[PATCH] pinctrl: sh-pfc: Make legacy function GPIO handling less fragile

[Geert Uytterhoeven <geert+renesas@xxxxxxxxx>]

If there are no function GPIOs, sh_pfc_register_gpiochip() returns early
with a success indicator.  This is fragile, as new code may be added
after the #ifdef block, which won't be executed in case of early return.

Invert the logic, so the code always continues until the end of the
function on success.

Signed-off-by: Geert Uytterhoeven <geert+renesas@xxxxxxxxx>
---
To be queued in sh-pfc-for-v5.6.

 drivers/pinctrl/sh-pfc/gpio.c | 11 +++++------
 1 file changed, 5 insertions(+), 6 deletions(-)

diff --git a/drivers/pinctrl/sh-pfc/gpio.c b/drivers/pinctrl/sh-pfc/gpio.c
index 5a55b8da7919520e..8213e118aa408573 100644
--- a/drivers/pinctrl/sh-pfc/gpio.c
+++ b/drivers/pinctrl/sh-pfc/gpio.c
@@ -386,12 +386,11 @@ int sh_pfc_register_gpiochip(struct sh_pfc *pfc)
 	}
 
 	/* Register the function GPIOs chip. */
-	if (pfc->info->nr_func_gpios == 0)
-		return 0;
-
-	chip = sh_pfc_add_gpiochip(pfc, gpio_function_setup, NULL);
-	if (IS_ERR(chip))
-		return PTR_ERR(chip);
+	if (pfc->info->nr_func_gpios) {
+		chip = sh_pfc_add_gpiochip(pfc, gpio_function_setup, NULL);
+		if (IS_ERR(chip))
+			return PTR_ERR(chip);
+	}
 #endif /* CONFIG_PINCTRL_SH_FUNC_GPIO */
 
 	return 0;
-- 
2.17.1