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HID: cougar: Stop processing vendor events on hid-core 

Special key events received by the custom vendor's hdev are
translated to key events on the kbd iface's input device, so
their processing must not continue. Return -EPERM from
raw_event handler to effectively stop source events from
being processed in hid-core.

Signed-off-by: Daniel M. Lambea <dmlambea@gmail.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
This commit is contained in:
Daniel M. Lambea 2018-07-27 21:19:12 +01:00 committed by Jiri Kosina
parent 6b003a8ddd
commit 75f1f19bdd
1 changed files with 13 additions and 7 deletions
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20
drivers/hid/hid-cougar.c
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@ -261,26 +261,32 @@ static int cougar_raw_event(struct hid_device *hdev, struct hid_report *report,
u8 *data, int size)
{
struct cougar *cougar;
struct cougar_shared *shared;
unsigned char code, action;
int i;
cougar = hid_get_drvdata(hdev);
if (!cougar->special_intf || !cougar->shared ||
!cougar->shared->input || !cougar->shared->enabled)
shared = cougar->shared;
if (!cougar->special_intf || !shared)
return 0;
if (!shared->enabled || !shared->input)
return -EPERM;
code = data[COUGAR_FIELD_CODE];
action = data[COUGAR_FIELD_ACTION];
for (i = 0; cougar_mapping[i][0]; i++) {
if (code == cougar_mapping[i][0]) {
input_event(cougar->shared->input, EV_KEY,
input_event(shared->input, EV_KEY,
cougar_mapping[i][1], action);
input_sync(cougar->shared->input);
return 0;
input_sync(shared->input);
return -EPERM;
}
}
hid_warn(hdev, "unmapped special key code %x: ignoring\n", code);
return 0;
/* Avoid warnings on the same unmapped key twice */
if (action != 0)
hid_warn(hdev, "unmapped special key code %0x: ignoring\n", code);
return -EPERM;
}
static void cougar_remove(struct hid_device *hdev)