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    SubjectRe: [PATCH 15/16 v6] PCI: document the SR-IOV sysfs entries
    Greg KH wrote:
    > On Wed, Nov 05, 2008 at 08:33:18PM -0800, Greg KH wrote:
    >> On Wed, Oct 22, 2008 at 04:45:15PM +0800, Yu Zhao wrote:
    >>> Documentation/ABI/testing/sysfs-bus-pci | 33 +++++++++++++++++++++++++++++++
    >>> 1 files changed, 33 insertions(+), 0 deletions(-)
    >>> diff --git a/Documentation/ABI/testing/sysfs-bus-pci b/Documentation/ABI/testing/sysfs-bus-pci
    >>> index ceddcff..41cce8f 100644
    >>> --- a/Documentation/ABI/testing/sysfs-bus-pci
    >>> +++ b/Documentation/ABI/testing/sysfs-bus-pci
    >>> @@ -9,3 +9,36 @@ Description:
    >>> that some devices may have malformatted data. If the
    >>> underlying VPD has a writable section then the
    >>> corresponding section of this file will be writable.
    >>> +
    >>> +What: /sys/bus/pci/devices/.../iov/enable
    >> Are you sure this is still the correct location with your change to
    >> struct device?
    > Nevermind, this is correct.
    > But the bigger problem is that userspace doesn't know when these
    > attributes show up. So tools like udev and HAL and others can't look
    > for them as they never get notified, and they don't even know if they
    > should be looking for them or not.
    > Is there any way to tie these attributes to the "main" pci device so
    > that they get created before the device is announced to the world?
    > Doing that would solve this issue.
    > thanks,
    > greg k-h

    Currently PCI subsystem has /sys/.../{vendor,device,...} bundled to the
    main PCI device (I suppose this means the entries are created by

    And after the PCI device is announced,
    /sys/.../{config,resourceX,rom,vpd,iov,...} get created depending on if
    these features are supported.

    Making dynamic entries tie to the main PCI device would require PCI
    subsystem to allocate different 'bus_type' for the devices, right?


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