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HID: core: Add reserved item tag for main items

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For main items, separate warning of reserved item tag from
warning of unknown item tag.
This comes from 6.2.2.4 Main Items of Device Class Definition
for HID 1.11 specification.

Signed-off-by: Tatsuya S <tatsuya.s2862@gmail.com>
Signed-off-by: Jiri Kosina <jkosina@suse.com>
This commit is contained in:
Tatsuya S 2025-01-06 16:49:11 +09:00 • committed by Jiri Kosina
parent 27c0278477
commit c600a55922
2 changed files with 7 additions and 1 deletions
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6
drivers/hid/hid-core.c
View file

@ -657,7 +657,11 @@ static int hid_parser_main(struct hid_parser *parser, struct hid_item *item)
ret = hid_add_field(parser, HID_FEATURE_REPORT, data);
break;
default:
hid_warn(parser->device, "unknown main item tag 0x%x\n", item->tag);
if (item->tag >= HID_MAIN_ITEM_TAG_RESERVED_MIN &&
item->tag <= HID_MAIN_ITEM_TAG_RESERVED_MAX)
hid_warn(parser->device, "reserved main item tag 0x%x\n", item->tag);
else
hid_warn(parser->device, "unknown main item tag 0x%x\n", item->tag);
ret = 0;
}

2
include/linux/hid.h
View file

@ -81,6 +81,8 @@ struct hid_item {
#define HID_MAIN_ITEM_TAG_FEATURE 11
#define HID_MAIN_ITEM_TAG_BEGIN_COLLECTION 10
#define HID_MAIN_ITEM_TAG_END_COLLECTION 12
#define HID_MAIN_ITEM_TAG_RESERVED_MIN 13
#define HID_MAIN_ITEM_TAG_RESERVED_MAX 15
/*
* HID report descriptor main item contents