When removing custom query handlers, the handler might still
be used inside the EC query workqueue, causing a kernel oops
if the module holding the callback function was already unloaded.
Fix this by flushing the EC query workqueue when removing
custom query handlers.
Tested on a Acer Travelmate 4002WLMi
Signed-off-by: Armin Wolf <W_Armin@xxxxxx>
---
drivers/acpi/ec.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/drivers/acpi/ec.c b/drivers/acpi/ec.c
index f84905dbd8ca..4ae017391533 100644
--- a/drivers/acpi/ec.c
+++ b/drivers/acpi/ec.c
@@ -1132,6 +1132,7 @@ static void acpi_ec_remove_query_handlers(struct acpi_ec *ec,
void acpi_ec_remove_query_handler(struct acpi_ec *ec, u8 query_bit)
{
acpi_ec_remove_query_handlers(ec, false, query_bit);
+ flush_workqueue(ec_query_wq);
}
EXPORT_SYMBOL_GPL(acpi_ec_remove_query_handler);
--
2.30.2
