It turns out that certain hardware sometime generates unexpected movement during normal operation. This patch tries to filter out these erratic movements which will cause unexpected cursor jumping to the top-left corner. Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=43197 Reported-by: Aleksey Spiridonov <leks13@xxxxxxxxx> Tested-by: Aleksey Spiridonov <leks13@xxxxxxxxx> Signed-off-by: Tai-hwa Liang <avatar@xxxxxxxxxxxx> --- drivers/input/mouse/sentelic.c | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/drivers/input/mouse/sentelic.c b/drivers/input/mouse/sentelic.c index 3f5649f..48967a4 100644 --- a/drivers/input/mouse/sentelic.c +++ b/drivers/input/mouse/sentelic.c @@ -721,6 +721,14 @@ static psmouse_ret_t fsp_process_byte(struct psmouse *psmouse) switch (psmouse->packet[0] >> FSP_PKT_TYPE_SHIFT) { case FSP_PKT_TYPE_ABS: + if ((packet[0] == 0x48 || packet[0] == 0x49) && + packet[1] == 0 && packet[2] == 0) { + /* + * filtering out erratic movement which will cause + * unexpected cursor jumping to top-left corner + */ + packet[3] &= 0xf0; + } abs_x = GET_ABS_X(packet); abs_y = GET_ABS_Y(packet); -- 1.7.10 -- To unsubscribe from this list: send the line "unsubscribe linux-input" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
