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authorZhang Rui <rui.zhang@intel.com>2008-08-28 10:05:06 +0800
committerLen Brown <len.brown@intel.com>2008-09-23 23:12:38 -0400
commit19cd847ab24fefe9e50101ec94479e0400a08650 (patch)
tree9af663d1f43e59d6ce3f942d89b910dda5e1c542 /drivers/ata
parent6bd00a61ab63d4ceb635ae0316353c11c900b8d8 (diff)
ACPI: fix hotplug race
The hotplug notification handler and drivers' notification handler all run 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. So now we run run hotplug in another workqueue and wait for all acpi notication handlers finish. This was 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> Signed-off-by: Len Brown <len.brown@intel.com>
Diffstat (limited to 'drivers/ata')
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