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Message-ID: <539EC2A1.6040803@selasky.org>
Date: Mon, 16 Jun 2014 12:10:41 +0200
From: Hans Petter Selasky <hps@selasky.org>
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To: Matthias Apitz <guru@unixarea.de>
Subject: Re: Fwd: USB to parallel for printer HP LaserJet 4mL
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On 06/16/14 12:07, Matthias Apitz wrote:
> El día Monday, June 16, 2014 a las 11:39:23AM +0200, Hans Petter Selasky escribió:
>
>> Try to comment out starting of bulk read transfers:
>>
>> static void
>> ulpt_start_read(struct usb_fifo *fifo)
>> {
>> #if 0
>>           struct ulpt_softc *sc = usb_fifo_softc(fifo);
>>
>>           usbd_transfer_start(sc->sc_xfer[ULPT_BULK_DT_RD]);
>> #endif
>> }
>
> Hi,
>
> The code is now:
>
> static void
> ulpt_start_read(struct usb_fifo *fifo)
> {
>          DPRINTF("debugging ulpt.c: %s\n", "ulpt_start_read() skiped ULPT_BULK_DT_RD");
> #if 0
>          struct ulpt_softc *sc = usb_fifo_softc(fifo);
>
>          usbd_transfer_start(sc->sc_xfer[ULPT_BULK_DT_RD]);
> #endif
> }
>
> but it seems that ulpt_start_read() is never called:

What happens if you revert that patch, and do a read first, instead of a 
write?

--HPS