[PATCH 3/4] pinctrl: armada-37xx: Checks for errors in gpio_request_enable callback

[Pali Rohár]

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: 87466ccd9401 ("pinctrl: armada-37xx: Add pin controller support for Armada 37xx")
Signed-off-by: Pali Rohár <pali at kernel.org>
---
 drivers/pinctrl/mvebu/pinctrl-armada-37xx.c | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/drivers/pinctrl/mvebu/pinctrl-armada-37xx.c b/drivers/pinctrl/mvebu/pinctrl-armada-37xx.c
index e5e5f0ea0e77..8978e6c15905 100644
--- a/drivers/pinctrl/mvebu/pinctrl-armada-37xx.c
+++ b/drivers/pinctrl/mvebu/pinctrl-armada-37xx.c
@@ -503,8 +503,11 @@ static int armada_37xx_gpio_request_enable(struct pinctrl_dev *pctldev,
 
 	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;
 }
-- 
2.20.1