linux-kernel - [PATCH 2/2] clk: meson: use devm_of_clk_add_hw

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:   Thu, 18 Jan 2018 13:08:31 +0100
From:   Jerome Brunet <jbrunet@...libre.com>
To:     Neil Armstrong <narmstrong@...libre.com>
Cc:     Jerome Brunet <jbrunet@...libre.com>,
        Kevin Hilman <khilman@...libre.com>,
        Carlo Caione <carlo@...one.org>,
        Michael Turquette <mturquette@...libre.com>,
        Stephen Boyd <sboyd@...eaurora.org>,
        linux-amlogic@...ts.infradead.org, linux-clk@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH 2/2] clk: meson: use devm_of_clk_add_hw_provider

There is no remove callbacks in meson's clock controllers and
of_clk_del_provider is never called if of_clk_add_hw_provider has been
executed, introducing a potential memory leak.
Fixing this by the using the devm variant.

In reality, the leak would never happen since these controllers are
never unloaded once in use ... still, this is worth cleaning.

Signed-off-by: Jerome Brunet <jbrunet@...libre.com>
---
 drivers/clk/meson/axg.c     | 4 ++--
 drivers/clk/meson/gxbb.c    | 5 +++--
 drivers/clk/meson/meson8b.c | 4 ++--
 3 files changed, 7 insertions(+), 6 deletions(-)

diff --git a/drivers/clk/meson/axg.c b/drivers/clk/meson/axg.c
index 87aba8e871a0..02f4401d7bc3 100644
--- a/drivers/clk/meson/axg.c
+++ b/drivers/clk/meson/axg.c
@@ -923,8 +923,8 @@ static int axg_clkc_probe(struct platform_device *pdev)
 		}
 	}
 
-	return of_clk_add_hw_provider(dev->of_node, of_clk_hw_onecell_get,
-			clkc_data->hw_onecell_data);
+	return devm_of_clk_add_hw_provider(dev, of_clk_hw_onecell_get,
+					   clkc_data->hw_onecell_data);
 }
 
 static struct platform_driver axg_driver = {
diff --git a/drivers/clk/meson/gxbb.c b/drivers/clk/meson/gxbb.c
index ba1023983d79..472a3cfbfbc5 100644
--- a/drivers/clk/meson/gxbb.c
+++ b/drivers/clk/meson/gxbb.c
@@ -2028,8 +2028,9 @@ static int gxbb_clkc_probe(struct platform_device *pdev)
 			goto iounmap;
 	}
 
-	return of_clk_add_hw_provider(dev->of_node, of_clk_hw_onecell_get,
-			clkc_data->hw_onecell_data);
+
+	return devm_of_clk_add_hw_provider(dev, of_clk_hw_onecell_get,
+					   clkc_data->hw_onecell_data);
 
 iounmap:
 	iounmap(clk_base);
diff --git a/drivers/clk/meson/meson8b.c b/drivers/clk/meson/meson8b.c
index 3ffea80c1308..abac079ff77f 100644
--- a/drivers/clk/meson/meson8b.c
+++ b/drivers/clk/meson/meson8b.c
@@ -878,8 +878,8 @@ static int meson8b_clkc_probe(struct platform_device *pdev)
 		return ret;
 	}
 
-	return of_clk_add_hw_provider(dev->of_node, of_clk_hw_onecell_get,
-			&meson8b_hw_onecell_data);
+	return devm_of_clk_add_hw_provider(dev, of_clk_hw_onecell_get,
+					   &meson8b_hw_onecell_data);
 }
 
 static const struct of_device_id meson8b_clkc_match_table[] = {
-- 
2.14.3