On Mon, 7 Jun 2010, Oliver Neukum wrote:
> Am Montag, 7. Juni 2010 18:23:16 schrieb Dmitry Torokhov:
> > On Mon, Jun 07, 2010 at 03:13:42PM +0200, Oliver Neukum wrote:
> > > static int usbtouch_open(struct input_dev *input)
> > > {
> > > struct usbtouch_usb *usbtouch = input_get_drvdata(input);
> > > + int r;
> > >
> > > usbtouch->irq->dev = interface_to_usbdev(usbtouch->interface);
> > >
> > > + r = usb_autopm_get_interface(usbtouch->interface) ? -EIO : 0;
> >
> > Why are we clobbering error code with -EIO? We should propagate te code
> > returned to us (here and below).
>
> usb_autopm_get_interface() uses internal USB error codes which with
> a few exceptions, do not have the meaning error codes in user space
> have.
But other drivers don't do this. What's special about usbtouch?
Alan Stern
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