[PATCH 1/3] fs_parser: handle parameters that can be empty and don't have a value

[Luis Henriques]

Currently, only parameters that have the fs_parameter_spec 'type' set to
NULL are handled as 'flag' types.  However, parameters that have the
'fs_param_can_be_empty' flag set and their value is NULL should also be
handled as 'flag' type, as their type is set to 'fs_value_is_flag'.

Signed-off-by: Luis Henriques <lhenriques@xxxxxxx>
---
 fs/fs_parser.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/fs/fs_parser.c b/fs/fs_parser.c
index edb3712dcfa5..53f6cb98a3e0 100644
--- a/fs/fs_parser.c
+++ b/fs/fs_parser.c
@@ -119,7 +119,8 @@ int __fs_parse(struct p_log *log,
 	/* Try to turn the type we were given into the type desired by the
 	 * parameter and give an error if we can't.
 	 */
-	if (is_flag(p)) {
+	if (is_flag(p) ||
+	    (!param->string && (p->flags & fs_param_can_be_empty))) {
 		if (param->type != fs_value_is_flag)
 			return inval_plog(log, "Unexpected value for '%s'",
 				      param->key);