staging: android: timed_output: fix use after free of dev

tdev->dev has been freed in device_destroy(), it's not right to
use dev_set_drvdata() after that;

Signed-off-by: Yi Zhang <yizhang@marvell.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/staging/android/timed_output.c b/drivers/staging/android/timed_output.c
index 2c61783..c341ac1 100644 (file)
--- a/drivers/staging/android/timed_output.c
+++ b/drivers/staging/android/timed_output.c
@@ -97,7 +97,6 @@ void timed_output_dev_unregister(struct timed_output_dev *tdev)
 {
        tdev->enable(tdev, 0);
        device_destroy(timed_output_class, MKDEV(0, tdev->index));
-       dev_set_drvdata(tdev->dev, NULL);
 }
 EXPORT_SYMBOL_GPL(timed_output_dev_unregister);