Devicetree for 4.7:

- Rewrite of the unflattening code to avoid recursion and lessen the
   stack usage.
 
 - Rewrite of the phandle args parsing code to get rid of the fixed args
   size. This is needed for IOMMU code.
 
 - Sync to latest dtc which adds more dts style checking. These warnings
   are enabled with "W=1" compiles.
 
 - Tegra documentation updates related to the above warnings.
 
 - A bunch of spelling and other doc fixes.
 
 - Various vendor prefix additions.
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Merge tag 'devicetree-for-4.7' of git://git.kernel.org/pub/scm/linux/kernel/git/robh/linux

Pull devicetree updates from Rob Herring:

 - Rewrite of the unflattening code to avoid recursion and lessen the
   stack usage.

 - Rewrite of the phandle args parsing code to get rid of the fixed args
   size.  This is needed for IOMMU code.

 - Sync to latest dtc which adds more dts style checking.  These
   warnings are enabled with "W=1" compiles.

 - Tegra documentation updates related to the above warnings.

 - A bunch of spelling and other doc fixes.

 - Various vendor prefix additions.

* tag 'devicetree-for-4.7' of git://git.kernel.org/pub/scm/linux/kernel/git/robh/linux: (52 commits)
  devicetree: Add Creative Technology vendor id
  gpio: dt-bindings: add ibm,ppc4xx-gpio binding
  of/unittest: Remove unnecessary module.h header inclusion
  drivers/of: Fix build warning in populate_node()
  drivers/of: Fix depth when unflattening devicetree
  of: dynamic: changeset prop-update revert fix
  drivers/of: Export of_detach_node()
  drivers/of: Return allocated memory from of_fdt_unflatten_tree()
  drivers/of: Specify parent node in of_fdt_unflatten_tree()
  drivers/of: Rename unflatten_dt_node()
  drivers/of: Avoid recursively calling unflatten_dt_node()
  drivers/of: Split unflatten_dt_node()
  of: include errno.h in of_graph.h
  of: document refcount incrementation of of_get_cpu_node()
  Documentation: dt: soc: fix spelling mistakes
  Documentation: dt: power: fix spelling mistake
  Documentation: dt: pinctrl: fix spelling mistake
  Documentation: dt: opp: fix spelling mistake
  Documentation: dt: net: fix spelling mistakes
  Documentation: dt: mtd: fix spelling mistake
  ...

scripts/Makefile.lib

@@ -277,6 +277,11 @@ cmd_gzip = (cat $(filter-out FORCE,$^) | gzip -n -f -9 > $@) || \
 # ---------------------------------------------------------------------------
 DTC ?= $(objtree)/scripts/dtc/dtc
 
+# Disable noisy checks by default
+ifeq ($(KBUILD_ENABLE_EXTRA_GCC_CHECKS),)
+DTC_FLAGS += -Wno-unit_address_vs_reg
+endif
+
 # Generate an assembly file to wrap the output of the device tree compiler
 quiet_cmd_dt_S_dtb= DTB     $@
 cmd_dt_S_dtb=						\

scripts/dtc/checks.c

@@ -294,6 +294,30 @@ static void check_node_name_format(struct check *c, struct node *dt,
 }
 NODE_ERROR(node_name_format, NULL, &node_name_chars);
 
+static void check_unit_address_vs_reg(struct check *c, struct node *dt,
+			     struct node *node)
+{
+	const char *unitname = get_unitname(node);
+	struct property *prop = get_property(node, "reg");
+
+	if (!prop) {
+		prop = get_property(node, "ranges");
+		if (prop && !prop->val.len)
+			prop = NULL;
+	}
+
+	if (prop) {
+		if (!unitname[0])
+			FAIL(c, "Node %s has a reg or ranges property, but no unit name",
+			    node->fullpath);
+	} else {
+		if (unitname[0])
+			FAIL(c, "Node %s has a unit name, but no reg property",
+			    node->fullpath);
+	}
+}
+NODE_WARNING(unit_address_vs_reg, NULL);
+
 static void check_property_name_chars(struct check *c, struct node *dt,
 				      struct node *node, struct property *prop)
 {
@@ -667,6 +691,8 @@ static struct check *check_table[] = {
 
 	&addr_size_cells, &reg_format, &ranges_format,
 
+	&unit_address_vs_reg,
+
 	&avoid_default_addr_size,
 	&obsolete_chosen_interrupt_controller,
 

scripts/dtc/flattree.c

@@ -889,7 +889,7 @@ struct boot_info *dt_from_blob(const char *fname)
 
 	if (version >= 3) {
 		uint32_t size_str = fdt32_to_cpu(fdt->size_dt_strings);
-		if (off_str+size_str > totalsize)
+		if ((off_str+size_str < off_str) || (off_str+size_str > totalsize))
 			die("String table extends past total size\n");
 		inbuf_init(&strbuf, blob + off_str, blob + off_str + size_str);
 	} else {
@@ -898,7 +898,7 @@ struct boot_info *dt_from_blob(const char *fname)
 
 	if (version >= 17) {
 		size_dt = fdt32_to_cpu(fdt->size_dt_struct);
-		if (off_dt+size_dt > totalsize)
+		if ((off_dt+size_dt < off_dt) || (off_dt+size_dt > totalsize))
 			die("Structure block extends past total size\n");
 	}
 

scripts/dtc/libfdt/fdt_ro.c

@@ -647,10 +647,8 @@ int fdt_node_check_compatible(const void *fdt, int nodeoffset,
 	prop = fdt_getprop(fdt, nodeoffset, "compatible", &len);
 	if (!prop)
 		return len;
-	if (fdt_stringlist_contains(prop, len, compatible))
-		return 0;
-	else
-		return 1;
+
+	return !fdt_stringlist_contains(prop, len, compatible);
 }
 
 int fdt_node_offset_by_compatible(const void *fdt, int startoffset,

scripts/dtc/version_gen.h

@@ -1 +1 @@
-#define DTC_VERSION "DTC 1.4.1-gb06e55c8"
+#define DTC_VERSION "DTC 1.4.1-g53bf130b"