[PATCH -next] pinctrl: sh-pfc: Fix missing unlock on error in sh_pfc_func_set_mux()

[Wei Yongjun <weiyongjun1@xxxxxxxxxx>]

Add the missing unlock before return from function sh_pfc_func_set_mux()
in the error handling case.

Fixes: 8a0cc47ccc7c ("pinctrl: sh-pfc: Rollback to mux if required when the gpio is freed")
Signed-off-by: Wei Yongjun <weiyongjun1@xxxxxxxxxx>
---
 drivers/pinctrl/sh-pfc/pinctrl.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/drivers/pinctrl/sh-pfc/pinctrl.c b/drivers/pinctrl/sh-pfc/pinctrl.c
index 99f4ebd69861..212a4a9c3a8f 100644
--- a/drivers/pinctrl/sh-pfc/pinctrl.c
+++ b/drivers/pinctrl/sh-pfc/pinctrl.c
@@ -361,8 +361,10 @@ static int sh_pfc_func_set_mux(struct pinctrl_dev *pctldev, unsigned selector,
 		 * This driver cannot manage both gpio and mux when the gpio
 		 * pin is already enabled. So, this function fails.
 		 */
-		if (cfg->gpio_enabled)
-			return -EBUSY;
+		if (cfg->gpio_enabled) {
+			ret = -EBUSY;
+			goto done;
+		}
 
 		ret = sh_pfc_config_mux(pfc, grp->mux[i], PINMUX_TYPE_FUNCTION);
 		if (ret < 0)