Re: 2.5.20 - Xircom PCI Cardbus doesn't work

From: Jeff Garzik (
Date: Fri Jun 14 2002 - 14:37:22 EST

Linus Torvalds wrote:
> On Fri, 14 Jun 2002, Kai Germaschewski wrote:
>>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 ;)
> That might be the right solution - leave "pci_enable_dev()" as-is, and
> just consider that the legacy way of "enable stuff that got allocated
> automatically".
> And make new drivers start using "pci_request_irq()" and friends.
> (The current "pci_enable_dev()" is broken in many respects: sometimes you
> do NOT want to enable the IRQ until you have set up the device, but in
> order to set up the device you may need to know _which_ irq it will have,
> and you need to enable access to memory and IO regions and map the
> device).

Can someone clarify for me the need of pci_request_irq??

pci_enable_device() assigns the IRQ in routing, but it is not enabled
until you call request_irq. I don't see any simplification that can be
done in the PCI API.

The only thing I've wanted is a cross-platform way to detect if
pdev->irq returned by pci_enable_device is valid.


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