Hi Oliver,
On Wed, Nov 25, 2009 at 05:57:16PM +0100, Oliver Neukum wrote:
> Hi,
>
> I need a way to determine whether an input device has been opened.
> A private flag seems wasteful. Is this an acceptable method?
>
Yes, I thhink it is reasonable. I really don't think that adding a
wrapper for input->mutex worth it but I would not oppose adding one
either.
> Regards
> Oliver
>
> +static int usbtouch_resume(struct usb_interface *intf)
> +{
> + struct usbtouch_usb *usbtouch = usb_get_intfdata(intf);
> + struct input_dev *input = usbtouch->input;
> + int result = 0;
> +
> + mutex_lock(&input->mutex);
> + if (input->users)
> + result = usb_submit_urb(usbtouch->irq, GFP_NOIO);
> + mutex_unlock(&input->mutex);
> + return result;
> +}
>
--
Dmitry
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