Re: 2.5.20 - Xircom PCI Cardbus doesn't work

From: Jeff Garzik (
Date: Fri Jun 14 2002 - 14:31:40 EST

Kai Germaschewski wrote:
> On Fri, 14 Jun 2002, Linus Torvalds wrote:
>>I suspect that forcing resource assignment into "pci_enable_device()"
>>should fix that too.
>>Although there should probably be some way for the driver to tell which
>>resources it cares about (some drivers care about the PCI ROM's, for
>>example, others don't. Some drivers don't care about the IO region, and
>>others don't care about the MEM region). So the _right_ answer might be to
>>pass in a bitmap to "pci_enable_device()", which tells the enable code
>>which parts the driver really cares about..
> That reminds me of some idea I had been thinking about for some time:
> What about adding some pci_request_irq() and pci_request_{,mem_}_region,
> which would allow for some cleanup of ever-recurring code sequences in
> drivers, and which at the same time would allow for the above?
> pci_request_mem_region() might even include the ioremap() as well ;)

We already have pci_request_regions() and currently PCI drivers should
use that.

Auto-ioremap would be bad, though... you would wind up wasting address
space for any case where MMIO areas are not 100% utilized (like network
cards that require use of PIO due to hardware bugs, but still export an
MMIO region for their NIC registers)


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