diff options
Diffstat (limited to 'drivers/input/input.c')
| -rw-r--r-- | drivers/input/input.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/drivers/input/input.c b/drivers/input/input.c index 53a0ddee7872..f1be1a77edf3 100644 --- a/drivers/input/input.c +++ b/drivers/input/input.c @@ -534,8 +534,11 @@ EXPORT_SYMBOL(input_grab_device); static void __input_release_device(struct input_handle *handle) { struct input_dev *dev = handle->dev; + struct input_handle *grabber; - if (dev->grab == handle) { + grabber = rcu_dereference_protected(dev->grab, + lockdep_is_held(&dev->mutex)); + if (grabber == handle) { rcu_assign_pointer(dev->grab, NULL); /* Make sure input_pass_event() notices that grab is gone */ synchronize_rcu(); |