On Thu, 2013-02-21 at 16:52 +0100, Rafael J. Wysocki wrote:
> From: Rafael J. Wysocki <rafael.j.wyso...@intel.com>
:
>
> This update fixes an issue pointed out by Toshi Kani (_OST shouldn't be
> evaluated after successful _EJ0).
>
> Thanks,
> Rafael
>
> ---
> drivers/acpi/scan.c | 272
> ++++++++++++++++++++++++++++++++++++++----------
> include/acpi/acpi_bus.h | 7 +
> 2 files changed, 226 insertions(+), 53 deletions(-)
:
> +static void acpi_scan_bus_device_check(acpi_handle handle, u32 ost_source)
> +{
> + struct acpi_device *device = NULL;
> + u32 ost_code = ACPI_OST_SC_NON_SPECIFIC_FAILURE;
> + int error;
> +
> + mutex_lock(&acpi_scan_lock);
> +
> + acpi_bus_get_device(handle, &device);
> + if (device) {
> + dev_warn(&device->dev, "Attempt to re-insert\n");
> + goto out;
> + }
> + acpi_evaluate_hotplug_ost(handle, ost_source,
> + ACPI_OST_SC_INSERT_IN_PROGRESS, NULL);
> + ost_source = ACPI_OST_EC_OSPM_INSERTION;
Thanks for the update. I confirmed that _OST was handled correctly for
hot-delete. However, I found there is an issue for hot-add too.
ACPI_OST_EC_OSPM_INSERTION is used for _OST when the OS initiated a
hot-add event (which may not happen today). This case, however, is that
hot-add is initiated by FW through an ACPI notification. So, ost_source
must have the ACPI notification event value.
Thanks,
-Toshi
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