[PATCH 4.9 043/141] pinctrl: qcom: spmi-mpp: Fix err handling of pmic_mpp_set_mux

[Greg Kroah-Hartman]

4.9-stable review patch.  If anyone has any objections, please let me know.

------------------

From: YueHaibing <yuehaib...@huawei.com>

[ Upstream commit 69f8455f6cc78fa6cdf80d0105d7a748106271dc ]

'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>
Signed-off-by: Linus Walleij <linus.wall...@linaro.org>
Signed-off-by: Sasha Levin <sas...@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gre...@linuxfoundation.org>
---
 drivers/pinctrl/qcom/pinctrl-spmi-mpp.c |    2 ++
 1 file changed, 2 insertions(+)

--- 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 pinct
        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;