[5/7] cpufreq/pasemi: fix possible object reference leak
diff mbox series

Message ID 1554082674-2049-6-git-send-email-wen.yang99@zte.com.cn
State Accepted
Delegated to: viresh kumar
Headers show
Series
  • [1/7] cpufreq: ap806: fix possible object reference leak
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Commit Message

Wen Yang April 1, 2019, 1:37 a.m. UTC
The call to of_get_cpu_node returns a node pointer with refcount
incremented thus it must be explicitly decremented after the last
usage.

Detected by coccinelle with the following warnings:
./drivers/cpufreq/pasemi-cpufreq.c:212:1-7: ERROR: missing of_node_put; acquired a node pointer with refcount incremented on line 147, but without a corresponding object release within this function.
./drivers/cpufreq/pasemi-cpufreq.c:220:1-7: ERROR: missing of_node_put; acquired a node pointer with refcount incremented on line 147, but without a corresponding object release within this function.

Signed-off-by: Wen Yang <wen.yang99@zte.com.cn>
Cc: "Rafael J. Wysocki" <rjw@rjwysocki.net>
Cc: Viresh Kumar <viresh.kumar@linaro.org>
Cc: linuxppc-dev@lists.ozlabs.org
Cc: linux-pm@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
---
 drivers/cpufreq/pasemi-cpufreq.c | 1 +
 1 file changed, 1 insertion(+)

Comments

Markus Elfring April 3, 2019, 2:23 p.m. UTC | #1
> @@ -146,6 +146,7 @@  static int pas_cpufreq_cpu_init(struct cpufreq_policy *policy)
>
>  	cpu = of_get_cpu_node(policy->cpu, NULL);
>
> +	of_node_put(cpu);
>  	if (!cpu)
>  		goto out;

Can the statement “return -ENODEV” be nicer as exception handling
in the if branch of this source code place?
https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/tree/drivers/cpufreq/pasemi-cpufreq.c?id=bf97b82f37c6d90e16de001d0659644c57fa490d#n137

Regards,
Markus
Dan Carpenter April 3, 2019, 3:31 p.m. UTC | #2
On Wed, Apr 03, 2019 at 04:23:54PM +0200, Markus Elfring wrote:
> > @@ -146,6 +146,7 @@  static int pas_cpufreq_cpu_init(struct cpufreq_policy *policy)
> >
> >  	cpu = of_get_cpu_node(policy->cpu, NULL);
> >
> > +	of_node_put(cpu);
> >  	if (!cpu)
> >  		goto out;
> 
> Can the statement “return -ENODEV” be nicer as exception handling
> in the if branch of this source code place?
> https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/tree/drivers/cpufreq/pasemi-cpufreq.c?id=bf97b82f37c6d90e16de001d0659644c57fa490d#n137
> 

Why am I only receiving only one side of this conversation?

I don't know why you're responding to...  It's not required to fix/change
unrelated style choices.  If people want, they can just focus on their
own thing.

regards,
dan carpenter

Patch
diff mbox series

diff --git a/drivers/cpufreq/pasemi-cpufreq.c b/drivers/cpufreq/pasemi-cpufreq.c
index 75dfbd2..c7710c1 100644
--- a/drivers/cpufreq/pasemi-cpufreq.c
+++ b/drivers/cpufreq/pasemi-cpufreq.c
@@ -146,6 +146,7 @@  static int pas_cpufreq_cpu_init(struct cpufreq_policy *policy)
 
 	cpu = of_get_cpu_node(policy->cpu, NULL);
 
+	of_node_put(cpu);
 	if (!cpu)
 		goto out;