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-rw-r--r--drivers/input/input-mt.c30
1 files changed, 18 insertions, 12 deletions
diff --git a/drivers/input/input-mt.c b/drivers/input/input-mt.c
index c30204f2fa30..fbe29fcb15c5 100644
--- a/drivers/input/input-mt.c
+++ b/drivers/input/input-mt.c
@@ -236,6 +236,18 @@ void input_mt_report_pointer_emulation(struct input_dev *dev, bool use_count)
}
EXPORT_SYMBOL(input_mt_report_pointer_emulation);
+static void __input_mt_drop_unused(struct input_dev *dev, struct input_mt *mt)
+{
+ int i;
+
+ for (i = 0; i < mt->num_slots; i++) {
+ if (!input_mt_is_used(mt, &mt->slots[i])) {
+ input_mt_slot(dev, i);
+ input_event(dev, EV_ABS, ABS_MT_TRACKING_ID, -1);
+ }
+ }
+}
+
/**
* input_mt_drop_unused() - Inactivate slots not seen in this frame
* @dev: input device with allocated MT slots
@@ -245,19 +257,11 @@ EXPORT_SYMBOL(input_mt_report_pointer_emulation);
void input_mt_drop_unused(struct input_dev *dev)
{
struct input_mt *mt = dev->mt;
- int i;
- if (!mt)
- return;
-
- for (i = 0; i < mt->num_slots; i++) {
- if (!input_mt_is_used(mt, &mt->slots[i])) {
- input_mt_slot(dev, i);
- input_event(dev, EV_ABS, ABS_MT_TRACKING_ID, -1);
- }
+ if (mt) {
+ __input_mt_drop_unused(dev, mt);
+ mt->frame++;
}
-
- mt->frame++;
}
EXPORT_SYMBOL(input_mt_drop_unused);
@@ -278,12 +282,14 @@ void input_mt_sync_frame(struct input_dev *dev)
return;
if (mt->flags & INPUT_MT_DROP_UNUSED)
- input_mt_drop_unused(dev);
+ __input_mt_drop_unused(dev, mt);
if ((mt->flags & INPUT_MT_POINTER) && !(mt->flags & INPUT_MT_SEMI_MT))
use_count = true;
input_mt_report_pointer_emulation(dev, use_count);
+
+ mt->frame++;
}
EXPORT_SYMBOL(input_mt_sync_frame);