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 alsoHow about pci_get_bus_and_slot()? People would meet the problem with it anyway.
need to be buggy ;-)
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?