pinctrl: armada-37xx: Checks for errors in gpio_request_enable callback

Now when all MPP pins are properly defined and every MPP pin has GPIO
function, always checks for errors in armada_37xx_gpio_request_enable()
function when calling armada_37xx_pmx_set_by_name(). Function
armada_37xx_pmx_set_by_name() should not return "not supported" error
anymore for any GPIO pin when requesting GPIO mode.

Fixes: 87466ccd ("pinctrl: armada-37xx: Add pin controller support for Armada 37xx")
Signed-off-by: Pali Rohár <pali@kernel.org>
Link: https://lore.kernel.org/r/20220805122202.23174-3-pali@kernel.orgSigned-off-by: Linus Walleij <linus.walleij@linaro.org>

drivers/pinctrl/mvebu/pinctrl-armada-37xx.c

@@ -500,11 +500,15 @@ static int armada_37xx_gpio_request_enable(struct pinctrl_dev *pctldev,
 	struct armada_37xx_pinctrl *info = pinctrl_dev_get_drvdata(pctldev);
 	struct armada_37xx_pin_group *group;
 	int grp = 0;
+	int ret;
 
 	dev_dbg(info->dev, "requesting gpio %d\n", offset);
 
-	while ((group = armada_37xx_find_next_grp_by_pin(info, offset, &grp)))
-		armada_37xx_pmx_set_by_name(pctldev, "gpio", group);
+	while ((group = armada_37xx_find_next_grp_by_pin(info, offset, &grp))) {
+		ret = armada_37xx_pmx_set_by_name(pctldev, "gpio", group);
+		if (ret)
+			return ret;
+	}
 
 	return 0;
 }