help needed in this part of code regarding FF in hid-sony.c

4th attempt......

Hello to Mr. Roderick or to whom it may concren,

I am fei, a novice self-studied programming enthusiast, I need help
with hid-sony.c, but there is no relevant maintainer found in the
MAINTAINERS list, the closest is you, Mr. Roderick as the maintainer
of hid-playstation.c, so I just try my luck here, hope you don't mind.

The scenario as follow:

I have added a feature to make initial rumble vibrates when devices
are connected, code as follow (sony_play_effect() as reference) :

add delay.h

-----------------------------
#include <linux/delay.h>
-----------------------------





define a global variable "init_rumble"

------------------------------
......#define SONY_FF_SUPPORT (SIXAXIS_CONTROLLER | DUALSHOCK4_CONTROLLER)

bool init_rumble;
#define SONY_BT_DEVICE......
------------------------------




declare "init_rumble = true;" in sony_probe()


actual part

------------------------------
static int sony_init_ff_play(struct input_dev *dev)
{
    struct hid_device *hid = input_get_drvdata(dev);
    struct sony_sc *sc = hid_get_drvdata(hid);

    sc->left = 255;
    sc->right = 255;

/*needed for non bt connection or else won't work, reason unknown*/
    if (!(sc->quirks & SONY_BT_DEVICE))
          sony_schedule_work(sc, SONY_WORKER_STATE);

    /*length-ing magnitude above*/
    msleep(350);

    sc->left = 0;
    sc->right = 0;
    sony_schedule_work(sc, SONY_WORKER_STATE);

    init_rumble = false;

    return 0;
}
-------------------------------




and called from sony_init_ff()

--------------------------------
......input_set_capability(input_dev, EV_FF, FF_RUMBLE);

if (init_rumble == true) {
    sony_init_ff_play(input_dev);
}

return input_ff_create_memless(input_dev......
--------------------------------




it works flawlessly without any error. Since it's identical to
sony_play_effect(), so i just tried to merge them together into
sony_play_effect() to reduce redundancy as follow:

------------------------------------
static int sony_play_effect(struct input_dev *dev, void *data,
   struct ff_effect *effect)
{
    struct hid_device *hid = input_get_drvdata(dev);
    struct sony_sc *sc = hid_get_drvdata(hid);

    if (effect->type != FF_RUMBLE)
        return 0;

    if (init_rumble == true)
    {
          sc->left = 255;
          sc->right = 255;

          if (!(sc->quirks & SONY_BT_DEVICE))
              sony_schedule_work(sc, SONY_WORKER_STATE);

          msleep(400);

          sc->left = 0;
          sc->right = 0;
          sony_schedule_work(sc, SONY_WORKER_STATE);

          init_rumble = false;
          return 0;
    }

    sc->left = effect->u.rumble.strong_magnitude / 256;
    sc->right = effect->u.rumble.weak_magnitude / 256;

    sony_schedule_work(sc, SONY_WORKER_STATE);

    return 0;
}
-----------------------------------------------




called it from sony_init_ff()

----------------------------------------------
 ......input_set_capability(input_dev, EV_FF, FF_RUMBLE);

   if (init_rumble == true) {
       sony_play_effect(input_dev, NULL, NULL);
   }

return input_ff_create_memless(input_dev......
------------------------------------------------




but end up whole system being freezed up, what could possibly going
wrong here? Thx in advance.

Regards,
fei