Commit 722612cd authored Jan 05, 2010 by Jiri Kosina

HID: fix parsing of local delimiter with size 0



Acording to HID standard 1.11, value 0 allows for size being 0.
Local delimiter tag has has 0 one of the possible values.

Therefore we need to handle this case properly, to be fully compliant
with the specification.

Reported-by: Marcin Tolysz <tolysz@gmail.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>

parent cf2f765f

drivers/hid/hid-core.c

+2 −1

Original line number	Diff line number	Diff line
		@@ -387,7 +387,8 @@ static int hid_parser_local(struct hid_parser parser, struct hid_item item)
		__u32 data;
		unsigned n;

		if (item->size == 0) {
		/* Local delimiter could have value 0, which allows size to be 0 */
		if (item->size == 0 && item->tag != HID_LOCAL_ITEM_TAG_DELIMITER) {
		dbg_hid("item data expected for local item\n");
		return -1;
		}