From: Qinglang Miao miaoqinglang@huawei.com
[ Upstream commit 2c662660ce2bd3b09dae21a9a9ac9395e1e6c00b ]
The PM reference count is not expected to be incremented on return in these stm32f7_i2c_xx serious functions.
However, pm_runtime_get_sync will increment the PM reference count even failed. Forgetting to putting operation will result in a reference leak here.
Replace it with pm_runtime_resume_and_get to keep usage counter balanced.
Fixes: ea6dd25deeb5 ("i2c: stm32f7: add PM_SLEEP suspend/resume support") Reported-by: Hulk Robot hulkci@huawei.com Signed-off-by: Qinglang Miao miaoqinglang@huawei.com Signed-off-by: Wolfram Sang wsa@kernel.org Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/i2c/busses/i2c-stm32f7.c | 12 ++++++------ 1 file changed, 6 insertions(+), 6 deletions(-)
diff --git a/drivers/i2c/busses/i2c-stm32f7.c b/drivers/i2c/busses/i2c-stm32f7.c index 473fbe144b7e..8e2c65f91a67 100644 --- a/drivers/i2c/busses/i2c-stm32f7.c +++ b/drivers/i2c/busses/i2c-stm32f7.c @@ -1652,7 +1652,7 @@ static int stm32f7_i2c_xfer(struct i2c_adapter *i2c_adap, i2c_dev->msg_id = 0; f7_msg->smbus = false;
- ret = pm_runtime_get_sync(i2c_dev->dev); + ret = pm_runtime_resume_and_get(i2c_dev->dev); if (ret < 0) return ret;
@@ -1698,7 +1698,7 @@ static int stm32f7_i2c_smbus_xfer(struct i2c_adapter *adapter, u16 addr, f7_msg->read_write = read_write; f7_msg->smbus = true;
- ret = pm_runtime_get_sync(dev); + ret = pm_runtime_resume_and_get(dev); if (ret < 0) return ret;
@@ -1799,7 +1799,7 @@ static int stm32f7_i2c_reg_slave(struct i2c_client *slave) if (ret) return ret;
- ret = pm_runtime_get_sync(dev); + ret = pm_runtime_resume_and_get(dev); if (ret < 0) return ret;
@@ -1880,7 +1880,7 @@ static int stm32f7_i2c_unreg_slave(struct i2c_client *slave)
WARN_ON(!i2c_dev->slave[id]);
- ret = pm_runtime_get_sync(i2c_dev->dev); + ret = pm_runtime_resume_and_get(i2c_dev->dev); if (ret < 0) return ret;
@@ -2277,7 +2277,7 @@ static int stm32f7_i2c_regs_backup(struct stm32f7_i2c_dev *i2c_dev) int ret; struct stm32f7_i2c_regs *backup_regs = &i2c_dev->backup_regs;
- ret = pm_runtime_get_sync(i2c_dev->dev); + ret = pm_runtime_resume_and_get(i2c_dev->dev); if (ret < 0) return ret;
@@ -2299,7 +2299,7 @@ static int stm32f7_i2c_regs_restore(struct stm32f7_i2c_dev *i2c_dev) int ret; struct stm32f7_i2c_regs *backup_regs = &i2c_dev->backup_regs;
- ret = pm_runtime_get_sync(i2c_dev->dev); + ret = pm_runtime_resume_and_get(i2c_dev->dev); if (ret < 0) return ret;