diff options
Diffstat (limited to 'drivers/input/input-mt.c')
| -rw-r--r-- | drivers/input/input-mt.c | 14 |
1 files changed, 9 insertions, 5 deletions
diff --git a/drivers/input/input-mt.c b/drivers/input/input-mt.c index a1bbec9cda8d..6c7326c93721 100644 --- a/drivers/input/input-mt.c +++ b/drivers/input/input-mt.c @@ -49,7 +49,7 @@ int input_mt_init_slots(struct input_dev *dev, unsigned int num_slots, if (mt) return mt->num_slots != num_slots ? -EINVAL : 0; - mt = kzalloc(sizeof(*mt) + num_slots * sizeof(*mt->slots), GFP_KERNEL); + mt = kzalloc(struct_size(mt, slots, num_slots), GFP_KERNEL); if (!mt) goto err_mem; @@ -131,8 +131,10 @@ EXPORT_SYMBOL(input_mt_destroy_slots); * inactive, or if the tool type is changed, a new tracking id is * assigned to the slot. The tool type is only reported if the * corresponding absbit field is set. + * + * Returns true if contact is active. */ -void input_mt_report_slot_state(struct input_dev *dev, +bool input_mt_report_slot_state(struct input_dev *dev, unsigned int tool_type, bool active) { struct input_mt *mt = dev->mt; @@ -140,22 +142,24 @@ void input_mt_report_slot_state(struct input_dev *dev, int id; if (!mt) - return; + return false; slot = &mt->slots[mt->slot]; slot->frame = mt->frame; if (!active) { input_event(dev, EV_ABS, ABS_MT_TRACKING_ID, -1); - return; + return false; } id = input_mt_get_value(slot, ABS_MT_TRACKING_ID); - if (id < 0 || input_mt_get_value(slot, ABS_MT_TOOL_TYPE) != tool_type) + if (id < 0) id = input_mt_new_trkid(mt); input_event(dev, EV_ABS, ABS_MT_TRACKING_ID, id); input_event(dev, EV_ABS, ABS_MT_TOOL_TYPE, tool_type); + + return true; } EXPORT_SYMBOL(input_mt_report_slot_state); |