[PATCH] gpiolib: Preserve desc->flags when setting state

[Chris Packham]

desc->flags may already have values set by of_gpiochip_add() so make
sure that this isn't undone when setting the initial direction.

Fixes: 3edfb7bd76bd1cba ("gpiolib: Show correct direction from the beginning")
Signed-off-by: Chris Packham <chris.pack...@alliedtelesis.co.nz>
---
 drivers/gpio/gpiolib.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/drivers/gpio/gpiolib.c b/drivers/gpio/gpiolib.c
index e013d417a936..cc651e3dea54 100644
--- a/drivers/gpio/gpiolib.c
+++ b/drivers/gpio/gpiolib.c
@@ -1393,11 +1393,11 @@ int gpiochip_add_data_with_key(struct gpio_chip *chip, 
void *data,
                struct gpio_desc *desc = &gdev->descs[i];
 
                if (chip->get_direction && gpiochip_line_is_valid(chip, i))
-                       desc->flags = !chip->get_direction(chip, i) ?
-                                       (1 << FLAG_IS_OUT) : 0;
+                       if (!chip->get_direction(chip, i))
+                               set_bit(FLAG_IS_OUT, &desc->flags);
                else
-                       desc->flags = !chip->direction_input ?
-                                       (1 << FLAG_IS_OUT) : 0;
+                       if (!chip->direction_input)
+                               set_bit(FLAG_IS_OUT, &desc->flags);
        }
 
        acpi_gpiochip_add(chip);
-- 
2.22.0