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[PATCH] fix jumpy mouse cursor on console 

Do not send empty events to gpm.  (Keyboards are assumed to have scroll
wheel these days, that makes them part-mouse.  That means typing on
keyboard generates empty mouse events).

From: Dmitry Torokhov <dtor_core@ameritech.net>
Signed-off-by: Pavel Machek <pavel@suse.cz>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Pavel Machek 2005-05-27 12:53:03 -07:00 committed by Linus Torvalds
parent 8bd7f125e2
commit c1e4c8d3ee
1 changed files with 10 additions and 5 deletions
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15
drivers/input/mousedev.c
View File

@ -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;
}