[PATCH v3 3/8] gpiolib: of: return -ENOENT from of_gpio_count() stub

[Dmitry Torokhov]

gpiod_count() and its firmware backends are expected to return either a
positive number of GPIOs or a negative error code (-ENOENT) when no
GPIOs are assigned. However, the !CONFIG_OF_GPIO stub for
of_gpio_count() returns 0 instead of -ENOENT. This causes gpiod_count()
to skip the platform_gpio_count() fallback (which triggers when
count < 0) and erroneously return 0 to callers.

Change the stub to return -ENOENT to match the real of_gpio_count()
implementation and the other error-returning stubs in gpiolib-of.h.

Fixes: f626d6dfb709 ("gpio: of: Break out OF-only code")
Reviewed-by: Andy Shevchenko <andriy.shevchenko@xxxxxxxxx>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@xxxxxxxxx>
---
 drivers/gpio/gpiolib-of.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpio/gpiolib-of.h b/drivers/gpio/gpiolib-of.h
index 218cfe5bc4ac..9ca540d93f93 100644
--- a/drivers/gpio/gpiolib-of.h
+++ b/drivers/gpio/gpiolib-of.h
@@ -46,7 +46,7 @@ static inline bool of_gpiochip_instance_match(struct gpio_chip *gc,
 static inline int of_gpio_count(const struct fwnode_handle *fwnode,
 				const char *con_id)
 {
-	return 0;
+	return -ENOENT;
 }
 static inline int of_gpiochip_get_lflags(struct gpio_chip *chip,
 					 struct fwnode_reference_args *gpiospec,

-- 
2.56.0.506.g506a7eabc5-goog