8 files changed, 53 insertions, 40 deletions

diff --git a/arch/powerpc/kernel/lparcfg.c b/arch/powerpc/kernel/lparcfg.c
index b8dc1eeb0169..fc1f7a949b2b 100644
--- a/arch/powerpc/kernel/lparcfg.c
+++ b/arch/powerpc/kernel/lparcfg.c
@@ -321,7 +321,7 @@ static int pseries_lparcfg_data(struct seq_file *m, void *v)
         struct device_node *rtas_node;
         const int *lrdrp = NULL;
 
-        rtas_node = find_path_device("/rtas");
+        rtas_node = of_find_node_by_path("/rtas");
         if (rtas_node)
                 lrdrp = of_get_property(rtas_node, "ibm,lrdr-capacity", NULL);
 
@@ -330,6 +330,7 @@ static int pseries_lparcfg_data(struct seq_file *m, void *v)
         } else {
                 partition_potential_processors = *(lrdrp + 4);
         }
+        of_node_put(rtas_node);
 
         partition_active_processors = lparcfg_count_active_processors();
 
@@ -537,7 +538,7 @@ static int lparcfg_data(struct seq_file *m, void *v)
 
         seq_printf(m, "%s %s \n", MODULE_NAME, MODULE_VERS);
 
-        rootdn = find_path_device("/");
+        rootdn = of_find_node_by_path("/");
         if (rootdn) {
                 tmp = of_get_property(rootdn, "model", NULL);
                 if (tmp) {
@@ -557,6 +558,7 @@ static int lparcfg_data(struct seq_file *m, void *v)
                                         NULL);
                 if (lp_index_ptr)
                         lp_index = *lp_index_ptr;
+                of_node_put(rootdn);
         }
         seq_printf(m, "serial_number=%s\n", system_id);
         seq_printf(m, "system_type=%s\n", model);
diff --git a/arch/powerpc/kernel/pci_32.c b/arch/powerpc/kernel/pci_32.c
index ae04f9418363..5b05a09a6bdf 100644
--- a/arch/powerpc/kernel/pci_32.c
+++ b/arch/powerpc/kernel/pci_32.c
@@ -669,6 +669,7 @@ pcibios_make_OF_bus_map(void)
         int i;
         struct pci_controller* hose;
         struct property *map_prop;
+        struct device_node *dn;
 
         pci_to_OF_bus_map = kmalloc(pci_bus_count, GFP_KERNEL);
         if (!pci_to_OF_bus_map) {
@@ -690,12 +691,13 @@ pcibios_make_OF_bus_map(void)
                         continue;
                 make_one_node_map(node, hose->first_busno);
         }
-        map_prop = of_find_property(find_path_device("/"),
-                        "pci-OF-bus-map", NULL);
+        dn = of_find_node_by_path("/");
+        map_prop = of_find_property(dn, "pci-OF-bus-map", NULL);
         if (map_prop) {
                 BUG_ON(pci_bus_count > map_prop->length);
                 memcpy(map_prop->value, pci_to_OF_bus_map, pci_bus_count);
         }
+        of_node_put(dn);
 #ifdef DEBUG
         printk("PCI->OF bus map:\n");
         for (i=0; i<pci_bus_count; i++) {
@@ -1006,14 +1008,19 @@ void __init
 pci_create_OF_bus_map(void)
 {
         struct property* of_prop;
-        
+        struct device_node *dn;
+
         of_prop = (struct property*) alloc_bootmem(sizeof(struct property) + 256);
-        if (of_prop && find_path_device("/")) {
+        if (!of_prop)
+                return;
+        dn = of_find_node_by_path("/");
+        if (dn) {
                 memset(of_prop, -1, sizeof(struct property) + 256);
                 of_prop->name = "pci-OF-bus-map";
                 of_prop->length = 256;
                 of_prop->value = &of_prop[1];
-                prom_add_property(find_path_device("/"), of_prop);
+                prom_add_property(dn, of_prop);
+                of_node_put(dn);
         }
 }
 
diff --git a/arch/powerpc/kernel/prom.c b/arch/powerpc/kernel/prom.c
index 911ec77a42d2..17c41fefecf2 100644
--- a/arch/powerpc/kernel/prom.c
+++ b/arch/powerpc/kernel/prom.c
@@ -1153,20 +1153,6 @@ int machine_is_compatible(const char *compat)
 }
 EXPORT_SYMBOL(machine_is_compatible);
 
-/**
- * Find the device_node with a given full_name.
- */
-struct device_node *find_path_device(const char *path)
-{
-        struct device_node *np;
-
-        for (np = allnodes; np != 0; np = np->allnext)
-                if (np->full_name != 0 && strcasecmp(np->full_name, path) == 0)
-                        return np;
-        return NULL;
-}
-EXPORT_SYMBOL(find_path_device);
-
 /*******
  *
  * New implementation of the OF "find" APIs, return a refcounted
diff --git a/arch/powerpc/kernel/rtas.c b/arch/powerpc/kernel/rtas.c
index 702fecc93204..214780798289 100644
--- a/arch/powerpc/kernel/rtas.c
+++ b/arch/powerpc/kernel/rtas.c
@@ -192,7 +192,7 @@ void rtas_progress(char *s, unsigned short hex)
 
         if (display_width == 0) {
                 display_width = 0x10;
-                if ((root = find_path_device("/rtas"))) {
+                if ((root = of_find_node_by_path("/rtas"))) {
                         if ((p = of_get_property(root,
                                         "ibm,display-line-length", NULL)))
                                 display_width = *p;
@@ -204,6 +204,7 @@ void rtas_progress(char *s, unsigned short hex)
                                 display_lines = *p;
                         row_width = of_get_property(root,
                                         "ibm,display-truncation-length", NULL);
+                        of_node_put(root);
                 }
                 display_character = rtas_token("display-character");
                 set_indicator = rtas_token("set-indicator");
diff --git a/arch/powerpc/kernel/sysfs.c b/arch/powerpc/kernel/sysfs.c
index 6fc27e771b5a..933e214c33e8 100644
--- a/arch/powerpc/kernel/sysfs.c
+++ b/arch/powerpc/kernel/sysfs.c
@@ -66,7 +66,7 @@ static int __init smt_setup(void)
         if (!cpu_has_feature(CPU_FTR_SMT))
                 return -ENODEV;
 
-        options = find_path_device("/options");
+        options = of_find_node_by_path("/options");
         if (!options)
                 return -ENODEV;
 
@@ -76,6 +76,7 @@ static int __init smt_setup(void)
                         per_cpu(smt_snooze_delay, cpu) = *val;
         }
 
+        of_node_put(options);
         return 0;
 }
 __initcall(smt_setup);
diff --git a/arch/powerpc/platforms/chrp/pci.c b/arch/powerpc/platforms/chrp/pci.c
index b23e39796a0b..de776e3889e3 100644
--- a/arch/powerpc/platforms/chrp/pci.c
+++ b/arch/powerpc/platforms/chrp/pci.c
@@ -185,10 +185,9 @@ setup_python(struct pci_controller *hose, struct device_node *dev)
 /* Marvell Discovery II based Pegasos 2 */
 static void __init setup_peg2(struct pci_controller *hose, struct device_node *dev)
 {
-        struct device_node *root = find_path_device("/");
+        struct device_node *root = of_find_node_by_path("/");
         struct device_node *rtas;
 
-        of_node_get(root);
         rtas = of_find_node_by_name (root, "rtas");
         if (rtas) {
                 hose->ops = &rtas_pci_ops;
@@ -198,6 +197,7 @@ static void __init setup_peg2(struct pci_controller *hose, struct device_node *d
                         " your firmware\n");
         }
         pci_assign_all_buses = 1;
+        /* keep the reference to the root node */
 }
 
 void __init
@@ -210,7 +210,7 @@ chrp_find_bridges(void)
         const unsigned int *dma;
         const char *model, *machine;
         int is_longtrail = 0, is_mot = 0, is_pegasos = 0;
-        struct device_node *root = find_path_device("/");
+        struct device_node *root = of_find_node_by_path("/");
         struct resource r;
         /*
          * The PCI host bridge nodes on some machines don't have
@@ -309,6 +309,7 @@ chrp_find_bridges(void)
                         printk("pci_dram_offset = %lx\n", pci_dram_offset);
                 }
         }
+        of_node_put(root);
 }
 
 /* SL82C105 IDE Control/Status Register */
diff --git a/arch/powerpc/platforms/chrp/setup.c b/arch/powerpc/platforms/chrp/setup.c
index 05d1bc0c8918..e46c4d4a5804 100644
--- a/arch/powerpc/platforms/chrp/setup.c
+++ b/arch/powerpc/platforms/chrp/setup.c
@@ -110,7 +110,7 @@ void chrp_show_cpuinfo(struct seq_file *m)
         struct device_node *root;
         const char *model = "";
 
-        root = find_path_device("/");
+        root = of_find_node_by_path("/");
         if (root)
                 model = of_get_property(root, "model", NULL);
         seq_printf(m, "machine\t\t: CHRP %s\n", model);
@@ -160,6 +160,7 @@ void chrp_show_cpuinfo(struct seq_file *m)
                            gg2_cachetypes[(t>>2) & 3],
                            gg2_cachemodes[t & 3]);
         }
+        of_node_put(root);
 }
 
 /*
@@ -204,7 +205,7 @@ static void __init sio_init(void)
 {
         struct device_node *root;
 
-        if ((root = find_path_device("/")) &&
+        if ((root = of_find_node_by_path("/")) &&
             !strncmp(of_get_property(root, "model", NULL),
                         "IBM,LongTrail", 13)) {
                 /* logical device 0 (KBC/Keyboard) */
@@ -212,6 +213,7 @@ static void __init sio_init(void)
                 /* select logical device 1 (KBC/Mouse) */
                 sio_fixup_irq("mouse", 1, 12, 2);
         }
+        of_node_put(root);
 }
 
 
@@ -250,7 +252,7 @@ static void briq_restart(char *cmd)
 
 void __init chrp_setup_arch(void)
 {
-        struct device_node *root = find_path_device ("/");
+        struct device_node *root = of_find_node_by_path("/");
         const char *machine = NULL;
 
         /* init to some ~sane value until calibrate_delay() runs */
@@ -273,6 +275,7 @@ void __init chrp_setup_arch(void)
                 /* Let's assume it is an IBM chrp if all else fails */
                 _chrp_type = _CHRP_IBM;
         }
+        of_node_put(root);
         printk("chrp type = %x [%s]\n", _chrp_type, chrp_names[_chrp_type]);
 
         rtas_initialize();
diff --git a/arch/powerpc/platforms/powermac/feature.c b/arch/powerpc/platforms/powermac/feature.c
index 103fcc4c5605..44f85507db3c 100644
--- a/arch/powerpc/platforms/powermac/feature.c
+++ b/arch/powerpc/platforms/powermac/feature.c
@@ -1044,6 +1044,7 @@ core99_reset_cpu(struct device_node *node, long param, long value)
         unsigned long flags;
         struct macio_chip *macio;
         struct device_node *np;
+        struct device_node *cpus;
         const int dflt_reset_lines[] = {        KL_GPIO_RESET_CPU0,
                                                 KL_GPIO_RESET_CPU1,
                                                 KL_GPIO_RESET_CPU2,
@@ -1053,10 +1054,10 @@ core99_reset_cpu(struct device_node *node, long param, long value)
         if (macio->type != macio_keylargo)
                 return -ENODEV;
 
-        np = find_path_device("/cpus");
-        if (np == NULL)
+        cpus = of_find_node_by_path("/cpus");
+        if (cpus == NULL)
                 return -ENODEV;
-        for (np = np->child; np != NULL; np = np->sibling) {
+        for (np = cpus->child; np != NULL; np = np->sibling) {
                 const u32 *num = of_get_property(np, "reg", NULL);
                 const u32 *rst = of_get_property(np, "soft-reset", NULL);
                 if (num == NULL || rst == NULL)
@@ -1066,6 +1067,7 @@ core99_reset_cpu(struct device_node *node, long param, long value)
                         break;
                 }
         }
+        of_node_put(cpus);
         if (np == NULL || reset_io == 0)
                 reset_io = dflt_reset_lines[param];
 
@@ -1497,15 +1499,16 @@ static long g5_reset_cpu(struct device_node *node, long param, long value)
         unsigned long flags;
         struct macio_chip *macio;
         struct device_node *np;
+        struct device_node *cpus;
 
         macio = &macio_chips[0];
         if (macio->type != macio_keylargo2 && macio->type != macio_shasta)
                 return -ENODEV;
 
-        np = find_path_device("/cpus");
-        if (np == NULL)
+        cpus = of_find_node_by_path("/cpus");
+        if (cpus == NULL)
                 return -ENODEV;
-        for (np = np->child; np != NULL; np = np->sibling) {
+        for (np = cpus->child; np != NULL; np = np->sibling) {
                 const u32 *num = of_get_property(np, "reg", NULL);
                 const u32 *rst = of_get_property(np, "soft-reset", NULL);
                 if (num == NULL || rst == NULL)
@@ -1515,6 +1518,7 @@ static long g5_reset_cpu(struct device_node *node, long param, long value)
                         break;
                 }
         }
+        of_node_put(cpus);
         if (np == NULL || reset_io == 0)
                 return -ENODEV;
 
@@ -2499,18 +2503,26 @@ found:
          * that all Apple OF revs did it properly, I do it the paranoid way.
          */
         while (uninorth_base && uninorth_rev > 3) {
-                struct device_node *np = find_path_device("/cpus");
-                if (!np || !np->child) {
+                struct device_node *cpus = of_find_node_by_path("/cpus");
+                struct device_node *np;
+
+                if (!cpus || !cpus->child) {
                         printk(KERN_WARNING "Can't find CPU(s) in device tree !\n");
+                        of_node_put(cpus);
                         break;
                 }
-                np = np->child;
+                np = cpus->child;
                 /* Nap mode not supported on SMP */
-                if (np->sibling)
+                if (np->sibling) {
+                        of_node_put(cpus);
                         break;
+                }
                 /* Nap mode not supported if flush-on-lock property is present */
-                if (of_get_property(np, "flush-on-lock", NULL))
+                if (of_get_property(np, "flush-on-lock", NULL)) {
+                        of_node_put(cpus);
                         break;
+                }
+                of_node_put(cpus);
                 powersave_nap = 1;
                 printk(KERN_DEBUG "Processor NAP mode on idle enabled.\n");
                 break;