gpiolib: Initialize gdev field before is used

gpio_hog depends on gdev field being initialized. This patch fixes an
OOPs during initialization of TI's AM335x-ICEv2.

Fixes: 3edfb7bd76bd1cba ("gpiolib: Show correct direction from the beginning")
Tested-by: Vignesh R <vigneshr@ti.com>
Signed-off-by: Ricardo Ribalda Delgado <ricardo.ribalda@gmail.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

diff --git a/drivers/gpio/gpiolib.c b/drivers/gpio/gpiolib.c
index 76ade1a..1a283fb 100644 (file)
--- a/drivers/gpio/gpiolib.c
+++ b/drivers/gpio/gpiolib.c
@@ -1351,6 +1351,9 @@ int gpiochip_add_data_with_key(struct gpio_chip *chip, void *data,
 
        spin_unlock_irqrestore(&gpio_lock, flags);
 
+       for (i = 0; i < chip->ngpio; i++)
+               gdev->descs[i].gdev = gdev;
+
 #ifdef CONFIG_PINCTRL
        INIT_LIST_HEAD(&gdev->pin_ranges);
 #endif
@@ -1382,8 +1385,6 @@ int gpiochip_add_data_with_key(struct gpio_chip *chip, void *data,
        for (i = 0; i < chip->ngpio; i++) {
                struct gpio_desc *desc = &gdev->descs[i];
 
-               desc->gdev = gdev;
-
                if (chip->get_direction && gpiochip_line_is_valid(chip, i))
                        desc->flags = !chip->get_direction(chip, i) ?
                                        (1 << FLAG_IS_OUT) : 0;