On Sunday 29 May 2005 10:23, Oliver Neukum wrote:
> Am Sonntag, 29. Mai 2005 15:42 schrieb Giuseppe Bilotta:
> > Hello all,
> > 
> > I have a an Acecad/[EMAIL PROTECTED] graphic tablet. There are drivers for 
> > it 
> > available on the Internet (see for examples 
> > http://acecad.sourceforge.net/ and the pages linked from there, 
> > although the wanadoo.fr page at the top is temporarily unavailable), 
> > but it seems they have not been merged into mainline. Is there a 
> > particular reason for it?
> 
> The author hasn't submitted it.
> 
> While we are at it:
> 
> +static void usb_acecad_close(struct input_dev *dev)
> +{
> +     struct usb_acecad *acecad = dev->private;
> +
> +     if (!--acecad->open)
> +             usb_unlink_urb(acecad->irq);
> +}
> 
> Use usb_kill_urb()

While we are at it the whole deal with using an unprotected counter in
open/close routines is quite racy. There are patches in input tree to
serialize open/close calls and call them only when needed so the counter
is not needed at all.

-- 
Dmitry


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