*pprev = NULL;
}
-static bool populate_node(const void *blob,
+static int populate_node(const void *blob,
int offset,
void **mem,
struct device_node *dad,
{
struct device_node *np;
const char *pathp;
- unsigned int l, allocl;
+ int len;
- pathp = fdt_get_name(blob, offset, &l);
+ pathp = fdt_get_name(blob, offset, &len);
if (!pathp) {
*pnp = NULL;
- return false;
+ return len;
}
- allocl = ++l;
+ len++;
- np = unflatten_dt_alloc(mem, sizeof(struct device_node) + allocl,
+ np = unflatten_dt_alloc(mem, sizeof(struct device_node) + len,
__alignof__(struct device_node));
if (!dryrun) {
char *fn;
of_node_init(np);
np->full_name = fn = ((char *)np) + sizeof(*np);
- memcpy(fn, pathp, l);
+ memcpy(fn, pathp, len);
if (dad != NULL) {
np->parent = dad;
* @dad: Parent struct device_node
* @nodepp: The device_node tree created by the call
*
- * It returns the size of unflattened device tree or error code
+ * Return: The size of unflattened device tree or error code
*/
static int unflatten_dt_nodes(const void *blob,
void *mem,
struct device_node *nps[FDT_MAX_DEPTH];
void *base = mem;
bool dryrun = !base;
+ int ret;
if (nodepp)
*nodepp = NULL;
!of_fdt_device_is_available(blob, offset))
continue;
- if (!populate_node(blob, offset, &mem, nps[depth],
- &nps[depth+1], dryrun))
- return mem - base;
+ ret = populate_node(blob, offset, &mem, nps[depth],
+ &nps[depth+1], dryrun);
+ if (ret < 0)
+ return ret;
if (!dryrun && nodepp && !*nodepp)
*nodepp = nps[depth+1];
/**
* __unflatten_device_tree - create tree of device_nodes from flat blob
- *
- * unflattens a device-tree, creating the
- * tree of struct device_node. It also fills the "name" and "type"
- * pointers of the nodes so the normal device-tree walking functions
- * can be used.
* @blob: The blob to expand
* @dad: Parent device node
* @mynodes: The device_node tree created by the call
* for the resulting tree
* @detached: if true set OF_DETACHED on @mynodes
*
- * Returns NULL on failure or the memory chunk containing the unflattened
+ * unflattens a device-tree, creating the tree of struct device_node. It also
+ * fills the "name" and "type" pointers of the nodes so the normal device-tree
+ * walking functions can be used.
+ *
+ * Return: NULL on failure or the memory chunk containing the unflattened
* device tree on success.
*/
void *__unflatten_device_tree(const void *blob,
{
int size;
void *mem;
+ int ret;
+
+ if (mynodes)
+ *mynodes = NULL;
pr_debug(" -> unflatten_device_tree()\n");
/* First pass, scan for size */
size = unflatten_dt_nodes(blob, NULL, dad, NULL);
- if (size < 0)
+ if (size <= 0)
return NULL;
size = ALIGN(size, 4);
pr_debug(" unflattening %p...\n", mem);
/* Second pass, do actual unflattening */
- unflatten_dt_nodes(blob, mem, dad, mynodes);
+ ret = unflatten_dt_nodes(blob, mem, dad, mynodes);
+
if (be32_to_cpup(mem + size) != 0xdeadbeef)
pr_warn("End of tree marker overwritten: %08x\n",
be32_to_cpup(mem + size));
- if (detached && mynodes) {
+ if (ret <= 0)
+ return NULL;
+
+ if (detached && mynodes && *mynodes) {
of_node_set_flag(*mynodes, OF_DETACHED);
pr_debug("unflattened tree is detached\n");
}
* pointers of the nodes so the normal device-tree walking functions
* can be used.
*
- * Returns NULL on failure or the memory chunk containing the unflattened
+ * Return: NULL on failure or the memory chunk containing the unflattened
* device tree on success.
*/
void *of_fdt_unflatten_tree(const unsigned long *blob,
static u32 of_fdt_crc32;
-/**
+/*
* __reserved_mem_reserve_reg() - reserve all memory described in 'reg' property
*/
static int __init __reserved_mem_reserve_reg(unsigned long node,
return 0;
}
-/**
+/*
* __reserved_mem_check_root() - check if #size-cells, #address-cells provided
* in /reserved-memory matches the values supported by the current implementation,
* also check if ranges property has been provided
return 0;
}
-/**
- * fdt_scan_reserved_mem() - scan a single FDT node for reserved memory
+/*
+ * __fdt_scan_reserved_mem() - scan a single FDT node for reserved memory
*/
static int __init __fdt_scan_reserved_mem(unsigned long node, const char *uname,
int depth, void *data)
/**
* of_scan_flat_dt_subnodes - scan sub-nodes of a node call callback on each.
+ * @parent: parent node
* @it: callback function
* @data: context data pointer
*
return fdt_subnode_offset(initial_boot_params, node, uname);
}
-/**
+/*
* of_get_flat_dt_root - find the root node in the flat blob
*/
unsigned long __init of_get_flat_dt_root(void)
return 0;
}
-/**
+/*
* of_get_flat_dt_prop - Given a node in the flat blob, return the property ptr
*
* This function can be used within scan_flattened_dt callback to get
* @node: node to test
* @compat: compatible string to compare with compatible list.
*
- * On match, returns a non-zero value with smaller values returned for more
+ * Return: a non-zero value on match with smaller values returned for more
* specific compatible values.
*/
static int of_fdt_is_compatible(const void *blob,
return of_fdt_is_compatible(initial_boot_params, node, compat);
}
-/**
+/*
* of_flat_dt_match - Return true if node matches a list of compatible values
*/
static int __init of_flat_dt_match(unsigned long node, const char *const *compat)
return score;
}
-/**
- * of_get_flat_dt_prop - Given a node in the flat blob, return the phandle
+/*
+ * of_get_flat_dt_phandle - Given a node in the flat blob, return the phandle
*/
uint32_t __init of_get_flat_dt_phandle(unsigned long node)
{
}
#endif
-/**
+/*
* early_init_dt_scan_root - fetch the top level address and size cells
*/
int __init early_init_dt_scan_root(unsigned long node, const char *uname,
return of_read_number(p, s);
}
-/**
+/*
* early_init_dt_scan_memory - Look for and parse memory nodes
*/
int __init early_init_dt_scan_memory(unsigned long node, const char *uname,
projects / linux-2.6-microblaze.git / blobdiff