Re: [PATCH 5/8] fix hotplug race

[Tejun Heo <htejun@gmail.com>]

Shaohua Li wrote:
> hotplug notification handler and drivers' notification handler are all
> running in one workqueue. Before hotplug removes an acpi device, the
> device driver's notification handler is already be recorded to run just
> after global notification handler. After hotplug notification handler
> runs, acpica will notice a NULL notification handler and crash. This
> patch runs hotplug in other workqueue and wait for all acpi notication
> handlers finish. This is found in battery hotplug, but actually all
> hotplug can be affected.
> 
> Signed-off-by: Zhang Rui <rui.zhang@intel.com>
> Signed-off-by: Shaohua Li <shaohua.li@intel.com> 
> ---
>  drivers/acpi/dock.c     |   24 +++++++++++++++++++++++-
>  drivers/acpi/osl.c      |   44 +++++++++++++++++++++++++++++++++++++++-----
>  include/acpi/acpiosxf.h |    3 +++
>  3 files changed, 65 insertions(+), 6 deletions(-)

I don't understand the ACPI/dock specific changes but libata-acpi
definitely looks much prettier this way.  Holger, does everything look okay?

-- 
tejun