Input: gpio-keys - fix possible NULL pointer dereference

bdata->button is used in gpio_check_button but never initialized.  Having a
device with debounce_interval != 0 without this patch resulted on an oops on
my machine.

Signed-off-by: Uwe Kleine-König <Uwe.Kleine-Koenig@digi.com>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>

1 files changed, 1 insertions, 0 deletions

diff --git a/drivers/input/keyboard/gpio_keys.c b/drivers/input/keyboard/gpio_keys.c
index be58730e636a..1a92f4b04c17 100644
--- a/drivers/input/keyboard/gpio_keys.c
+++ b/drivers/input/keyboard/gpio_keys.c
@@ -118,6 +118,7 @@ static int __devinit gpio_keys_probe(struct platform_device *pdev)
                 unsigned int type = button->type ?: EV_KEY;
 
                 bdata->input = input;
+                bdata->button = button;
                 setup_timer(&bdata->timer,
                             gpio_check_button, (unsigned long)bdata);