i2c: xlr: Fix a resource leak in the error handling path of 'xlr_i2c_probe()'

[ Upstream commit 7f98960c046ee1136e7096aee168eda03aef8a5d ]

A successful 'clk_prepare()' call should be balanced by a corresponding
'clk_unprepare()' call in the error handling path of the probe, as already
done in the remove function.

More specifically, 'clk_prepare_enable()' is used, but 'clk_disable()' is
also already called. So just the unprepare step has still to be done.

Update the error handling path accordingly.

Fixes: 75d31c2372e4 ("i2c: xlr: add support for Sigma Designs controller variant")
Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Signed-off-by: Wolfram Sang <wsa@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/drivers/i2c/busses/i2c-xlr.c b/drivers/i2c/busses/i2c-xlr.c
index 126d139..9ce2065 100644 (file)
--- a/drivers/i2c/busses/i2c-xlr.c
+++ b/drivers/i2c/busses/i2c-xlr.c
@@ -431,11 +431,15 @@ static int xlr_i2c_probe(struct platform_device *pdev)
        i2c_set_adapdata(&priv->adap, priv);
        ret = i2c_add_numbered_adapter(&priv->adap);
        if (ret < 0)
-               return ret;
+               goto err_unprepare_clk;
 
        platform_set_drvdata(pdev, priv);
        dev_info(&priv->adap.dev, "Added I2C Bus.\n");
        return 0;
+
+err_unprepare_clk:
+       clk_unprepare(clk);
+       return ret;
 }
 
 static int xlr_i2c_remove(struct platform_device *pdev)