Hi Vojtech,
On Tue, Aug 14, 2012 at 12:11:54AM +0200, Vojtech Bocek wrote:
> Initial input event has not yet arrived in joydev_connect()
> where values are set, which means default values of input_absinfo
> are used for init event, not the actual values from joystick.
So what guarantees that joystick events will arrive in time, before
joydev_generate_startup_event() is called? It looks like your solution
is racy...
I wonder if we should not generate the startup event until we have seen
at least one EV_SYN, i.e. entire device state has been transmitted to
us.
>
> Signed-off-by: Vojtech Bocek <vbocek@xxxxxxxxx>
> ---
> drivers/input/joydev.c | 9 +++++++--
> 1 file changed, 7 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/input/joydev.c b/drivers/input/joydev.c
> index 26043cc..11f24b4 100644
> --- a/drivers/input/joydev.c
> +++ b/drivers/input/joydev.c
> @@ -318,9 +318,14 @@ static int joydev_generate_startup_event(struct joydev_client *client,
> event->value = !!test_bit(joydev->keypam[event->number],
> input->key);
> } else {
> + int evnum = client->startup - joydev->nkey;
> + int val = input_abs_get_val(input, joydev->abspam[evnum]);
> +
> + joydev->abs[evnum] = joydev_correct(val, &joydev->corr[evnum]);
> +
> event->type = JS_EVENT_AXIS | JS_EVENT_INIT;
> - event->number = client->startup - joydev->nkey;
> - event->value = joydev->abs[event->number];
> + event->number = evnum;
> + event->value = joydev->abs[evnum];
> }
> client->startup++;
> }
> --
> 1.7.10.4
>
Thanks.
--
Dmitry
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