Input: gpio_keys - fix warning regarding uninitialized 'button' variable

Commit af906faabcf91eb1 ("Input: gpio_keys - fix warning regarding uninitialized
'irq' variable") introduced the following build warning:

drivers/input/keyboard/gpio_keys.c:625:16: warning: 'button' may be used uninitialized in this function [-Wmaybe-uninitialized]

Move the 'button' initialization to a proper location to avoid such warning.

Reported-by: Olof's autobuilder <build@lixom.net>
Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>

1 files changed, 3 insertions, 2 deletions

diff --git a/drivers/input/keyboard/gpio_keys.c b/drivers/input/keyboard/gpio_keys.c
index b8b4876ac8d3..f44f05b70ee0 100644
--- a/drivers/input/keyboard/gpio_keys.c
+++ b/drivers/input/keyboard/gpio_keys.c
@@ -621,9 +621,12 @@ gpio_keys_get_devtree_pdata(struct device *dev)
                 int gpio = -1;
                 enum of_gpio_flags flags;
 
+                button = &pdata->buttons[i++];
+
                 if (!of_find_property(pp, "gpios", NULL)) {
                         button->irq = irq_of_parse_and_map(pp, 0);
                         if (button->irq == 0) {
+                                i--;
                                 pdata->nbuttons--;
                                 dev_warn(dev, "Found button without gpios or irqs\n");
                                 continue;
@@ -640,8 +643,6 @@ gpio_keys_get_devtree_pdata(struct device *dev)
                         }
                 }
 
-                button = &pdata->buttons[i++];
-
                 button->gpio = gpio;
                 button->active_low = flags & OF_GPIO_ACTIVE_LOW;