diff options
| -rw-r--r-- | include/libfdt.h | 77 | ||||
| -rw-r--r-- | lib/libfdt/fdt_ro.c | 10 | ||||
| -rw-r--r-- | lib/libfdt/fdt_rw.c | 4 | ||||
| -rw-r--r-- | lib/libfdt/fdt_wip.c | 6 |
4 files changed, 55 insertions, 42 deletions
diff --git a/include/libfdt.h b/include/libfdt.h index b6a400a7a8..3b1c788f49 100644 --- a/include/libfdt.h +++ b/include/libfdt.h @@ -61,7 +61,7 @@ #define FDT_ERR_NOTFOUND 1 /* FDT_ERR_NOTFOUND: The requested node or property does not exist */ #define FDT_ERR_EXISTS 2 - /* FDT_ERR_EXISTS: Attemped to create a node or property which + /* FDT_ERR_EXISTS: Attempted to create a node or property which * already exists */ #define FDT_ERR_NOSPACE 3 /* FDT_ERR_NOSPACE: Operation needed to expand the device @@ -213,7 +213,7 @@ int fdt_next_subnode(const void *fdt, int offset); #define __fdt_set_hdr(name) \ static inline void fdt_set_##name(void *fdt, uint32_t val) \ { \ - struct fdt_header *fdth = (struct fdt_header*)fdt; \ + struct fdt_header *fdth = (struct fdt_header *)fdt; \ fdth->name = cpu_to_fdt32(val); \ } __fdt_set_hdr(magic); @@ -288,11 +288,13 @@ const char *fdt_string(const void *fdt, int stroffset); * @fdt: pointer to the device tree blob * * fdt_get_max_phandle retrieves the highest phandle in the given - * device tree + * device tree. This will ignore badly formatted phandles, or phandles + * with a value of 0 or -1. * * returns: * the highest phandle on success - * 0, if an error occurred + * 0, if no phandle was found in the device tree + * -1, if an error occurred */ uint32_t fdt_get_max_phandle(const void *fdt); @@ -356,8 +358,9 @@ int fdt_subnode_offset_namelen(const void *fdt, int parentoffset, * returns: * structure block offset of the requested subnode (>=0), on success * -FDT_ERR_NOTFOUND, if the requested subnode does not exist - * -FDT_ERR_BADOFFSET, if parentoffset did not point to an FDT_BEGIN_NODE tag - * -FDT_ERR_BADMAGIC, + * -FDT_ERR_BADOFFSET, if parentoffset did not point to an FDT_BEGIN_NODE + * tag + * -FDT_ERR_BADMAGIC, * -FDT_ERR_BADVERSION, * -FDT_ERR_BADSTATE, * -FDT_ERR_BADSTRUCTURE, @@ -366,13 +369,13 @@ int fdt_subnode_offset_namelen(const void *fdt, int parentoffset, int fdt_subnode_offset(const void *fdt, int parentoffset, const char *name); /** - * fdt_path_offset_namelen - find a tree node based on substring + * fdt_path_offset_namelen - find a tree node by its full path * @fdt: pointer to the device tree blob * @path: full path of the node to locate - * @namelen: number of characters of name to consider + * @namelen: number of characters of path to consider * - * Identical to fdt_path_offset(), but only examine the first - * namelen characters of path for matching the node path. + * Identical to fdt_path_offset(), but only consider the first namelen + * characters of path as the path name. */ int fdt_path_offset_namelen(const void *fdt, const char *path, int namelen); @@ -389,7 +392,8 @@ int fdt_path_offset_namelen(const void *fdt, const char *path, int namelen); * address). * * returns: - * structure block offset of the node with the requested path (>=0), on success + * structure block offset of the node with the requested path (>=0), on + * success * -FDT_ERR_BADPATH, given path does not begin with '/' or is invalid * -FDT_ERR_NOTFOUND, if the requested node does not exist * -FDT_ERR_BADMAGIC, @@ -416,10 +420,12 @@ static inline int fdt_path_offset(const void *fdt, const char *path) * * returns: * pointer to the node's name, on success - * If lenp is non-NULL, *lenp contains the length of that name (>=0) + * If lenp is non-NULL, *lenp contains the length of that name + * (>=0) * NULL, on error * if lenp is non-NULL *lenp contains an error code (<0): - * -FDT_ERR_BADOFFSET, nodeoffset did not point to FDT_BEGIN_NODE tag + * -FDT_ERR_BADOFFSET, nodeoffset did not point to FDT_BEGIN_NODE + * tag * -FDT_ERR_BADMAGIC, * -FDT_ERR_BADVERSION, * -FDT_ERR_BADSTATE, standard meanings @@ -468,23 +474,26 @@ int fdt_first_property_offset(const void *fdt, int nodeoffset); int fdt_next_property_offset(const void *fdt, int offset); /** - * fdt_for_each_property - iterate over all properties of a node - * @property_offset: property offset (int) + * fdt_for_each_property_offset - iterate over all properties of a node + * + * @property_offset: property offset (int, lvalue) * @fdt: FDT blob (const void *) * @node: node offset (int) * * This is actually a wrapper around a for loop and would be used like so: * - * fdt_for_each_property(fdt, node, property) { - * ... - * use property + * fdt_for_each_property_offset(property, fdt, node) { + * Use property * ... * } * + * if ((property < 0) && (property != -FDT_ERR_NOT_FOUND)) { + * Error handling + * } + * * Note that this is implemented as a macro and property is used as - * iterator in the loop. It should therefore be a locally allocated - * variable. The node variable on the other hand is never modified, so - * it can be constant or even a literal. + * iterator in the loop. The node variable can be constant or even a + * literal. */ #define fdt_for_each_property_offset(property, fdt, node) \ for (property = fdt_first_property_offset(fdt, node); \ @@ -527,8 +536,8 @@ const struct fdt_property *fdt_get_property_by_offset(const void *fdt, * @namelen: number of characters of name to consider * @lenp: pointer to an integer variable (will be overwritten) or NULL * - * Identical to fdt_get_property_namelen(), but only examine the first - * namelen characters of name for matching the property name. + * Identical to fdt_get_property(), but only examine the first namelen + * characters of name for matching the property name. */ const struct fdt_property *fdt_get_property_namelen(const void *fdt, int nodeoffset, @@ -555,7 +564,8 @@ const struct fdt_property *fdt_get_property_namelen(const void *fdt, * NULL, on error * if lenp is non-NULL, *lenp contains an error code (<0): * -FDT_ERR_NOTFOUND, node does not have named property - * -FDT_ERR_BADOFFSET, nodeoffset did not point to FDT_BEGIN_NODE tag + * -FDT_ERR_BADOFFSET, nodeoffset did not point to FDT_BEGIN_NODE + * tag * -FDT_ERR_BADMAGIC, * -FDT_ERR_BADVERSION, * -FDT_ERR_BADSTATE, @@ -647,7 +657,8 @@ static inline void *fdt_getprop_namelen_w(void *fdt, int nodeoffset, * NULL, on error * if lenp is non-NULL, *lenp contains an error code (<0): * -FDT_ERR_NOTFOUND, node does not have named property - * -FDT_ERR_BADOFFSET, nodeoffset did not point to FDT_BEGIN_NODE tag + * -FDT_ERR_BADOFFSET, nodeoffset did not point to FDT_BEGIN_NODE + * tag * -FDT_ERR_BADMAGIC, * -FDT_ERR_BADVERSION, * -FDT_ERR_BADSTATE, @@ -689,7 +700,7 @@ const char *fdt_get_alias_namelen(const void *fdt, const char *name, int namelen); /** - * fdt_get_alias - retreive the path referenced by a given alias + * fdt_get_alias - retrieve the path referenced by a given alias * @fdt: pointer to the device tree blob * @name: name of the alias th look up * @@ -749,11 +760,11 @@ int fdt_get_path(const void *fdt, int nodeoffset, char *buf, int buflen); * structure from the start to nodeoffset. * * returns: - * structure block offset of the node at node offset's ancestor * of depth supernodedepth (>=0), on success * -FDT_ERR_BADOFFSET, nodeoffset does not refer to a BEGIN_NODE tag -* -FDT_ERR_NOTFOUND, supernodedepth was greater than the depth of nodeoffset + * -FDT_ERR_NOTFOUND, supernodedepth was greater than the depth of + * nodeoffset * -FDT_ERR_BADMAGIC, * -FDT_ERR_BADVERSION, * -FDT_ERR_BADSTATE, @@ -1060,7 +1071,7 @@ int fdt_size_cells(const void *fdt, int nodeoffset); * @nodeoffset: offset of the node whose property to change * @name: name of the property to change * @namelen: number of characters of name to consider - * @index: index of the property to change in the array + * @idx: index of the property to change in the array * @val: pointer to data to replace the property value with * @len: length of the property value * @@ -1071,7 +1082,7 @@ int fdt_size_cells(const void *fdt, int nodeoffset); */ int fdt_setprop_inplace_namelen_partial(void *fdt, int nodeoffset, const char *name, int namelen, - uint32_t index, const void *val, + uint32_t idx, const void *val, int len); /** @@ -1700,9 +1711,11 @@ int fdt_add_subnode_namelen(void *fdt, int parentoffset, * change the offsets of some existing nodes. * returns: - * structure block offset of the created nodeequested subnode (>=0), on success + * structure block offset of the created nodeequested subnode (>=0), on + * success * -FDT_ERR_NOTFOUND, if the requested subnode does not exist - * -FDT_ERR_BADOFFSET, if parentoffset did not point to an FDT_BEGIN_NODE tag + * -FDT_ERR_BADOFFSET, if parentoffset did not point to an FDT_BEGIN_NODE + * tag * -FDT_ERR_EXISTS, if the node at parentoffset already has a subnode of * the given name * -FDT_ERR_NOSPACE, if there is insufficient free space in the diff --git a/lib/libfdt/fdt_ro.c b/lib/libfdt/fdt_ro.c index 9cc98db6e2..005f26736f 100644 --- a/lib/libfdt/fdt_ro.c +++ b/lib/libfdt/fdt_ro.c @@ -60,11 +60,11 @@ uint32_t fdt_get_max_phandle(const void *fdt) return max_phandle; if (offset < 0) - return 0; + return (uint32_t)-1; phandle = fdt_get_phandle(fdt, offset); if (phandle == (uint32_t)-1) - return 0; + continue; if (phandle > max_phandle) max_phandle = phandle; @@ -623,10 +623,8 @@ 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, diff --git a/lib/libfdt/fdt_rw.c b/lib/libfdt/fdt_rw.c index 47447b2bce..87d4030fb1 100644 --- a/lib/libfdt/fdt_rw.c +++ b/lib/libfdt/fdt_rw.c @@ -60,6 +60,8 @@ static int _fdt_splice(void *fdt, void *splicepoint, int oldlen, int newlen) if (((p + oldlen) < p) || ((p + oldlen) > end)) return -FDT_ERR_BADOFFSET; + if ((p < (char *)fdt) || ((end - oldlen + newlen) < (char *)fdt)) + return -FDT_ERR_BADOFFSET; if ((end - oldlen + newlen) > ((char *)fdt + fdt_totalsize(fdt))) return -FDT_ERR_NOSPACE; memmove(p + newlen, p + oldlen, end - p - oldlen); @@ -164,7 +166,7 @@ static int _fdt_resize_property(void *fdt, int nodeoffset, const char *name, int err; *prop = fdt_get_property_w(fdt, nodeoffset, name, &oldlen); - if (!(*prop)) + if (!*prop) return oldlen; if ((err = _fdt_splice_struct(fdt, (*prop)->data, FDT_TAGALIGN(oldlen), diff --git a/lib/libfdt/fdt_wip.c b/lib/libfdt/fdt_wip.c index 216c51287d..45fb964120 100644 --- a/lib/libfdt/fdt_wip.c +++ b/lib/libfdt/fdt_wip.c @@ -16,7 +16,7 @@ int fdt_setprop_inplace_namelen_partial(void *fdt, int nodeoffset, const char *name, int namelen, - uint32_t index, const void *val, + uint32_t idx, const void *val, int len) { void *propval; @@ -27,10 +27,10 @@ int fdt_setprop_inplace_namelen_partial(void *fdt, int nodeoffset, if (!propval) return proplen; - if (proplen < (len + index)) + if (proplen < (len + idx)) return -FDT_ERR_NOSPACE; - memcpy(propval + index, val, len); + memcpy((char *)propval + idx, val, len); return 0; } |