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-rw-r--r--drivers/input/mousedev.c15
1 files changed, 10 insertions, 5 deletions
diff --git a/drivers/input/mousedev.c b/drivers/input/mousedev.c
index 564974ce5793..96fb9870834a 100644
--- a/drivers/input/mousedev.c
+++ b/drivers/input/mousedev.c
@@ -101,6 +101,7 @@ struct mousedev_list {
unsigned char ready, buffer, bufsiz;
unsigned char imexseq, impsseq;
enum mousedev_emul mode;
+ unsigned long last_buttons;
};
#define MOUSEDEV_SEQ_LEN 6
@@ -224,7 +225,7 @@ static void mousedev_notify_readers(struct mousedev *mousedev, struct mousedev_h
spin_lock_irqsave(&list->packet_lock, flags);
p = &list->packets[list->head];
- if (list->ready && p->buttons != packet->buttons) {
+ if (list->ready && p->buttons != mousedev->packet.buttons) {
unsigned int new_head = (list->head + 1) % PACKET_QUEUE_LEN;
if (new_head != list->tail) {
p = &list->packets[list->head = new_head];
@@ -249,10 +250,13 @@ static void mousedev_notify_readers(struct mousedev *mousedev, struct mousedev_h
p->dz += packet->dz;
p->buttons = mousedev->packet.buttons;
- list->ready = 1;
+ if (p->dx || p->dy || p->dz || p->buttons != list->last_buttons)
+ list->ready = 1;
spin_unlock_irqrestore(&list->packet_lock, flags);
- kill_fasync(&list->fasync, SIGIO, POLL_IN);
+
+ if (list->ready)
+ kill_fasync(&list->fasync, SIGIO, POLL_IN);
}
wake_up_interruptible(&mousedev->wait);
@@ -477,9 +481,10 @@ static void mousedev_packet(struct mousedev_list *list, signed char *ps2_data)
}
if (!p->dx && !p->dy && !p->dz) {
- if (list->tail == list->head)
+ if (list->tail == list->head) {
list->ready = 0;
- else
+ list->last_buttons = p->buttons;
+ } else
list->tail = (list->tail + 1) % PACKET_QUEUE_LEN;
}