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    SubjectRe: [PATCH 4/4] ACPI / PM: Expose lists of device power resources to user space
    Date
    On Wednesday, January 23, 2013 01:17:47 AM Rafael J. Wysocki wrote:
    > On Wednesday, January 23, 2013 01:08:54 AM Rafael J. Wysocki wrote:
    > > On Tuesday, January 22, 2013 03:56:24 PM Greg Kroah-Hartman wrote:
    > > > On Tue, Jan 22, 2013 at 03:28:23AM +0100, Rafael J. Wysocki wrote:
    >
    > [...]
    >
    > > > Oh, and same question about racing userspace, you will have problems
    > > > here in that the symlinks will be showing up after the device is
    > > > created. Perhaps, to make the whole thing easier, you just change the
    > > > acpi core code to hold off on the notification until you get all of
    > > > these links and files set up and then tell userspace. That's probably
    > > > an easier fix.
    > >
    > > I suppose so.
    > >
    > > How can I do that?
    >
    > Should I set dev->kobj.uevent_suppress before calling device_register() and
    > then clear it and call the kobject_uevent(&dev->kobj, KOBJ_ADD) from the ACPI
    > core after device_register() has returned and the files have been created?

    I suppose along the lines of how firmware_class.c uses uevent_suppress?

    Is there any safe mechanism for adding/removing sysfs attributes after
    kobject_uevent(&dev->kobj, KOBJ_ADD) has been called for the given device?

    Rafael


    --
    I speak only for myself.
    Rafael J. Wysocki, Intel Open Source Technology Center.


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