From 5b779fc52020ac6f5beea31c5eafc3d25cf70dc1 Mon Sep 17 00:00:00 2001 From: Benjamin Tissoires Date: Fri, 20 Jan 2017 16:20:11 +0100 Subject: [PATCH] HID: wacom: release the resources before leaving despite devm In the general case, the resources are properly released by devm without needing to do anything. However, when unplugging the wireless receiver, the kernel segfaults from time to time while calling devres_release_all(). I think in that case the resources attempt to access hid_get_drvdata(hdev) which has been set to null while leaving wacom_remove(). Signed-off-by: Benjamin Tissoires Acked-by: Jason Gerecke Signed-off-by: Jiri Kosina --- drivers/hid/wacom_sys.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/hid/wacom_sys.c b/drivers/hid/wacom_sys.c index 8aeca038cc73..0a817e69e029 100644 --- a/drivers/hid/wacom_sys.c +++ b/drivers/hid/wacom_sys.c @@ -2497,6 +2497,8 @@ static void wacom_remove(struct hid_device *hdev) if (hdev->bus == BUS_BLUETOOTH) device_remove_file(&hdev->dev, &dev_attr_speed); + wacom_release_resources(wacom); + hid_set_drvdata(hdev, NULL); }