linux-kernel - Re: [PATCH] cpufreq: Fix inconsistency in error messages of cpufreq

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 for Android: free password hash cracker in your pocket

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

Message-ID: <b7be717c-41d8-bbbf-3e97-3799948ab757@huawei.com>
Date:   Mon, 28 Aug 2023 20:31:07 +0800
From:   "Liao, Chang" <liaochang1@...wei.com>
To:     Viresh Kumar <viresh.kumar@...aro.org>
CC:     <rafael@...nel.org>, <linux-pm@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] cpufreq: Fix inconsistency in error messages of
 cpufreq_resume/suspend()

Hi, Viresh

在 2023/8/28 15:00, Viresh Kumar 写道:
> On 26-08-23, 09:52, Liao Chang wrote:
>> The error message printed by cpufreq_resume() currently is the pointer
>> value of the policy structure, while the error message printed by
>> cpufreq_suspend() is the name of the driver. In order to make the error
>> messages more consistent and easier to understand, change the error
>> message printed by cpufreq_resume() to the name of driver.
> 
> Also I don't think printing kernel addresses will help much anyway,
> and it also may not be recommended.
> 
>> Signed-off-by: Liao Chang <liaochang1@...wei.com>
>> ---
>>  drivers/cpufreq/cpufreq.c | 4 ++--
>>  1 file changed, 2 insertions(+), 2 deletions(-)
>>
>> diff --git a/drivers/cpufreq/cpufreq.c b/drivers/cpufreq/cpufreq.c
>> index c835ff117386..2199c04ac64d 100644
>> --- a/drivers/cpufreq/cpufreq.c
>> +++ b/drivers/cpufreq/cpufreq.c
>> @@ -1943,8 +1943,8 @@ void cpufreq_resume(void)
>>  
>>  	for_each_active_policy(policy) {
>>  		if (cpufreq_driver->resume && cpufreq_driver->resume(policy)) {
>> -			pr_err("%s: Failed to resume driver: %p\n", __func__,
>> -				policy);
>> +			pr_err("%s: Failed to resume driver: %s\n", __func__,
>> +				cpufreq_driver->name);
>>  		} else if (has_target()) {
>>  			down_write(&policy->rwsem);
>>  			ret = cpufreq_start_governor(policy);
> 
> There is another print down here which prints policy, please update
> that too in a similar way.

What about printing message like this below when cpufreq_start_governor() fails.

diff --git a/drivers/cpufreq/cpufreq.c b/drivers/cpufreq/cpufreq.c
index 50bbc969ffe5..b78b509429a6 100644
--- a/drivers/cpufreq/cpufreq.c
+++ b/drivers/cpufreq/cpufreq.c
@@ -1943,16 +1943,16 @@ void cpufreq_resume(void)

                        if (ret)
-                               pr_err("%s: Failed to start governor for policy: %p\n",
-                                      __func__, policy);
+                               pr_err("%s: Failed to start governor for policy%u\n",
+                                      __func__, policy->cpu);
                }
        }
 }



> 

-- 
BR
Liao, Chang