This patch adds null check before actually unregistering the input device
to avoid null pointer exception which leads to kernel panic.
So now, input device drivers won't have to worry about or add null case
condition before calling input_unregister_device() in shutdown and
remove functions.
Signed-off-by: Aniroop Mathur <a.mathur@xxxxxxxxxxx>
---
drivers/input/input.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/drivers/input/input.c b/drivers/input/input.c
index 01fe49e..575219d 100644
--- a/drivers/input/input.c
+++ b/drivers/input/input.c
@@ -2170,6 +2170,9 @@ EXPORT_SYMBOL(input_register_device);
*/
void input_unregister_device(struct input_dev *dev)
{
+ if (!dev)
+ return;
+
if (dev->devres_managed) {
WARN_ON(devres_destroy(dev->dev.parent,
devm_input_device_unregister,
--
1.9.1
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