From: Julia Lawall <Julia.Lawall@lip6.fr>
To: Kukjin Kim <kgene@kernel.org>
Cc: kernel-janitors@vger.kernel.org,
Krzysztof Kozlowski <krzk@kernel.org>,
"Rafael J. Wysocki" <rjw@rjwysocki.net>,
Viresh Kumar <viresh.kumar@linaro.org>,
linux-arm-kernel@lists.infradead.org,
linux-samsung-soc@vger.kernel.org, linux-pm@vger.kernel.org,
linux-kernel@vger.kernel.org
Subject: [PATCH v2] cpufreq: s5pv210: add missing of_node_put
Date: Fri, 21 Jul 2017 21:53:30 +0200 [thread overview]
Message-ID: <1500666810-21841-1-git-send-email-Julia.Lawall@lip6.fr> (raw)
for_each_compatible_node performs an of_node_get on each iteration, so a
return from the loop requires an of_node_put.
The semantic patch that fixes this problem is as follows
(http://coccinelle.lip6.fr):
// <smpl>
@@
local idexpression n;
expression e,e1,e2;
statement S;
iterator i1;
iterator name for_each_compatible_node;
@@
for_each_compatible_node(n,e1,e2) {
...
(
of_node_put(n);
|
e = n
|
return n;
|
i1(...,n,...) S
|
+ of_node_put(n);
? return ...;
)
...
}
// </smpl>
Additionally, call of_node_put on the previous value of np, obtained from
of_find_compatible_node, that is no longer accessible at the point of the
for_each_compatible_node.
Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr>
---
v2: add the of_node_put for the call to of_find_compatible_node as well.
drivers/cpufreq/s5pv210-cpufreq.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/drivers/cpufreq/s5pv210-cpufreq.c b/drivers/cpufreq/s5pv210-cpufreq.c
index f82074e..5d31c2d 100644
--- a/drivers/cpufreq/s5pv210-cpufreq.c
+++ b/drivers/cpufreq/s5pv210-cpufreq.c
@@ -602,6 +602,7 @@ static int s5pv210_cpufreq_probe(struct platform_device *pdev)
}
clk_base = of_iomap(np, 0);
+ of_node_put(np);
if (!clk_base) {
pr_err("%s: failed to map clock registers\n", __func__);
return -EFAULT;
@@ -612,6 +613,7 @@ static int s5pv210_cpufreq_probe(struct platform_device *pdev)
if (id < 0 || id >= ARRAY_SIZE(dmc_base)) {
pr_err("%s: failed to get alias of dmc node '%s'\n",
__func__, np->name);
+ of_node_put(np);
return id;
}
@@ -619,6 +621,7 @@ static int s5pv210_cpufreq_probe(struct platform_device *pdev)
if (!dmc_base[id]) {
pr_err("%s: failed to map dmc%d registers\n",
__func__, id);
+ of_node_put(np);
return -EFAULT;
}
}
WARNING: multiple messages have this Message-ID (diff)
From: Julia Lawall <Julia.Lawall@lip6.fr>
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH v2] cpufreq: s5pv210: add missing of_node_put
Date: Fri, 21 Jul 2017 19:53:30 +0000 [thread overview]
Message-ID: <1500666810-21841-1-git-send-email-Julia.Lawall@lip6.fr> (raw)
for_each_compatible_node performs an of_node_get on each iteration, so a
return from the loop requires an of_node_put.
The semantic patch that fixes this problem is as follows
(http://coccinelle.lip6.fr):
// <smpl>
@@
local idexpression n;
expression e,e1,e2;
statement S;
iterator i1;
iterator name for_each_compatible_node;
@@
for_each_compatible_node(n,e1,e2) {
...
(
of_node_put(n);
|
e = n
|
return n;
|
i1(...,n,...) S
|
+ of_node_put(n);
? return ...;
)
...
}
// </smpl>
Additionally, call of_node_put on the previous value of np, obtained from
of_find_compatible_node, that is no longer accessible at the point of the
for_each_compatible_node.
Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr>
---
v2: add the of_node_put for the call to of_find_compatible_node as well.
drivers/cpufreq/s5pv210-cpufreq.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/drivers/cpufreq/s5pv210-cpufreq.c b/drivers/cpufreq/s5pv210-cpufreq.c
index f82074e..5d31c2d 100644
--- a/drivers/cpufreq/s5pv210-cpufreq.c
+++ b/drivers/cpufreq/s5pv210-cpufreq.c
@@ -602,6 +602,7 @@ static int s5pv210_cpufreq_probe(struct platform_device *pdev)
}
clk_base = of_iomap(np, 0);
+ of_node_put(np);
if (!clk_base) {
pr_err("%s: failed to map clock registers\n", __func__);
return -EFAULT;
@@ -612,6 +613,7 @@ static int s5pv210_cpufreq_probe(struct platform_device *pdev)
if (id < 0 || id >= ARRAY_SIZE(dmc_base)) {
pr_err("%s: failed to get alias of dmc node '%s'\n",
__func__, np->name);
+ of_node_put(np);
return id;
}
@@ -619,6 +621,7 @@ static int s5pv210_cpufreq_probe(struct platform_device *pdev)
if (!dmc_base[id]) {
pr_err("%s: failed to map dmc%d registers\n",
__func__, id);
+ of_node_put(np);
return -EFAULT;
}
}
WARNING: multiple messages have this Message-ID (diff)
From: Julia.Lawall@lip6.fr (Julia Lawall)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH v2] cpufreq: s5pv210: add missing of_node_put
Date: Fri, 21 Jul 2017 21:53:30 +0200 [thread overview]
Message-ID: <1500666810-21841-1-git-send-email-Julia.Lawall@lip6.fr> (raw)
for_each_compatible_node performs an of_node_get on each iteration, so a
return from the loop requires an of_node_put.
The semantic patch that fixes this problem is as follows
(http://coccinelle.lip6.fr):
// <smpl>
@@
local idexpression n;
expression e,e1,e2;
statement S;
iterator i1;
iterator name for_each_compatible_node;
@@
for_each_compatible_node(n,e1,e2) {
...
(
of_node_put(n);
|
e = n
|
return n;
|
i1(...,n,...) S
|
+ of_node_put(n);
? return ...;
)
...
}
// </smpl>
Additionally, call of_node_put on the previous value of np, obtained from
of_find_compatible_node, that is no longer accessible at the point of the
for_each_compatible_node.
Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr>
---
v2: add the of_node_put for the call to of_find_compatible_node as well.
drivers/cpufreq/s5pv210-cpufreq.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/drivers/cpufreq/s5pv210-cpufreq.c b/drivers/cpufreq/s5pv210-cpufreq.c
index f82074e..5d31c2d 100644
--- a/drivers/cpufreq/s5pv210-cpufreq.c
+++ b/drivers/cpufreq/s5pv210-cpufreq.c
@@ -602,6 +602,7 @@ static int s5pv210_cpufreq_probe(struct platform_device *pdev)
}
clk_base = of_iomap(np, 0);
+ of_node_put(np);
if (!clk_base) {
pr_err("%s: failed to map clock registers\n", __func__);
return -EFAULT;
@@ -612,6 +613,7 @@ static int s5pv210_cpufreq_probe(struct platform_device *pdev)
if (id < 0 || id >= ARRAY_SIZE(dmc_base)) {
pr_err("%s: failed to get alias of dmc node '%s'\n",
__func__, np->name);
+ of_node_put(np);
return id;
}
@@ -619,6 +621,7 @@ static int s5pv210_cpufreq_probe(struct platform_device *pdev)
if (!dmc_base[id]) {
pr_err("%s: failed to map dmc%d registers\n",
__func__, id);
+ of_node_put(np);
return -EFAULT;
}
}
next reply other threads:[~2017-07-21 20:18 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-07-21 19:53 Julia Lawall [this message]
2017-07-21 19:53 ` [PATCH v2] cpufreq: s5pv210: add missing of_node_put Julia Lawall
2017-07-21 19:53 ` Julia Lawall
2017-07-24 8:52 ` Viresh Kumar
2017-07-24 8:52 ` Viresh Kumar
2017-07-24 8:52 ` Viresh Kumar
2017-07-27 23:54 ` Rafael J. Wysocki
2017-07-27 23:54 ` Rafael J. Wysocki
2017-07-27 23:54 ` Rafael J. Wysocki
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