linux-kernel - [PATCH] clk: si5351: implement remove handler

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Date:   Sat, 16 Sep 2017 01:30:30 +0300
From:   Alexey Khoroshilov <khoroshilov@...ras.ru>
To:     Sebastian Hesselbarth <sebastian.hesselbarth@...il.com>,
        Stephen Boyd <sboyd@...eaurora.org>
Cc:     Alexey Khoroshilov <khoroshilov@...ras.ru>,
        Michael Turquette <mturquette@...libre.com>,
        linux-clk@...r.kernel.org, linux-kernel@...r.kernel.org,
        ldv-project@...uxtesting.org
Subject: [PATCH] clk: si5351: implement remove handler

The driver has no remove function, so it does not cleanup
resources that are not under devm management.

Found by Linux Driver Verification project (linuxtesting.org).

Signed-off-by: Alexey Khoroshilov <khoroshilov@...ras.ru>
---
 drivers/clk/clk-si5351.c | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/drivers/clk/clk-si5351.c b/drivers/clk/clk-si5351.c
index 20d90769cced..36a15f161dfd 100644
--- a/drivers/clk/clk-si5351.c
+++ b/drivers/clk/clk-si5351.c
@@ -1619,6 +1619,18 @@ static int si5351_i2c_probe(struct i2c_client *client,
 	return ret;
 }
 
+static int si5351_i2c_remove(struct i2c_client *client)
+{
+	struct si5351_driver_data *drvdata = i2c_get_clientdata(client);
+
+	of_clk_del_provider(client->dev.of_node);
+	if (!IS_ERR(drvdata->pxtal))
+		clk_disable_unprepare(drvdata->pxtal);
+	if (!IS_ERR(drvdata->pclkin))
+		clk_disable_unprepare(drvdata->pclkin);
+	return 0;
+}
+
 static const struct i2c_device_id si5351_i2c_ids[] = {
 	{ "si5351a", SI5351_VARIANT_A },
 	{ "si5351a-msop", SI5351_VARIANT_A3 },
@@ -1634,6 +1646,7 @@ static struct i2c_driver si5351_driver = {
 		.of_match_table = of_match_ptr(si5351_dt_ids),
 	},
 	.probe = si5351_i2c_probe,
+	.remove = si5351_i2c_remove,
 	.id_table = si5351_i2c_ids,
 };
 module_i2c_driver(si5351_driver);
-- 
2.7.4