Hi Pingfan,
We have realized the same when implementing lock mechanisms for PCI
hotplug
operations, and we are planning to holding a reference to parent bus for each
pci dev.
Regards!
Gerry
On 08/23/2012 01:24 PM, Liu ping fan wrote:
> Hi,
>
> I have a question about the life cycle of pci_dev and its parent pci_bus.
> In pci_destroy_dev(), we remove the pci_dev from the bus_list, so
> pci_dev is isolated from its parent pci_bus, and their life cycle are
> independent too. But it seems that in pci_dev, we can still access the
> pci_bus from the pointer pci_dev->bus. To resolve such issue, I think
> during the pci_dev removal, there should be process to 1.prevent the
> reader incoming 2. ensure the current reader has exit. But can not
> find them.
>
> Could anyone tell me?
>
> Thanx, pingfan
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