On Mon, Oct 27, 2008 at 11:18:43AM +0800, Zhao, Yu wrote:
> Matthew Wilcox wrote:
> >Yes, that's why pci_find_device() is deprecated. But it doesn't also
> >need to be buggy ;-)
>
> How about pci_get_bus_and_slot()? People would meet the problem with it
> anyway.
What problem with it? It's documented to return the device with an
increased refcount, and the implementation appears to do exactly that:
struct pci_dev * pci_get_bus_and_slot(unsigned int bus, unsigned int devfn)
{
struct pci_dev *dev = NULL;
while ((dev = pci_get_device(PCI_ANY_ID, PCI_ANY_ID, dev)) != NULL) {
if (pci_domain_nr(dev->bus) == 0 &&
(dev->bus->number == bus && dev->devfn == devfn))
return dev;
}
return NULL;
}
Are you saying some users of it neglect to decrement the refcount before
disposing of the device?
--
Matthew Wilcox Intel Open Source Technology Centre
"Bill, look, we understand that you're interested in selling us this
operating system, but compare it to ours. We can't possibly take such
a retrograde step."
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