From: Julia Lawall <Julia.Lawall@lip6.fr>
To: Peter De Schrijver <pdeschrijver@nvidia.com>
Cc: kernel-janitors@vger.kernel.org,
Prashant Gaikwad <pgaikwad@nvidia.com>,
Michael Turquette <mturquette@baylibre.com>,
Stephen Boyd <sboyd@codeaurora.org>,
Stephen Warren <swarren@wwwdotorg.org>,
Thierry Reding <thierry.reding@gmail.com>,
Alexandre Courbot <gnurou@gmail.com>,
linux-clk@vger.kernel.org, linux-tegra@vger.kernel.org,
linux-kernel@vger.kernel.org,
Russell King - ARM Linux <linux@arm.linux.org.uk>,
Thomas Petazzoni <thomas.petazzoni@free-electrons.com>,
Andrew Lunn <andrew@lunn.ch>, Bjorn Helgaas <bhelgaas@google.com>,
Jason Cooper <jason@lakedaemon.net>
Subject: [PATCH 2/2] clk: tegra: delete unneeded of_node_put
Date: Fri, 9 Oct 2015 19:47:41 +0200 [thread overview]
Message-ID: <1444412861-2580-3-git-send-email-Julia.Lawall@lip6.fr> (raw)
In-Reply-To: <1444412861-2580-1-git-send-email-Julia.Lawall@lip6.fr>
for_each_child_of_node performs an of_node_put on each iteration, so
putting an of_node_put before a continue results in a double put.
The semantic match that finds this problem is as follows
(http://coccinelle.lip6.fr):
// <smpl>
@@
expression root,e;
local idexpression child;
iterator name for_each_child_of_node;
@@
for_each_child_of_node(root, child) {
... when != of_node_get(child)
* of_node_put(child);
...
* continue;
}
// </smpl>
Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr>
---
drivers/clk/tegra/clk-emc.c | 4 +---
1 file changed, 1 insertion(+), 3 deletions(-)
diff --git a/drivers/clk/tegra/clk-emc.c b/drivers/clk/tegra/clk-emc.c
index 138a94b..e1fe8f3 100644
--- a/drivers/clk/tegra/clk-emc.c
+++ b/drivers/clk/tegra/clk-emc.c
@@ -491,10 +491,8 @@ struct clk *tegra_clk_register_emc(void __iomem *base, struct device_node *np,
for_each_child_of_node(np, node) {
err = of_property_read_u32(node, "nvidia,ram-code",
&node_ram_code);
- if (err) {
- of_node_put(node);
+ if (err)
continue;
- }
/*
* Store timings for all ram codes as we cannot read the
next prev parent reply other threads:[~2015-10-09 17:58 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-10-09 17:47 [PATCH 0/2] delete unneeded of_node_put Julia Lawall
2015-10-09 17:47 ` [PATCH 1/2] memory: tegra: " Julia Lawall
2016-06-14 9:38 ` Thierry Reding
2015-10-09 17:47 ` Julia Lawall [this message]
2015-10-12 18:52 ` [PATCH 2/2] clk: " Stephen Boyd
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