提交 a688393b 编写于 作者: J Jiri Kosina

HID: explain out-of-range check better

Extend the comment explaining the condition for discarding
out-of-range values to clarify the cases in which devices don't
provide any logical min/max.
Signed-off-by: NJiri Kosina <jkosina@suse.cz>
上级 6f1891d0
......@@ -1042,7 +1042,11 @@ void hidinput_hid_event(struct hid_device *hid, struct hid_field *field, struct
/*
* Ignore out-of-range values as per HID specification,
* section 5.10 and 6.2.25
* section 5.10 and 6.2.25.
*
* The logical_minimum < logical_maximum check is done so that we
* don't unintentionally discard values sent by devices which
* don't specify logical min and max.
*/
if ((field->flags & HID_MAIN_ITEM_VARIABLE) &&
(field->logical_minimum < field->logical_maximum) &&
......
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