[PATCH v1] gpiolib: Don't WARN on gpiod_put() for optional GPIO

[Andy Shevchenko <andriy.shevchenko@xxxxxxxxxxxxxxx>]

In case of debug and optional GPIO requested, the gpiod_put() is not aware of
and will WARN, which is not the case.

Make gpiod_put() NULL-aware to keep silent for optional GPIOs.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@xxxxxxxxxxxxxxx>
---
 drivers/gpio/gpiolib.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/gpio/gpiolib.c b/drivers/gpio/gpiolib.c
index 144af0733581..36445e24ee89 100644
--- a/drivers/gpio/gpiolib.c
+++ b/drivers/gpio/gpiolib.c
@@ -4616,7 +4616,8 @@ EXPORT_SYMBOL_GPL(gpiod_get_array_optional);
  */
 void gpiod_put(struct gpio_desc *desc)
 {
-	gpiod_free(desc);
+	if (desc)
+		gpiod_free(desc);
 }
 EXPORT_SYMBOL_GPL(gpiod_put);
 
-- 
2.20.1