Re: [PATCH] parport_pc.c PnP BIOS sanity check

[Gunther Mayer]

Thomas Hood wrote:
> 
> I'm still wondering why this function in parport_pc.c rejects dma
> values of zero.  Is DMA0 not usable by the parallel port for some
> reason?  I should think that if the PnP BIOS returns a dma of zero
> then it means that the parallel port is using DMA0.  Sorry if I'm
> being obtuse.                      // Thomas Hood

1)
  I think I saw some BIOS report DMA0 for "none" (could even have
  been ACPI which is returning PNP formatted legacy resource data).

2)
  I have never seen DMA0 for parport configured by a BIOS.

3)
  Try "lssuperio" if you want the real hardware thing.

This qualifies the code as it is as a sanity check.