HID: explain the signed/unsigned handling in hid_add_field()

Put a comment that clarifies the condition that handles both signed
and unsigned case for logical min/max in hid_add_field().

Signed-off-by: Jiri Kosina <jkosina@suse.cz>

diff --git a/drivers/hid/hid-core.c b/drivers/hid/hid-core.c
index 0bfbc48..dc05d9b 100644 (file)
--- a/drivers/hid/hid-core.c
+++ b/drivers/hid/hid-core.c
@@ -230,6 +230,7 @@ static int hid_add_field(struct hid_parser *parser, unsigned report_type, unsign
                return -1;
        }
 
+       /* Handle both signed and unsigned cases properly */
        if ((parser->global.logical_minimum < 0 &&
                parser->global.logical_maximum <
                parser->global.logical_minimum) ||