[PATCH] i2c: imx-lpi2c: fix runtime pm imbalance on error

From: Dinghao Liu
Date: Wed May 20 2020 - 09:46:46 EST


pm_runtime_get_sync() increments the runtime PM usage counter even
the call returns an error code. Thus a pairing decrement is needed
on the error handling path to keep the counter balanced.

Signed-off-by: Dinghao Liu <dinghao.liu@xxxxxxxxxx>
---
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 94743ba581fe..89908c24c8b3 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_autosuspend(lpi2c_imx->adapter.dev.parent);
return ret;
+ }

temp = MCR_RST;
writel(temp, lpi2c_imx->base + LPI2C_MCR);
--
2.17.1