i2c: xiic: xiic_xfer(): Fix runtime PM leak on error path

[ Upstream commit d663d93bb47e7ab45602b227701022d8aa16040a ]

The xiic_xfer() function gets a runtime PM reference when the function is
entered. This reference is released when the function is exited. There is
currently one error path where the function exits directly, which leads to
a leak of the runtime PM reference.

Make sure that this error path also releases the runtime PM reference.

Fixes: fdacc3c7405d ("i2c: xiic: Switch from waitqueue to completion")
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Reviewed-by: Michal Simek <michal.simek@amd.com>
Signed-off-by: Wolfram Sang <wsa@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/drivers/i2c/busses/i2c-xiic.c b/drivers/i2c/busses/i2c-xiic.c
index bee5a2ef1f229d280d2e55d67267604145f030c6..2bf3713b1969d32371a5ac36a0d336bee77e71a7 100644 (file)
--- a/drivers/i2c/busses/i2c-xiic.c
+++ b/drivers/i2c/busses/i2c-xiic.c
@@ -704,7 +704,7 @@ static int xiic_xfer(struct i2c_adapter *adap, struct i2c_msg *msgs, int num)
        err = xiic_start_xfer(i2c, msgs, num);
        if (err < 0) {
                dev_err(adap->dev.parent, "Error xiic_start_xfer\n");
-               return err;
+               goto out;
        }
 
        err = wait_for_completion_timeout(&i2c->completion, XIIC_XFER_TIMEOUT);
@@ -722,6 +722,8 @@ static int xiic_xfer(struct i2c_adapter *adap, struct i2c_msg *msgs, int num)
                err = (i2c->state == STATE_DONE) ? num : -EIO;
        }
        mutex_unlock(&i2c->lock);
+
+out:
        pm_runtime_mark_last_busy(i2c->dev);
        pm_runtime_put_autosuspend(i2c->dev);
        return err;