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    SubjectRe: [PATCH] pci: keep pci device resource name pointer right.
    Linus Torvalds wrote:
    > On Fri, 17 Apr 2009, Yinghai Lu wrote:
    >> it turns that we need to reget res->name because dev->dev.kobj name is changed
    >> after device_add.
    > Can we not make the rule be that the name should just be set before?
    > IOW, there is something else broken, I think. Rather than put this ugly
    > band-aid, why now make sure that whoever had that broken name fixes it?

    driver core guys are enforcing to use dev_name(device) instead of referring it.

    for pci code:

    via acpi_pci_root_driver.ops.add (aka acpi_pci_root_add) ==> pci_acpi_scan_root is used to scan pci bus/device, and at the same we read the resource for pci_dev at this point still need to use bus->devices to go over all pci_devices if needed.
    in the pci_read_bases, we have res->name = pci_name(pci_dev); pci_name is calling dev_name.

    later via acpi_pci_root_driver.ops.start (aka acpi_pci_root_start) ==> pci_bus_add_device to add all pci_dev in kobj tree.

    pci_bus_add_device will call device_add.

    actually in device_add

    /* first, register with generic layer. */
    error = kobject_add(&dev->kobj, dev->kobj.parent, "%s", dev_name(dev));
    if (error)
    goto Error;

    will get one new name for that kobj, old name is freed.

    Will try to make kobject_add more smart to reuse the old one.


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