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i2c: sprd: fix reference leak when pm_runtime_get_sync fails 

The PM reference count is not expected to be incremented on
return in sprd_i2c_master_xfer() and sprd_i2c_remove().

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: 8b9ec07198 ("i2c: Add Spreadtrum I2C controller driver")
Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: Qinglang Miao <miaoqinglang@huawei.com>
Signed-off-by: Wolfram Sang <wsa@kernel.org>
This commit is contained in:
Qinglang Miao 2020-12-01 17:31:44 +08:00 committed by Wolfram Sang
parent 780f629741
commit 3a4f326463
1 changed files with 2 additions and 2 deletions
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4
drivers/i2c/busses/i2c-sprd.c
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@ -290,7 +290,7 @@ static int sprd_i2c_master_xfer(struct i2c_adapter *i2c_adap,
struct sprd_i2c *i2c_dev = i2c_adap->algo_data;
int im, ret;
ret = pm_runtime_get_sync(i2c_dev->dev);
ret = pm_runtime_resume_and_get(i2c_dev->dev);
if (ret < 0)
return ret;
@ -576,7 +576,7 @@ static int sprd_i2c_remove(struct platform_device *pdev)
struct sprd_i2c *i2c_dev = platform_get_drvdata(pdev);
int ret;
ret = pm_runtime_get_sync(i2c_dev->dev);
ret = pm_runtime_resume_and_get(i2c_dev->dev);
if (ret < 0)
return ret;