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From: Dinghao Liu <dinghao.liu@zju.edu.cn>
To: dinghao.liu@zju.edu.cn, kjlu@umn.edu
Cc: Alessandro Zummo <a.zummo@towertech.it>,
	Alexandre Belloni <alexandre.belloni@bootlin.com>,
	Maxime Ripard <mripard@kernel.org>, Chen-Yu Tsai <wens@csie.org>,
	linux-rtc@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
	linux-kernel@vger.kernel.org
Subject: [PATCH] [v3] rtc: sun6i: Fix memleak in sun6i_rtc_clk_init
Date: Tue, 20 Oct 2020 14:12:26 +0800	[thread overview]
Message-ID: <20201020061226.6572-1-dinghao.liu@zju.edu.cn> (raw)

When clk_hw_register_fixed_rate_with_accuracy() fails,
clk_data should be freed. It's the same for the subsequent
two error paths, but we should also unregister the already
registered clocks in them.

Signed-off-by: Dinghao Liu <dinghao.liu@zju.edu.cn>
---

Changelog:

v2: - Unregister the already registered clocks on failure.

v3: - Add a new label 'err_register' to unify code style.
---
 drivers/rtc/rtc-sun6i.c | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/drivers/rtc/rtc-sun6i.c b/drivers/rtc/rtc-sun6i.c
index e2b8b150bcb4..f2818cdd11d8 100644
--- a/drivers/rtc/rtc-sun6i.c
+++ b/drivers/rtc/rtc-sun6i.c
@@ -272,7 +272,7 @@ static void __init sun6i_rtc_clk_init(struct device_node *node,
 								300000000);
 	if (IS_ERR(rtc->int_osc)) {
 		pr_crit("Couldn't register the internal oscillator\n");
-		return;
+		goto err;
 	}
 
 	parents[0] = clk_hw_get_name(rtc->int_osc);
@@ -290,7 +290,7 @@ static void __init sun6i_rtc_clk_init(struct device_node *node,
 	rtc->losc = clk_register(NULL, &rtc->hw);
 	if (IS_ERR(rtc->losc)) {
 		pr_crit("Couldn't register the LOSC clock\n");
-		return;
+		goto err_register;
 	}
 
 	of_property_read_string_index(node, "clock-output-names", 1,
@@ -301,7 +301,7 @@ static void __init sun6i_rtc_clk_init(struct device_node *node,
 					  &rtc->lock);
 	if (IS_ERR(rtc->ext_losc)) {
 		pr_crit("Couldn't register the LOSC external gate\n");
-		return;
+		goto err_register;
 	}
 
 	clk_data->num = 2;
@@ -314,6 +314,8 @@ static void __init sun6i_rtc_clk_init(struct device_node *node,
 	of_clk_add_hw_provider(node, of_clk_hw_onecell_get, clk_data);
 	return;
 
+err_register:
+	clk_hw_unregister_fixed_rate(rtc->int_osc);
 err:
 	kfree(clk_data);
 }
-- 
2.17.1


WARNING: multiple messages have this Message-ID (diff)
From: Dinghao Liu <dinghao.liu@zju.edu.cn>
To: dinghao.liu@zju.edu.cn, kjlu@umn.edu
Cc: linux-rtc@vger.kernel.org,
	Alessandro Zummo <a.zummo@towertech.it>,
	Alexandre Belloni <alexandre.belloni@bootlin.com>,
	linux-kernel@vger.kernel.org, Maxime Ripard <mripard@kernel.org>,
	Chen-Yu Tsai <wens@csie.org>,
	linux-arm-kernel@lists.infradead.org
Subject: [PATCH] [v3] rtc: sun6i: Fix memleak in sun6i_rtc_clk_init
Date: Tue, 20 Oct 2020 14:12:26 +0800	[thread overview]
Message-ID: <20201020061226.6572-1-dinghao.liu@zju.edu.cn> (raw)

When clk_hw_register_fixed_rate_with_accuracy() fails,
clk_data should be freed. It's the same for the subsequent
two error paths, but we should also unregister the already
registered clocks in them.

Signed-off-by: Dinghao Liu <dinghao.liu@zju.edu.cn>
---

Changelog:

v2: - Unregister the already registered clocks on failure.

v3: - Add a new label 'err_register' to unify code style.
---
 drivers/rtc/rtc-sun6i.c | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/drivers/rtc/rtc-sun6i.c b/drivers/rtc/rtc-sun6i.c
index e2b8b150bcb4..f2818cdd11d8 100644
--- a/drivers/rtc/rtc-sun6i.c
+++ b/drivers/rtc/rtc-sun6i.c
@@ -272,7 +272,7 @@ static void __init sun6i_rtc_clk_init(struct device_node *node,
 								300000000);
 	if (IS_ERR(rtc->int_osc)) {
 		pr_crit("Couldn't register the internal oscillator\n");
-		return;
+		goto err;
 	}
 
 	parents[0] = clk_hw_get_name(rtc->int_osc);
@@ -290,7 +290,7 @@ static void __init sun6i_rtc_clk_init(struct device_node *node,
 	rtc->losc = clk_register(NULL, &rtc->hw);
 	if (IS_ERR(rtc->losc)) {
 		pr_crit("Couldn't register the LOSC clock\n");
-		return;
+		goto err_register;
 	}
 
 	of_property_read_string_index(node, "clock-output-names", 1,
@@ -301,7 +301,7 @@ static void __init sun6i_rtc_clk_init(struct device_node *node,
 					  &rtc->lock);
 	if (IS_ERR(rtc->ext_losc)) {
 		pr_crit("Couldn't register the LOSC external gate\n");
-		return;
+		goto err_register;
 	}
 
 	clk_data->num = 2;
@@ -314,6 +314,8 @@ static void __init sun6i_rtc_clk_init(struct device_node *node,
 	of_clk_add_hw_provider(node, of_clk_hw_onecell_get, clk_data);
 	return;
 
+err_register:
+	clk_hw_unregister_fixed_rate(rtc->int_osc);
 err:
 	kfree(clk_data);
 }
-- 
2.17.1


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             reply	other threads:[~2020-10-20  6:12 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-10-20  6:12 Dinghao Liu [this message]
2020-10-20  6:12 ` [PATCH] [v3] rtc: sun6i: Fix memleak in sun6i_rtc_clk_init Dinghao Liu
2020-10-28 17:44 ` Maxime Ripard
2020-10-28 17:44   ` Maxime Ripard
2020-10-28 17:52 ` Alexandre Belloni
2020-10-28 17:52   ` Alexandre Belloni

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