Re: Alpha: virt_to_bus/GFP_DMA problem
Alan Cox (alan@lxorguk.ukuu.org.uk)
Fri, 10 Dec 1999 18:25:18 +0000 (GMT)
> What virt_to_bus() does is to convert the virtual address to an
> address as seen from the PCI bus. The way I read the above code it
> means that memory in the Pyxis box as seen from the PCI bus will
> always be above the 1GB limit. In this case it simply means that you
> are out of luck, yet another broken PCI device, and the driver should
> simply print a warning and exit, without panicing the box.
It will do that just fine providing the GFP_DMA pages are correctly marked.
If there are none then none of them should be added to the lists. Then the
initial allocation fails and the driver refuses to load.
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