gpiolib: use gpiochip_get_desc() in linehandle_create()

Unduplicate the ngpio check by simply calling gpiochip_get_desc() and
checking its return value.

Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>

diff --git a/drivers/gpio/gpiolib.c b/drivers/gpio/gpiolib.c
index 342c960..166160c 100644 (file)
--- a/drivers/gpio/gpiolib.c
+++ b/drivers/gpio/gpiolib.c
@@ -678,14 +678,13 @@ static int linehandle_create(struct gpio_device *gdev, void __user *ip)
        /* Request each GPIO */
        for (i = 0; i < handlereq.lines; i++) {
                u32 offset = handlereq.lineoffsets[i];
-               struct gpio_desc *desc;
+               struct gpio_desc *desc = gpiochip_get_desc(gdev->chip, offset);
 
-               if (offset >= gdev->ngpio) {
-                       ret = -EINVAL;
+               if (IS_ERR(desc)) {
+                       ret = PTR_ERR(desc);
                        goto out_free_descs;
                }
 
-               desc = &gdev->descs[offset];
                ret = gpiod_request(desc, lh->label);
                if (ret)
                        goto out_free_descs;