Re: ulpt problem (USB_ERR_IOERROR)

Le Tue, 7 Jul 2009 20:39:26 +0200,
Hans Petter Selasky <hselasky_at_c2i.net> a écrit :

> There was a small bug in my patch. Could you post-patching edit 
> /sys/dev/serial/ulpt.c
> 
> urlpt_open(struct usb_fifo *fifo, int fflags)
> ulpt_open(struct usb_fifo *fifo, int fflags)

Well, as I must use the unlpt device, I think this does not change
anything. 

If I understand well, with /dev/unlpt0, ulpt.c calls unlpt_open(), not
ulpt_open() nor unlpt_open()?

Just in case, I've tried to change unlpt_open() with
static int
unlpt_open(struct usb_fifo *fifo, int fflags)
{
        struct ulpt_softc *sc = usb_fifo_softc(fifo);

        if (sc->sc_fflags & fflags) {
                return (EBUSY);
        }

        /* set defrag write mode */

        if (fflags & FWRITE) {
                printf("unlpt_open: using defrag write mode\n");
                usb_fifo_set_write_defrag(fifo, 1);
        }
...

But the printer hangs after the first job (the data led on the printer
stay on):
unlpt_open: using defrag write mode
ulpt_write_callback:237: state=0x0 actlen=0
ulpt_write_callback:237: state=0x1 actlen=32768
ulpt_write_callback:237: state=0x1 actlen=32768
ulpt_write_callback:237: state=0x1 actlen=32768

Thanks.