Commit 23ceb846 authored by Qinglang Miao's avatar Qinglang Miao Committed by Wolfram Sang

i2c: cadence: fix reference leak when pm_runtime_get_sync fails

The PM reference count is not expected to be incremented on
return in functions cdns_i2c_master_xfer and cdns_reg_slave.

However, pm_runtime_get_sync will increment pm usage counter
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: 7fa32329 ("i2c: cadence: Move to sensible power management")
Reported-by: default avatarHulk Robot <hulkci@huawei.com>
Signed-off-by: default avatarQinglang Miao <miaoqinglang@huawei.com>
Signed-off-by: default avatarWolfram Sang <wsa@kernel.org>
parent d5c1d606
......@@ -789,7 +789,7 @@ static int cdns_i2c_master_xfer(struct i2c_adapter *adap, struct i2c_msg *msgs,
bool change_role = false;
#endif
ret = pm_runtime_get_sync(id->dev);
ret = pm_runtime_resume_and_get(id->dev);
if (ret < 0)
return ret;
......@@ -911,7 +911,7 @@ static int cdns_reg_slave(struct i2c_client *slave)
if (slave->flags & I2C_CLIENT_TEN)
return -EAFNOSUPPORT;
ret = pm_runtime_get_sync(id->dev);
ret = pm_runtime_resume_and_get(id->dev);
if (ret < 0)
return ret;
......
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