gpio: exar: switch to a simpler IDA interface

We don't need to specify any ranges when allocating IDs so we can switch
to ida_alloc() and ida_free() instead of the ida_simple_ counterparts.

ida_simple_get(ida, 0, 0, gfp) is equivalent to
ida_alloc_range(ida, 0, UINT_MAX, gfp) which is equivalent to
ida_alloc(ida, gfp). Note: IDR will never actually allocate an ID
larger than INT_MAX.

Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>

Author: brgl

drivers/gpio/gpio-exar.c

@@ -149,7 +149,7 @@ static int gpio_exar_probe(struct platform_device *pdev)
 
 	mutex_init(&exar_gpio->lock);
 
-	index = ida_simple_get(&ida_index, 0, 0, GFP_KERNEL);
+	index = ida_alloc(&ida_index, GFP_KERNEL);
 	if (index < 0) {
 		ret = index;
 		goto err_mutex_destroy;
@@ -179,7 +179,7 @@ static int gpio_exar_probe(struct platform_device *pdev)
 	return 0;
 
 err_destroy:
-	ida_simple_remove(&ida_index, index);
+	ida_free(&ida_index, index);
 err_mutex_destroy:
 	mutex_destroy(&exar_gpio->lock);
 	return ret;
@@ -189,7 +189,7 @@ static int gpio_exar_remove(struct platform_device *pdev)
 {
 	struct exar_gpio_chip *exar_gpio = platform_get_drvdata(pdev);
 
-	ida_simple_remove(&ida_index, exar_gpio->index);
+	ida_free(&ida_index, exar_gpio->index);
 	mutex_destroy(&exar_gpio->lock);
 
 	return 0;