gpio: cdev: don't access gdev->chip if it's not needed

The variable holding the number of GPIO lines is duplicated in GPIO
device so read it instead of unnecessarily dereferencing the chip
pointer.

Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Acked-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>

diff --git a/drivers/gpio/gpiolib-cdev.c b/drivers/gpio/gpiolib-cdev.c
index 8e37e3befa084080d8f455ec82b29f34d7a8781f..e993c6a7215af4f4d888e923ce8a195b648b93e5 100644 (file)
--- a/drivers/gpio/gpiolib-cdev.c
+++ b/drivers/gpio/gpiolib-cdev.c
@@ -2701,7 +2701,7 @@ static int gpio_chrdev_open(struct inode *inode, struct file *file)
        if (!cdev)
                return -ENODEV;
 
-       cdev->watched_lines = bitmap_zalloc(gdev->chip->ngpio, GFP_KERNEL);
+       cdev->watched_lines = bitmap_zalloc(gdev->ngpio, GFP_KERNEL);
        if (!cdev->watched_lines)
                goto out_free_cdev;