Re: unchecked_isa_dma and BusLogic SCSI controller

[Maciej W. Rozycki]

On Thu, 2 Nov 2006, Matthew Wilcox wrote:

> > > It is hard for me to see why BusLogic controller would only do DMA
> > > in low 16MB.  Is there a fix for this?
> > 
> > Does anyone know that controller hardware and its limitations?
> 
> I don't, but:
> 
> 		if (pci_set_dma_mask(PCI_Device, DMA_32BIT_MASK ))
> 			continue;
> 
> So somebody thinks the device can do 32-bit addressing.  I would expect
> that setting unchecked_isa_dma is a historical mistake.  However, I
> don't have any cards of this type to test.

 It could be related to the non-PCI variations of the board.

  Maciej
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