regulator: check the return value of gpiod_set_value_cansleep()

gpiod_set_value_cansleep() now returns an integer and can indicate
failures in the GPIO layer. Propagate any potential errors to regulator
core.

Signed-off-by: Bartosz Golaszewski <[e-mail]>
Link: https://patch.msgid.link/[e-mail]
Signed-off-by: Mark Brown <[e-mail]>

drivers/regulator/core.c

···
 static int regulator_ena_gpio_ctrl(struct regulator_dev *rdev, bool enable)
 {
 	struct regulator_enable_gpio *pin = rdev->ena_pin;
+	int ret;
 
 	if (!pin)
 		return -EINVAL;
 
 	if (enable) {
 		/* Enable GPIO at initial use */
-		if (pin->enable_count == 0)
-			gpiod_set_value_cansleep(pin->gpiod, 1);
+		if (pin->enable_count == 0) {
+			ret = gpiod_set_value_cansleep(pin->gpiod, 1);
+			if (ret)
+				return ret;
+		}
 
 		pin->enable_count++;
 	} else {
···
 
 		/* Disable GPIO if not used */
 		if (pin->enable_count <= 1) {
-			gpiod_set_value_cansleep(pin->gpiod, 0);
+			ret = gpiod_set_value_cansleep(pin->gpiod, 0);
+			if (ret)
+				return ret;
+
 			pin->enable_count = 0;
 		}
 	}