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HID: handle logical min/max signedness properly in parser

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When logical maximum is 0xffffffff, the parser fails even if
logical minimum is more than 0.

By HID specification this is a valid combination.

Signed-off-by: srinivas pandruvada <srinivas.pandruvada@intel.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
This commit is contained in:
srinivas pandruvada 2012-05-10 16:45:31 -07:00 committed by Jiri Kosina
parent d6d7c87352
commit 0cd516c246
1 changed files with 9 additions and 3 deletions
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12
drivers/hid/hid-core.c
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@ -230,9 +230,15 @@ static int hid_add_field(struct hid_parser *parser, unsigned report_type, unsign
return -1;
}
if (parser->global.logical_maximum < parser->global.logical_minimum) {
hid_err(parser->device, "logical range invalid %d %d\n",
parser->global.logical_minimum, parser->global.logical_maximum);
if ((parser->global.logical_minimum < 0 &&
parser->global.logical_maximum <
parser->global.logical_minimum) ||
(parser->global.logical_minimum >= 0 &&
(__u32)parser->global.logical_maximum <
(__u32)parser->global.logical_minimum)) {
dbg_hid("logical range invalid 0x%x 0x%x\n",
parser->global.logical_minimum,
parser->global.logical_maximum);
return -1;
}