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    SubjectRe: [PATCH] 2.5.5-pre1 IDE cleanup 9


    On Fri, 22 Feb 2002, Jeff Garzik wrote:

    > Gérard Roudier wrote:
    > > Basically at the moment, if the driver allows upper 'seeming cleaner and
    > > smarter' PCI probing things to deal with the HBA attachment order, at
    > > least all my machines running Linux will not even reboot.
    > >
    > > Being smart is doing what user expects, here.
    >
    > Oh come on, how hard is the following?
    >
    > > static int __init foo_init(void)
    > > {
    > > int rc = pci_module_init(&sym2_pci_driver);
    > > if (rc) return rc;
    > > do_deferred_work();
    > > }
    > > module_init(foo_init);
    >
    > You have tons of flexibility you are ignoring here... For the
    > non-hotplug hosts (ie. present at boot), just use pci_driver::probe to
    > register hosts on a list, and little other work. do_deferred_work()
    > handles the list in a manner that ensures proper boot and/or host
    > ordering.
    >
    > So for non-hotplug hosts you do a init_module time:
    > register N hosts with PCI API
    > register N hosts with SCSI API
    >
    > And hotplugged hosts would do the same, with N==1.
    >
    > What you describe -is- supported with the PCI API.

    At the time I investigated the API it just mixed the probing and the
    registering by performing some auto-registration based on return value.
    May-be the API did evolve since that time or I missed something important.

    For now I will be in vacation for 1 week. I will re-investigate this when
    I will be back.

    Thanks,
    Gérard.

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