[PATCH -next] pinctrl: qcom: spmi-mpp: Fix err handling of pmic_mpp_set_mux

[YueHaibing]

'ret' should be returned while pmic_mpp_write_mode_ctl fails. 

Fixes: 0e948042c420 ("pinctrl: qcom: spmi-mpp: Implement support for sink mode")
Signed-off-by: YueHaibing <yuehaib...@huawei.com>
---
 drivers/pinctrl/qcom/pinctrl-spmi-mpp.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/pinctrl/qcom/pinctrl-spmi-mpp.c 
b/drivers/pinctrl/qcom/pinctrl-spmi-mpp.c
index 98f6f40..d6ddc47 100644
--- a/drivers/pinctrl/qcom/pinctrl-spmi-mpp.c
+++ b/drivers/pinctrl/qcom/pinctrl-spmi-mpp.c
@@ -319,6 +319,8 @@ static int pmic_mpp_set_mux(struct pinctrl_dev *pctldev, 
unsigned function,
        pad->function = function;
 
        ret = pmic_mpp_write_mode_ctl(state, pad);
+       if (ret < 0)
+               return ret;
 
        val = pad->is_enabled << PMIC_MPP_REG_MASTER_EN_SHIFT;