of_property_read_string_array() is documented to return the number of strings present in a string array property if its target string buffer is NULL. What is not documented, however, is that is returned if the buffer is non-NULL. It returns the number of strings read. Document this, as well as the error codes. Signed-off-by: Sakari Ailus <sakari.ailus@xxxxxxxxxxxxxxx> --- include/linux/of.h | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/include/linux/of.h b/include/linux/of.h index d72f010..5856765 100644 --- a/include/linux/of.h +++ b/include/linux/of.h @@ -952,7 +952,11 @@ static inline int of_property_count_u64_elems(const struct device_node *np, * Search for a property in a device tree node and retrieve a list of * terminated string values (pointer to data, not a copy) in that property. * - * If @out_strs is NULL, the number of strings in the property is returned. + * If @out_strs is NULL, the number of strings in the property is returned. If + * $out_strs is non-NULL, returns the number of strings read. On error, the + * function returns -EINVAL if the property does not exist, -ENODATA if + * property does not have a value, and -EILSEQ if the string is not + * null-terminated within the length of the property data. */ static inline int of_property_read_string_array(const struct device_node *np, const char *propname, const char **out_strs, -- 2.7.4 -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
