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 > -- > To unsubscribe from this list: send the line "unsubscribe linux-kernel" in > the body of a message to majordomo@xxxxxxxxxxxxxxx > More majordomo info at http://vger.kernel.org/majordomo-info.html > Please read the FAQ at http://www.tux.org/lkml/ > -- To unsubscribe from this list: send the line "unsubscribe linux-pci" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
