Input: rotary-encoder - defer calls gpio_to_irq()

Don't call gpio_to_irq() on GPIOs before gpio_request() succeeded on
them. This avoids Ooopses with incorrect DT bindings.

Signed-off-by: Daniel Mack <zonque@gmail.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>

drivers/input/misc/rotary_encoder.c

@@ -163,8 +163,6 @@ static int __devinit rotary_encoder_probe(struct platform_device *pdev)
 
 	encoder->input = input;
 	encoder->pdata = pdata;
-	encoder->irq_a = gpio_to_irq(pdata->gpio_a);
-	encoder->irq_b = gpio_to_irq(pdata->gpio_b);
 
 	/* create and register the input driver */
 	input->name = pdev->name;
@@ -215,6 +213,9 @@ static int __devinit rotary_encoder_probe(struct platform_device *pdev)
 		goto exit_free_gpio_a;
 	}
 
+	encoder->irq_a = gpio_to_irq(pdata->gpio_a);
+	encoder->irq_b = gpio_to_irq(pdata->gpio_b);
+
 	/* request the IRQs */
 	if (pdata->half_period) {
 		handler = &rotary_encoder_half_period_irq;