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authorZhang Rui <rui.zhang@intel.com>2008-08-27 22:05:06 -0400
committerLen Brown <len.brown@intel.com>2008-09-23 23:12:38 -0400
commit19cd847ab24fefe9e50101ec94479e0400a08650 (patch)
tree9af663d1f43e59d6ce3f942d89b910dda5e1c542 /include/acpi
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 'include/acpi')
-rw-r--r--include/acpi/acpiosxf.h3
1 files changed, 3 insertions, 0 deletions
diff --git a/include/acpi/acpiosxf.h b/include/acpi/acpiosxf.h
index 3f93a6b4e17f..b91440ac0d16 100644
--- a/include/acpi/acpiosxf.h
+++ b/include/acpi/acpiosxf.h
@@ -193,6 +193,9 @@ acpi_status
193acpi_os_execute(acpi_execute_type type, 193acpi_os_execute(acpi_execute_type type,
194 acpi_osd_exec_callback function, void *context); 194 acpi_osd_exec_callback function, void *context);
195 195
196acpi_status
197acpi_os_hotplug_execute(acpi_osd_exec_callback function, void *context);
198
196void acpi_os_wait_events_complete(void *context); 199void acpi_os_wait_events_complete(void *context);
197 200
198void acpi_os_sleep(acpi_integer milliseconds); 201void acpi_os_sleep(acpi_integer milliseconds);