From a688393bd3fb27690a77f7ae8607b4969039bac5 Mon Sep 17 00:00:00 2001 From: Jiri Kosina Date: Wed, 19 Jun 2013 23:52:11 +0200 Subject: [PATCH] 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: Jiri Kosina --- drivers/hid/hid-input.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/drivers/hid/hid-input.c b/drivers/hid/hid-input.c index 82130cf..9aeca60 100644 --- a/drivers/hid/hid-input.c +++ b/drivers/hid/hid-input.c @@ -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) && -- 2.7.4