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| author | Jiri Kosina <jkosina@suse.cz> | 2013-06-19 23:52:11 +0200 |
|---|---|---|
| committer | Jiri Kosina <jkosina@suse.cz> | 2013-06-19 23:54:10 +0200 |
| commit | a688393bd3fb27690a77f7ae8607b4969039bac5 (patch) | |
| tree | fa7eee196868401562ce1be8d00c07904752ad1a /drivers | |
| parent | 6f1891d01956cad406d2af8ed2e9cef6108bfc5e (diff) | |
| download | linux-a688393bd3fb27690a77f7ae8607b4969039bac5.tar.gz linux-a688393bd3fb27690a77f7ae8607b4969039bac5.tar.bz2 linux-a688393bd3fb27690a77f7ae8607b4969039bac5.zip | |
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 <jkosina@suse.cz>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/hid/hid-input.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/drivers/hid/hid-input.c b/drivers/hid/hid-input.c index 82130cf724e4..9aeca6023617 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) && |