Is there any way you could open the port from kernel space as though you
were in user space and just write to it without taking exclusive
control?
Trevor Astrope <astrope at tabbweb.com> wrote:
> I'm pretty sure this is also the code that fails with a pci express
> serial card if you define the irq and i/o port in the kernel serial.h
> header with earlier kernels.
>
> On Sat, 26 Jun 2010, Chris Brannon wrote:
>
> > Apparently, what we have isn't working for some people, as of the 2.6.34
> > kernel.
> > Here's the piece of code from src/serialio.c which is failing:
> >
> > if (synth_request_region(ser->port, 8)) {
> > /* try to take it back. */
> > printk("Ports not available, trying to steal them\n");
> > __release_region(&ioport_resource, ser->port, 8);
> > if (synth_request_region(ser->port, 8))
> > return NULL;
> > }
> >
> > -- Chris
> > _______________________________________________
> > Speakup mailing list
> > Speakup at braille.uwo.ca
> > http://speech.braille.uwo.ca/mailman/listinfo/speakup
> >
> _______________________________________________
> Speakup mailing list
> Speakup at braille.uwo.ca
> http://speech.braille.uwo.ca/mailman/listinfo/speakup
--
Your life is like a penny. You're going to lose it. The question is:
How do
you spend it?
John Covici
covici at ccs.covici.com
