[PATCH] powerpc: remove iSeries_Global_Device_List

We can now scan the list of device nodes instead.  This also allows us
to remove the Device_list member of struct pci_dn.
Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Paul Mackerras <paulus@samba.org>

arch/powerpc/platforms/iseries/iommu.c

@@ -32,13 +32,11 @@
 #include <asm/tce.h>
 #include <asm/machdep.h>
 #include <asm/abs_addr.h>
+#include <asm/prom.h>
 #include <asm/pci-bridge.h>
 #include <asm/iseries/hv_call_xm.h>
 #include <asm/iseries/iommu.h>
 
-extern struct list_head iSeries_Global_Device_List;
-
-
 static void tce_build_iSeries(struct iommu_table *tbl, long index, long npages,
 		unsigned long uaddr, enum dma_data_direction direction)
 {
@@ -140,10 +138,15 @@ void iommu_table_getparms_iSeries(unsigned long busno,
  */
 static struct iommu_table *iommu_table_find(struct iommu_table * tbl)
 {
-	struct pci_dn *pdn;
+	struct device_node *node;
+
+	for (node = NULL; (node = of_find_all_nodes(node)); ) {
+		struct pci_dn *pdn = PCI_DN(node);
+		struct iommu_table *it;
 
-	list_for_each_entry(pdn, &iSeries_Global_Device_List, Device_List) {
-		struct iommu_table *it = pdn->iommu_table;
+		if (pdn == NULL)
+			continue;
+		it = pdn->iommu_table;
 		if ((it != NULL) &&
 		    (it->it_type == TCE_PCI) &&
 		    (it->it_offset == tbl->it_offset) &&

arch/powerpc/platforms/iseries/pci.c

@@ -50,8 +50,6 @@
  */
 static struct device_node *find_Device_Node(int bus, int devfn);
 
-LIST_HEAD(iSeries_Global_Device_List);
-
 static int Pci_Retry_Max = 3;	/* Only retry 3 times  */
 static int Pci_Error_Flag = 1;	/* Set Retry Error on. */
 
@@ -245,8 +243,6 @@ void iSeries_pcibios_init(void)
 			pdn->bussubno = *busp;
 			pdn->Irq = irq;
 			pdn->LogicalSlot = *lsn;
-			list_add_tail(&pdn->Device_List,
-					&iSeries_Global_Device_List);
 		}
 	}
 }
@@ -338,11 +334,13 @@ EXPORT_SYMBOL(iSeries_memcpy_fromio);
  */
 static struct device_node *find_Device_Node(int bus, int devfn)
 {
-	struct pci_dn *pdn;
+	struct device_node *node;
 
-	list_for_each_entry(pdn, &iSeries_Global_Device_List, Device_List) {
-		if ((bus == pdn->busno) && (devfn == pdn->devfn))
-			return pdn->node;
+	for (node = NULL; (node = of_find_all_nodes(node)); ) {
+		struct pci_dn *pdn = PCI_DN(node);
+
+		if (pdn && (bus == pdn->busno) && (devfn == pdn->devfn))
+			return node;
 	}
 	return NULL;
 }

include/asm-powerpc/pci-bridge.h

@@ -79,7 +79,6 @@ struct pci_dn {
 	struct	pci_dev *pcidev;	/* back-pointer to the pci device */
 	struct	device_node *node;	/* back-pointer to the device_node */
 #ifdef CONFIG_PPC_ISERIES
-	struct	list_head Device_List;
 	int	Irq;			/* Assigned IRQ */
 	int	Flags;			/* Possible flags(disable/bist)*/
 	u8	LogicalSlot;		/* Hv Slot Index for Tces */