
 {
         /* Clamp to sane value */
         if ((sec <= 0) || (sec > 60))
                 sec = 2;
 
-        php_ctlr->int_poll_timer.function = &int_poll_timeout;
-        php_ctlr->int_poll_timer.data = (unsigned long)php_ctlr;
-        php_ctlr->int_poll_timer.expires = jiffies + sec * HZ;
-        add_timer(&php_ctlr->int_poll_timer);
+        ctrl->poll_timer.function = &int_poll_timeout;
+        ctrl->poll_timer.data = (unsigned long)ctrl;
+        ctrl->poll_timer.expires = jiffies + sec * HZ;
+        add_timer(&ctrl->poll_timer);
 }
 
 static inline int is_ctrl_busy(struct controller *ctrl)
@@ -666,33 +661,8 @@ static void hpc_set_green_led_blink(struct slot *slot)
         shpc_write_cmd(slot, slot->hp_slot, SET_PWR_BLINK);
 }
 
-int shpc_get_ctlr_slot_config(struct controller *ctrl,
-        int *num_ctlr_slots,    /* number of slots in this HPC                  */
-        int *first_device_num,  /* PCI dev num of the first slot in this SHPC   */
-        int *physical_slot_num, /* phy slot num of the first slot in this SHPC  */
-        int *updown,            /* physical_slot_num increament: 1 or -1        */
-        int *flags)
-{
-        u32 slot_config;
-
-        DBG_ENTER_ROUTINE 
-
-        slot_config = shpc_readl(ctrl, SLOT_CONFIG);
-        *first_device_num = (slot_config & FIRST_DEV_NUM) >> 8;
-        *num_ctlr_slots = slot_config & SLOT_NUM;
-        *physical_slot_num = (slot_config & PSN) >> 16;
-        *updown = ((slot_config & UPDOWN) >> 29) ? 1 : -1;
-
-        dbg("%s: physical_slot_num = %x\n", __FUNCTION__, *physical_slot_num);
-
-        DBG_LEAVE_ROUTINE 
-        return 0;
-}
-
 static void hpc_release_ctlr(struct controller *ctrl)
 {
-        struct php_ctlr_state_s *php_ctlr = ctrl->hpc_ctlr_handle;
-        struct php_ctlr_state_s *p, *p_prev;
         int i;
         u32 slot_reg, serr_int;
 
@@ -722,40 +692,15 @@ static void hpc_release_ctlr(struct controller *ctrl)
         serr_int &= ~SERR_INTR_RSVDZ_MASK;
         shpc_writel(ctrl, SERR_INTR_ENABLE, serr_int);
 
-        if (shpchp_poll_mode) {
-            del_timer(&php_ctlr->int_poll_timer);
-        } else {        
-                if (php_ctlr->irq) {
-                        free_irq(php_ctlr->irq, ctrl);
-                        php_ctlr->irq = 0;
-                        pci_disable_msi(php_ctlr->pci_dev);
-                }
-        }
-
-        if (php_ctlr->pci_dev) {
-                iounmap(php_ctlr->creg);
-                release_mem_region(ctrl->mmio_base, ctrl->mmio_size);
-                php_ctlr->pci_dev = NULL;
-        }
-
-        spin_lock(&list_lock);
-        p = php_ctlr_list_head;
-        p_prev = NULL;
-        while (p) {
-                if (p == php_ctlr) {
-                        if (p_prev)
-                                p_prev->pnext = p->pnext;
-                        else
-                                php_ctlr_list_head = p->pnext;
-                        break;
-                } else {
-                        p_prev = p;
-                        p = p->pnext;
-                }
+        if (shpchp_poll_mode)
+                del_timer(&ctrl->poll_timer);
+        else {
+                free_irq(ctrl->pci_dev->irq, ctrl);
+                pci_disable_msi(ctrl->pci_dev);
         }
-        spin_unlock(&list_lock);
 
-        kfree(php_ctlr);
+        iounmap(ctrl->creg);
+        release_mem_region(ctrl->mmio_base, ctrl->mmio_size);
 
         /*
          * If this is the last controller to be released, destroy the
@@ -764,8 +709,7 @@ static void hpc_release_ctlr(struct controller *ctrl)
         if (atomic_dec_and_test(&shpchp_num_controllers))
                 destroy_workqueue(shpchp_wq);
 
-DBG_LEAVE_ROUTINE
-                          
+        DBG_LEAVE_ROUTINE
 }
 
 static int hpc_power_on_slot(struct slot * slot)
@@ -891,7 +835,6 @@ static int hpc_set_bus_speed_mode(struct slot * slot, enum pci_bus_speed value)
 static irqreturn_t shpc_isr(int irq, void *dev_id)
 {
         struct controller *ctrl = (struct controller *)dev_id;
-        struct php_ctlr_state_s *php_ctlr = ctrl->hpc_ctlr_handle;
         u32 serr_int, slot_reg, intr_loc, intr_loc2;
         int hp_slot;
 
@@ -942,20 +885,16 @@ static irqreturn_t shpc_isr(int irq, void *dev_id)
                     __FUNCTION__, hp_slot, slot_reg);
 
                 if (slot_reg & MRL_CHANGE_DETECTED)
-                        php_ctlr->switch_change_callback(
-                                hp_slot, php_ctlr->callback_instance_id);
+                        shpchp_handle_switch_change(hp_slot, ctrl);
 
                 if (slot_reg & BUTTON_PRESS_DETECTED)
-                        php_ctlr->attention_button_callback(
-                                hp_slot, php_ctlr->callback_instance_id);
+                        shpchp_handle_attention_button(hp_slot, ctrl);
 
                 if (slot_reg & PRSNT_CHANGE_DETECTED)
-                        php_ctlr->presence_change_callback(
-                                hp_slot , php_ctlr->callback_instance_id);
+                        shpchp_handle_presence_change(hp_slot, ctrl);
 
                 if (slot_reg & (ISO_PFAULT_DETECTED | CON_PFAULT_DETECTED))
-                        php_ctlr->power_fault_callback(
-                                hp_slot, php_ctlr->callback_instance_id);
+                        shpchp_handle_power_fault(hp_slot, ctrl);
 
                 /* Clear all slot events */
                 slot_reg &= ~SLOT_REG_RSVDZ_MASK;
@@ -1114,10 +1053,8 @@ static struct hpc_ops shpchp_hpc_ops = {
         .release_ctlr                   = hpc_release_ctlr,
 };
 
-int shpc_init(struct controller * ctrl, struct pci_dev * pdev)
+int shpc_init(struct controller *ctrl, struct pci_dev *pdev)
 {
-        struct php_ctlr_state_s *php_ctlr, *p;
-        void *instance_id = ctrl;
         int rc = -1, num_slots = 0;
         u8 hp_slot;
         u32 shpc_base_offset;
@@ -1128,16 +1065,6 @@ int shpc_init(struct controller * ctrl, struct pci_dev * pdev)
 
         ctrl->pci_dev = pdev;  /* pci_dev of the P2P bridge */
 
-        spin_lock_init(&list_lock);
-        php_ctlr = kzalloc(sizeof(*php_ctlr), GFP_KERNEL);
-
-        if (!php_ctlr) {        /* allocate controller state data */
-                err("%s: HPC controller memory allocation error!\n", __FUNCTION__);
-                goto abort;
-        }
-
-        php_ctlr->pci_dev = pdev;       /* save pci_dev in context */
-
         if ((pdev->vendor == PCI_VENDOR_ID_AMD) || (pdev->device ==
                                 PCI_DEVICE_ID_AMD_GOLAM_7450)) {
                 /* amd shpc driver doesn't use Base Offset; assume 0 */
@@ -1147,20 +1074,20 @@ int shpc_init(struct controller * ctrl, struct pci_dev * pdev)
                 ctrl->cap_offset = pci_find_capability(pdev, PCI_CAP_ID_SHPC);
                 if (!ctrl->cap_offset) {
                         err("%s : cap_offset == 0\n", __FUNCTION__);
-                        goto abort_free_ctlr;
+                        goto abort;
                 }
                 dbg("%s: cap_offset = %x\n", __FUNCTION__, ctrl->cap_offset);
 
                 rc = shpc_indirect_read(ctrl, 0, &shpc_base_offset);
                 if (rc) {
                         err("%s: cannot read base_offset\n", __FUNCTION__);
-                        goto abort_free_ctlr;
+                        goto abort;
                 }
 
                 rc = shpc_indirect_read(ctrl, 3, &tempdword);
                 if (rc) {
                         err("%s: cannot read slot config\n", __FUNCTION__);
-                        goto abort_free_ctlr;
+                        goto abort;
                 }
                 num_slots = tempdword & SLOT_NUM;
                 dbg("%s: num_slots (indirect) %x\n", __FUNCTION__, num_slots);
@@ -1170,7 +1097,7 @@ int shpc_init(struct controller * ctrl, struct pci_dev * pdev)
                         if (rc) {
                                 err("%s: cannot read creg (index = %d)\n",
                                     __FUNCTION__, i);
-                                goto abort_free_ctlr;
+                                goto abort;
                         }
                         dbg("%s: offset %d: value %x\n", __FUNCTION__,i,
                                         tempdword);
@@ -1187,24 +1114,24 @@ int shpc_init(struct controller * ctrl, struct pci_dev * pdev)
         rc = pci_enable_device(pdev);
         if (rc) {
                 err("%s: pci_enable_device failed\n", __FUNCTION__);
-                goto abort_free_ctlr;
+                goto abort;
         }
 
         if (!request_mem_region(ctrl->mmio_base, ctrl->mmio_size, MY_NAME)) {
                 err("%s: cannot reserve MMIO region\n", __FUNCTION__);
                 rc = -1;
-                goto abort_free_ctlr;
+                goto abort;
         }
 
-        php_ctlr->creg = ioremap(ctrl->mmio_base, ctrl->mmio_size);
-        if (!php_ctlr->creg) {
+        ctrl->creg = ioremap(ctrl->mmio_base, ctrl->mmio_size);
+        if (!ctrl->creg) {
                 err("%s: cannot remap MMIO region %lx @ %lx\n", __FUNCTION__,
                     ctrl->mmio_size, ctrl->mmio_base);
                 release_mem_region(ctrl->mmio_base, ctrl->mmio_size);
                 rc = -1;
-                goto abort_free_ctlr;
+                goto abort;
         }
-        dbg("%s: php_ctlr->creg %p\n", __FUNCTION__, php_ctlr->creg);
+        dbg("%s: ctrl->creg %p\n", __FUNCTION__, ctrl->creg);
 
         mutex_init(&ctrl->crit_sect);
         mutex_init(&ctrl->cmd_lock);
@@ -1212,23 +1139,14 @@ int shpc_init(struct controller * ctrl, struct pci_dev * pdev)
         /* Setup wait queue */
         init_waitqueue_head(&ctrl->queue);
 
-        /* Find the IRQ */
-        php_ctlr->irq = pdev->irq;
-        php_ctlr->attention_button_callback = shpchp_handle_attention_button,
-        php_ctlr->switch_change_callback = shpchp_handle_switch_change;
-        php_ctlr->presence_change_callback = shpchp_handle_presence_change;
-        php_ctlr->power_fault_callback = shpchp_handle_power_fault;
-        php_ctlr->callback_instance_id = instance_id;
-
-        ctrl->hpc_ctlr_handle = php_ctlr;
         ctrl->hpc_ops = &shpchp_hpc_ops;
 
         /* Return PCI Controller Info */
         slot_config = shpc_readl(ctrl, SLOT_CONFIG);
-        php_ctlr->slot_device_offset = (slot_config & FIRST_DEV_NUM) >> 8;
-        php_ctlr->num_slots = slot_config & SLOT_NUM;
-        dbg("%s: slot_device_offset %x\n", __FUNCTION__, php_ctlr->slot_device_offset);
-        dbg("%s: num_slots %x\n", __FUNCTION__, php_ctlr->num_slots);
+        ctrl->slot_device_offset = (slot_config & FIRST_DEV_NUM) >> 8;
+        ctrl->num_slots = slot_config & SLOT_NUM;
+        ctrl->first_slot = (slot_config & PSN) >> 16;
+        ctrl->slot_num_inc = ((slot_config & UPDOWN) >> 29) ? 1 : -1;
 
         /* Mask Global Interrupt Mask & Command Complete Interrupt Mask */
         tempdword = shpc_readl(ctrl, SERR_INTR_ENABLE);
@@ -1243,7 +1161,7 @@ int shpc_init(struct controller * ctrl, struct pci_dev * pdev)
         /* Mask the MRL sensor SERR Mask of individual slot in
          * Slot SERR-INT Mask & clear all the existing event if any
          */
-        for (hp_slot = 0; hp_slot < php_ctlr->num_slots; hp_slot++) {
+        for (hp_slot = 0; hp_slot < ctrl->num_slots; hp_slot++) {
                 slot_reg = shpc_readl(ctrl, SLOT_REG(hp_slot));
                 dbg("%s: Default Logical Slot Register %d value %x\n", __FUNCTION__,
                         hp_slot, slot_reg);
@@ -1255,24 +1173,27 @@ int shpc_init(struct controller * ctrl, struct pci_dev * pdev)
                 shpc_writel(ctrl, SLOT_REG(hp_slot), slot_reg);
         }
         
-        if (shpchp_poll_mode)  {/* Install interrupt polling code */
-                /* Install and start the interrupt polling timer */
-                init_timer(&php_ctlr->int_poll_timer);
-                start_int_poll_timer( php_ctlr, 10 );   /* start with 10 second delay */
+        if (shpchp_poll_mode) {
+                /* Install interrupt polling timer. Start with 10 sec delay */
+                init_timer(&ctrl->poll_timer);
+                start_int_poll_timer(ctrl, 10);
         } else {
                 /* Installs the interrupt handler */
                 rc = pci_enable_msi(pdev);
                 if (rc) {
                         info("Can't get msi for the hotplug controller\n");
                         info("Use INTx for the hotplug controller\n");
-                } else
-                        php_ctlr->irq = pdev->irq;
+                }
                 
-                rc = request_irq(php_ctlr->irq, shpc_isr, IRQF_SHARED, MY_NAME, (void *) ctrl);
-                dbg("%s: request_irq %d for hpc%d (returns %d)\n", __FUNCTION__, php_ctlr->irq, ctlr_seq_num, rc);
+                rc = request_irq(ctrl->pci_dev->irq, shpc_isr, IRQF_SHARED,
+                                 MY_NAME, (void *)ctrl);
+                dbg("%s: request_irq %d for hpc%d (returns %d)\n",
+                    __FUNCTION__, ctrl->pci_dev->irq,
+                    atomic_read(&shpchp_num_controllers), rc);
                 if (rc) {
-                        err("Can't get irq %d for the hotplug controller\n", php_ctlr->irq);
-                        goto abort_free_ctlr;
+                        err("Can't get irq %d for the hotplug controller\n",
+                            ctrl->pci_dev->irq);
+                        goto abort_iounmap;
                 }
         }
         dbg("%s: HPC at b:d:f:irq=0x%x:%x:%x:%x\n", __FUNCTION__,
@@ -1280,24 +1201,6 @@ int shpc_init(struct controller * ctrl, struct pci_dev * pdev)
                         PCI_FUNC(pdev->devfn), pdev->irq);
         get_hp_hw_control_from_firmware(pdev);
 
-        /*  Add this HPC instance into the HPC list */
-        spin_lock(&list_lock);
-        if (php_ctlr_list_head == 0) {
-                php_ctlr_list_head = php_ctlr;
-                p = php_ctlr_list_head;
-                p->pnext = NULL;
-        } else {
-                p = php_ctlr_list_head;
-
-                while (p->pnext)
-                        p = p->pnext;
-
-                p->pnext = php_ctlr;
-        }
-        spin_unlock(&list_lock);
-
-        ctlr_seq_num++;
-
         /*
          * If this is the first controller to be initialized,
          * initialize the shpchpd work queue
@@ -1306,14 +1209,14 @@ int shpc_init(struct controller * ctrl, struct pci_dev * pdev)
                 shpchp_wq = create_singlethread_workqueue("shpchpd");
                 if (!shpchp_wq) {
                         rc = -ENOMEM;
-                        goto abort_free_ctlr;
+                        goto abort_iounmap;
                 }
         }
 
         /*
          * Unmask all event interrupts of all slots
          */
-        for (hp_slot = 0; hp_slot < php_ctlr->num_slots; hp_slot++) {
+        for (hp_slot = 0; hp_slot < ctrl->num_slots; hp_slot++) {
                 slot_reg = shpc_readl(ctrl, SLOT_REG(hp_slot));
                 dbg("%s: Default Logical Slot Register %d value %x\n", __FUNCTION__,
                         hp_slot, slot_reg);
@@ -1336,10 +1239,8 @@ int shpc_init(struct controller * ctrl, struct pci_dev * pdev)
         return 0;
 
         /* We end up here for the many possible ways to fail this API.  */
-abort_free_ctlr:
-        if (php_ctlr->creg)
-                iounmap(php_ctlr->creg);
-        kfree(php_ctlr);
+abort_iounmap:
+        iounmap(ctrl->creg);
 abort:
         DBG_LEAVE_ROUTINE
         return rc;