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path: root/drivers/platform/x86/wmi.c
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Diffstat (limited to 'drivers/platform/x86/wmi.c')
-rw-r--r--drivers/platform/x86/wmi.c43
1 files changed, 18 insertions, 25 deletions
diff --git a/drivers/platform/x86/wmi.c b/drivers/platform/x86/wmi.c
index 1d0b2d6040d1..6ab181dd94ab 100644
--- a/drivers/platform/x86/wmi.c
+++ b/drivers/platform/x86/wmi.c
@@ -1227,40 +1227,33 @@ static int wmi_notify_device(struct device *dev, void *data)
if (!(wblock->gblock.flags & ACPI_WMI_EVENT && wblock->gblock.notify_id == *event))
return 0;
+ /* The ACPI WMI specification says that _WED should be
+ * evaluated every time an notification is received, even
+ * if no consumers are present.
+ *
+ * Some firmware implementations actually depend on this
+ * by using a queue for events which will fill up if the
+ * WMI driver core stops evaluating _WED due to missing
+ * WMI event consumers.
+ */
+ ret = wmi_get_notify_data(wblock, &obj);
+ if (ret < 0)
+ return -EIO;
+
down_read(&wblock->notify_lock);
/* The WMI driver notify handler conflicts with the legacy WMI handler.
* Because of this the WMI driver notify handler takes precedence.
*/
if (wblock->dev.dev.driver && wblock->driver_ready) {
- ret = wmi_get_notify_data(wblock, &obj);
- if (ret >= 0) {
- wmi_notify_driver(wblock, obj);
- kfree(obj);
- }
+ wmi_notify_driver(wblock, obj);
} else {
- if (wblock->handler) {
- wblock->handler(*event, wblock->handler_data);
- } else {
- /* The ACPI WMI specification says that _WED should be
- * evaluated every time an notification is received, even
- * if no consumers are present.
- *
- * Some firmware implementations actually depend on this
- * by using a queue for events which will fill up if the
- * WMI driver core stops evaluating _WED due to missing
- * WMI event consumers.
- *
- * Because of this we need this seemingly useless call to
- * wmi_get_notify_data() which in turn evaluates _WED.
- */
- ret = wmi_get_notify_data(wblock, &obj);
- if (ret >= 0)
- kfree(obj);
- }
-
+ if (wblock->handler)
+ wblock->handler(obj, wblock->handler_data);
}
up_read(&wblock->notify_lock);
+ kfree(obj);
+
acpi_bus_generate_netlink_event("wmi", acpi_dev_name(wblock->acpi_device), *event, 0);
return -EBUSY;