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i2c: xiic: fix reference leak when pm_runtime_get_sync fails

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The PM reference count is not expected to be incremented on
return in xiic_xfer and xiic_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: 10b17004a7 ("i2c: xiic: Fix the clocking across bind unbind")
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 17:31:46 +08:00 committed by Wolfram Sang
parent 2c662660ce
commit a85c5c7a3a
1 changed files with 2 additions and 2 deletions
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4
drivers/i2c/busses/i2c-xiic.c
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@ -706,7 +706,7 @@ static int xiic_xfer(struct i2c_adapter *adap, struct i2c_msg *msgs, int num)
dev_dbg(adap->dev.parent, "%s entry SR: 0x%x\n", __func__,
xiic_getreg8(i2c, XIIC_SR_REG_OFFSET));
err = pm_runtime_get_sync(i2c->dev);
err = pm_runtime_resume_and_get(i2c->dev);
if (err < 0)
return err;
@ -873,7 +873,7 @@ static int xiic_i2c_remove(struct platform_device *pdev)
/* remove adapter & data */
i2c_del_adapter(&i2c->adap);
ret = pm_runtime_get_sync(i2c->dev);
ret = pm_runtime_resume_and_get(i2c->dev);
if (ret < 0)
return ret;