* [PATCH] i2c: stm32f7: Fix runtime PM imbalance in stm32f7_i2c_unreg_slave
@ 2020-05-21 7:08 Dinghao Liu
0 siblings, 0 replies; only message in thread
From: Dinghao Liu @ 2020-05-21 7:08 UTC (permalink / raw)
To: dinghao.liu, kjlu
Cc: Pierre-Yves MORDRET, Maxime Coquelin, Alexandre Torgue,
linux-i2c, linux-stm32, linux-arm-kernel, linux-kernel
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@zju.edu.cn>
---
drivers/i2c/busses/i2c-stm32f7.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/drivers/i2c/busses/i2c-stm32f7.c b/drivers/i2c/busses/i2c-stm32f7.c
index 330ffed011e0..6f5f0fa68385 100644
--- a/drivers/i2c/busses/i2c-stm32f7.c
+++ b/drivers/i2c/busses/i2c-stm32f7.c
@@ -1837,8 +1837,10 @@ static int stm32f7_i2c_unreg_slave(struct i2c_client *slave)
WARN_ON(!i2c_dev->slave[id]);
ret = pm_runtime_get_sync(i2c_dev->dev);
- if (ret < 0)
+ if (ret < 0) {
+ pm_runtime_put_autosuspend(i2c_dev->dev);
return ret;
+ }
if (id == 0) {
mask = STM32F7_I2C_OAR1_OA1EN;
--
2.17.1
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