On Fri, Aug 24, 2012 at 10:30 PM, Jiang Liu <liu...@gmail.com> wrote: > 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.
Thanks! You save me from searching such codes. Regards, pingfan > 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 majord...@vger.kernel.org >> 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-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
