HID: lenovo-tpkbd: fix leak if tpkbd_probe_tp fails

If tpkbd_probe_tp() bails out, the probe() function return an error,
but hid_hw_stop() is never called.

fixes:
https://bugzilla.redhat.com/show_bug.cgi?id=1003998

Cc: stable@vger.kernel.org
Signed-off-by: Benjamin Tissoires <benjamin.tissoires@redhat.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>

diff --git a/drivers/hid/hid-lenovo-tpkbd.c b/drivers/hid/hid-lenovo-tpkbd.c
index 762d988..31cf29a 100644 (file)
--- a/drivers/hid/hid-lenovo-tpkbd.c
+++ b/drivers/hid/hid-lenovo-tpkbd.c
@@ -414,22 +414,27 @@ static int tpkbd_probe(struct hid_device *hdev,
        ret = hid_parse(hdev);
        if (ret) {
                hid_err(hdev, "hid_parse failed\n");
-               goto err_free;
+               goto err;
        }
 
        ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT);
        if (ret) {
                hid_err(hdev, "hid_hw_start failed\n");
-               goto err_free;
+               goto err;
        }
 
        uhdev = (struct usbhid_device *) hdev->driver_data;
 
-       if (uhdev->ifnum == 1)
-               return tpkbd_probe_tp(hdev);
+       if (uhdev->ifnum == 1) {
+               ret = tpkbd_probe_tp(hdev);
+               if (ret)
+                       goto err_hid;
+       }
 
        return 0;
-err_free:
+err_hid:
+       hid_hw_stop(hdev);
+err:
        return ret;
 }