On Sun, Nov 01, 2015 at 04:31:38PM +0100, Pavel Rojtberg wrote:
> From: Pavel Rojtberg <rojtb...@gmail.com>
>
> the irq_out urb is dead after suspend/ resume on my x360 wr pad. (also
> reproduced by Zachary Lund [0]) Work around this by resetting the usb
> device on resume. Added suspend/ resume callbacks to do so.
>
> [0]: https://github.com/paroj/xpad/issues/6
>
> Signed-off-by: Pavel Rojtberg <rojtb...@gmail.com>
> ---
> drivers/input/joystick/xpad.c | 30 ++++++++++++++++++++++++++----
> 1 file changed, 26 insertions(+), 4 deletions(-)
>
> diff --git a/drivers/input/joystick/xpad.c b/drivers/input/joystick/xpad.c
> index f3754c7..e8dcc80 100644
> --- a/drivers/input/joystick/xpad.c
> +++ b/drivers/input/joystick/xpad.c
> @@ -1423,17 +1423,23 @@ err_free_mem:
>
> }
>
> -static void xpad_disconnect(struct usb_interface *intf)
> +static void xpad_stop_communication(struct usb_xpad *xpad)
> {
> - struct usb_xpad *xpad = usb_get_intfdata (intf);
> -
> - xpad_deinit_output(xpad);
> + xpad_stop_output(xpad);
>
> if (xpad->xtype == XTYPE_XBOX360W) {
> usb_kill_urb(xpad->irq_in);
> }
>
> cancel_work_sync(&xpad->work);
> +}
> +
> +static void xpad_disconnect(struct usb_interface *intf)
> +{
> + struct usb_xpad *xpad = usb_get_intfdata(intf);
> +
> + xpad_stop_communication(xpad);
> + xpad_deinit_output(xpad);
>
> if (xpad->pad_present)
> xpad_deinit_input(xpad);
> @@ -1447,10 +1453,26 @@ static void xpad_disconnect(struct usb_interface
> *intf)
> usb_set_intfdata(intf, NULL);
> }
>
> +static int xpad_suspend(struct usb_interface *intf, pm_message_t message)
> +{
> + struct usb_xpad *xpad = usb_get_intfdata(intf);
> +
> + xpad_stop_communication(xpad);
> + return 0;
> +}
> +
> +static int xpad_resume(struct usb_interface *intf)
> +{
> + usb_queue_reset_device(intf);
Why do we have to force reset (and tear down the device)? I am sure we
can resume it properly.
Thanks.
> + return 0;
> +}
> +
> static struct usb_driver xpad_driver = {
> .name = "xpad",
> .probe = xpad_probe,
> .disconnect = xpad_disconnect,
> + .suspend = xpad_suspend,
> + .resume = xpad_resume,
> .id_table = xpad_table,
> };
>
> --
> 1.9.1
>
--
Dmitry
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