[PATCH] Separate pci bits out of struct device_node

This patch pulls the PCI-related junk out of struct device_node and
puts it in a separate structure, struct pci_dn.  The device_node now
just has a void * pointer in it, which points to a struct pci_dn for
nodes that represent PCI devices.  It could potentially be used in
future for device-specific data for other sorts of devices, such as
virtual I/O devices.

Signed-off-by: Paul Mackerras <paulus@samba.org>

2 files changed, 17 insertions, 11 deletions

diff --git a/drivers/pci/hotplug/rpadlpar_core.c b/drivers/pci/hotplug/rpadlpar_core.c
index 4ada15111af0..ad1017da8656 100644
--- a/drivers/pci/hotplug/rpadlpar_core.c
+++ b/drivers/pci/hotplug/rpadlpar_core.c
@@ -134,7 +134,8 @@ static void rpadlpar_claim_one_bus(struct pci_bus *b)
 static int pci_add_secondary_bus(struct device_node *dn,
                 struct pci_dev *bridge_dev)
 {
-        struct pci_controller *hose = dn->phb;
+        struct pci_dn *pdn = dn->data;
+        struct pci_controller *hose = pdn->phb;
         struct pci_bus *child;
         u8 sec_busno;
 
@@ -159,7 +160,7 @@ static int pci_add_secondary_bus(struct device_node *dn,
         if (hose->last_busno < child->number)
                 hose->last_busno = child->number;
 
-        dn->bussubno = child->number;
+        pdn->bussubno = child->number;
 
         /* ioremap() for child bus, which may or may not succeed */
         remap_bus_range(child);
@@ -183,11 +184,12 @@ static struct pci_dev *dlpar_find_new_dev(struct pci_bus *parent,
 
 static struct pci_dev *dlpar_pci_add_bus(struct device_node *dn)
 {
-        struct pci_controller *hose = dn->phb;
+        struct pci_dn *pdn = dn->data;
+        struct pci_controller *hose = pdn->phb;
         struct pci_dev *dev = NULL;
 
         /* Scan phb bus for EADS device, adding new one to bus->devices */
-        if (!pci_scan_single_device(hose->bus, dn->devfn)) {
+        if (!pci_scan_single_device(hose->bus, pdn->devfn)) {
                 printk(KERN_ERR "%s: found no device on bus\n", __FUNCTION__);
                 return NULL;
         }
@@ -269,6 +271,7 @@ static int dlpar_remove_root_bus(struct pci_controller *phb)
 static int dlpar_remove_phb(char *drc_name, struct device_node *dn)
 {
         struct slot *slot;
+        struct pci_dn *pdn;
         int rc = 0;
 
         if (!rpaphp_find_pci_bus(dn))
@@ -285,12 +288,13 @@ static int dlpar_remove_phb(char *drc_name, struct device_node *dn)
                 }
         }
 
-        BUG_ON(!dn->phb);
-        rc = dlpar_remove_root_bus(dn->phb);
+        pdn = dn->data;
+        BUG_ON(!pdn || !pdn->phb);
+        rc = dlpar_remove_root_bus(pdn->phb);
         if (rc < 0)
                 return rc;
 
-        dn->phb = NULL;
+        pdn->phb = NULL;
 
         return 0;
 }
@@ -299,7 +303,7 @@ static int dlpar_add_phb(char *drc_name, struct device_node *dn)
 {
         struct pci_controller *phb;
 
-        if (dn->phb) {
+        if (PCI_DN(dn)->phb) {
                 /* PHB already exists */
                 return -EINVAL;
         }
diff --git a/drivers/pci/hotplug/rpaphp_pci.c b/drivers/pci/hotplug/rpaphp_pci.c
index 17a0279ebcb9..49e4d10a6488 100644
--- a/drivers/pci/hotplug/rpaphp_pci.c
+++ b/drivers/pci/hotplug/rpaphp_pci.c
@@ -51,10 +51,12 @@ static struct pci_bus *find_bus_among_children(struct pci_bus *bus,
 
 struct pci_bus *rpaphp_find_pci_bus(struct device_node *dn)
 {
-        if (!dn->phb || !dn->phb->bus)
+        struct pci_dn *pdn = dn->data;
+
+        if (!pdn  || !pdn->phb || !pdn->phb->bus)
                 return NULL;
 
-        return find_bus_among_children(dn->phb->bus, dn);
+        return find_bus_among_children(pdn->phb->bus, dn);
 }
 EXPORT_SYMBOL_GPL(rpaphp_find_pci_bus);
 
@@ -229,7 +231,7 @@ rpaphp_pci_config_slot(struct pci_bus *bus)
         if (!dn || !dn->child)
                 return NULL;
 
-        slotno = PCI_SLOT(dn->child->devfn);
+        slotno = PCI_SLOT(PCI_DN(dn->child)->devfn);
 
         /* pci_scan_slot should find all children */
         num = pci_scan_slot(bus, PCI_DEVFN(slotno, 0));