diff options
Diffstat (limited to 'drivers/input/mousedev.c')
| -rw-r--r-- | drivers/input/mousedev.c | 15 |
1 files changed, 10 insertions, 5 deletions
diff --git a/drivers/input/mousedev.c b/drivers/input/mousedev.c index 564974ce579..96fb9870834 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; } |