[PATCH] i2c: busses: Fix a reference count leak.

[wu000273]

From: Qiushi Wu <wu000...@umn.edu>

pm_runtime_get_sync() increments the runtime PM usage counter even
when it returns an error code. Thus call pm_runtime_put_noidle()
if pm_runtime_get_sync() fails.

Fixes: 13d6eb20fc79 ("i2c: imx-lpi2c: add runtime pm support")
Signed-off-by: Qiushi Wu <wu000...@umn.edu>
---
 drivers/i2c/busses/i2c-imx-lpi2c.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/i2c/busses/i2c-imx-lpi2c.c 
b/drivers/i2c/busses/i2c-imx-lpi2c.c
index 9db6ccded5e9..85b9c1fc7681 100644
--- a/drivers/i2c/busses/i2c-imx-lpi2c.c
+++ b/drivers/i2c/busses/i2c-imx-lpi2c.c
@@ -260,8 +260,10 @@ static int lpi2c_imx_master_enable(struct lpi2c_imx_struct 
*lpi2c_imx)
        int ret;
 
        ret = pm_runtime_get_sync(lpi2c_imx->adapter.dev.parent);
-       if (ret < 0)
+       if (ret < 0) {
+               pm_runtime_put_noidle(lpi2c_imx->adapter.dev.parent);
                return ret;
+       }
 
        temp = MCR_RST;
        writel(temp, lpi2c_imx->base + LPI2C_MCR);
-- 
2.17.1