diff options
| -rw-r--r-- | drivers/of/base.c | 22 |
1 files changed, 16 insertions, 6 deletions
diff --git a/drivers/of/base.c b/drivers/of/base.c index cf04d4dd4a53..cd17092b82bd 100644 --- a/drivers/of/base.c +++ b/drivers/of/base.c @@ -499,8 +499,8 @@ EXPORT_SYMBOL_GPL(of_modalias_node); * @list_name: property name that contains a list * @cells_name: property name that specifies phandles' arguments count * @index: index of a phandle to parse out - * @out_node: pointer to device_node struct pointer (will be filled) - * @out_args: pointer to arguments pointer (will be filled) + * @out_node: optional pointer to device_node struct pointer (will be filled) + * @out_args: optional pointer to arguments pointer (will be filled) * * This function is useful to parse lists of phandles and their arguments. * Returns 0 on success and fills out_node and out_args, on error returns @@ -534,7 +534,7 @@ int of_parse_phandles_with_args(struct device_node *np, const char *list_name, int size; int cur_index = 0; struct device_node *node = NULL; - const void *args; + const void *args = NULL; list = of_get_property(np, list_name, &size); if (!list) { @@ -580,16 +580,26 @@ next: of_node_put(node); node = NULL; + args = NULL; cur_index++; } if (!node) { - ret = -ENOENT; + /* + * args w/o node indicates that the loop above has stopped at + * the 'hole' cell. Report this differently. + */ + if (args) + ret = -EEXIST; + else + ret = -ENOENT; goto err0; } - *out_node = node; - *out_args = args; + if (out_node) + *out_node = node; + if (out_args) + *out_args = args; return 0; err1: |