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authorRonald Tschalär <ronald@innovation.ch>2018-09-30 19:53:13 -0700
committerRafael J. Wysocki <rafael.j.wysocki@intel.com>2018-10-08 08:41:35 +0200
commit757c968c442397f1249bb775a7c8c03842e3e0c7 (patch)
tree5dc9c6441bf396b22e125e8e901c9a4bd7598205 /drivers/acpi/osl.c
parentca1721c5bee77105829cbd7baab8ee0eab85b06d (diff)
ACPI / SBS: Fix rare oops when removing modules
There was a small race when removing the sbshc module where smbus_alarm() had queued acpi_smbus_callback() for deferred execution but it hadn't been run yet, so that when it did run hc had been freed and the module unloaded, resulting in an invalid paging request. A similar race existed when removing the sbs module with regards to acpi_sbs_callback() (which is called from acpi_smbus_callback()). We therefore need to ensure no callbacks are pending or executing before the cleanups are done and the modules are removed. Signed-off-by: Ronald Tschalär <ronald@innovation.ch> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'drivers/acpi/osl.c')
-rw-r--r--drivers/acpi/osl.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/acpi/osl.c b/drivers/acpi/osl.c
index 8df9abfa947b..9d139727f164 100644
--- a/drivers/acpi/osl.c
+++ b/drivers/acpi/osl.c
@@ -1129,6 +1129,7 @@ void acpi_os_wait_events_complete(void)
flush_workqueue(kacpid_wq);
flush_workqueue(kacpi_notify_wq);
}
+EXPORT_SYMBOL(acpi_os_wait_events_complete);
struct acpi_hp_work {
struct work_struct work;