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    SubjectRe: Is there a user space pci rescan method?
    Greg KH wrote:
    > On Thu, Sep 23, 2004 at 01:58:32AM +0200, Jan Dittmer wrote:
    >
    >>Dave Aubin wrote:
    >>
    >>>Hi,
    >>>
    >>> I know very little about hotplug, but does make sense.
    >>>How do you motivate a hotplug insertion event? Or should
    >>>I just go read the /docs on hotplugging? Any help is
    >>>Appreciated:)
    >>
    >>There is a "fake" hotplug driver which works for normal pci. But last
    >>time I looked at it, it did only support hot disabling, not hot enabling
    >>- but this surely can be fixed.
    >
    >
    > Yes, hot "enabling" has been left for someone to add to the driver, if
    > you read the comments in it :)
    >

    I read them and started playing around with this driver. So echoing 0 in
    /sys/bus/pci/slots/*/power disables the pci device. The problem I see
    is, that the tree with the device is disappearing. So how am I supposed
    to re-enable the device. I've no real hotplug hardware to play with, so
    I'm bound to reading the source code in drivers/pci/hotplug and testing
    with fakephp. I found your utility pcihpview (v0.5) which searches for
    /sys/bus/pci/hotplug_slots. But grepping the kernel tree doesn't show
    any mentioning of it - so I suppose it is outdated.
    Is there anywhere a current article (or Documentation/pci_hotplug.txt)
    about the state of PCI hotplug and how this is supposed to work?

    Thanks,

    Jan

    ps: Meanwhile I found dummyphp on the pcihpd mailinglist. This doesn't
    remove the device from /sys/bus/pci/slots/*/power . Still I'd like
    to know the offical way.
    -
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