From: Dinghao Liu <dinghao.liu@zju.edu.cn>
To: dinghao.liu@zju.edu.cn, kjlu@umn.edu
Cc: Pierre-Yves MORDRET <pierre-yves.mordret@st.com>,
Maxime Coquelin <mcoquelin.stm32@gmail.com>,
Alexandre Torgue <alexandre.torgue@st.com>,
linux-i2c@vger.kernel.org,
linux-stm32@st-md-mailman.stormreply.com,
linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org
Subject: [PATCH] i2c: stm32f7: Fix runtime PM imbalance in stm32f7_i2c_unreg_slave
Date: Thu, 21 May 2020 15:08:47 +0800 [thread overview]
Message-ID: <20200521070847.13957-1-dinghao.liu@zju.edu.cn> (raw)
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
reply other threads:[~2020-05-21 7:09 UTC|newest]
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