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path: root/drivers/input/input.c
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Diffstat (limited to 'drivers/input/input.c')
-rw-r--r--drivers/input/input.c5
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();