From: "Rafael J. Wysocki" <rafael@kernel.org>
To: Andy Shevchenko <andy.shevchenko@gmail.com>
Cc: "Rafael J. Wysocki" <rjw@rjwysocki.net>,
ramesh.thomas@intel.com, Linux PM <linux-pm@vger.kernel.org>,
LKML <linux-kernel@vger.kernel.org>,
Reinette Chatre <reinette.chatre@intel.com>,
Alex Shi <alex.shi@linaro.org>,
Ulf Hansson <ulf.hansson@linaro.org>
Subject: Re: [PATCH] PM / QoS: Fix device resume latency PM QoS
Date: Thu, 26 Oct 2017 10:38:10 +0200 [thread overview]
Message-ID: <CAJZ5v0hgnq78z+=msaJjJmSFSHPM06MZ2_iRzixtRRDGxK-yBg@mail.gmail.com> (raw)
In-Reply-To: <CAHp75VdY=q4A2cam=xg17+pOPgDbtYRdVdQvEjO7OGjG6m947Q@mail.gmail.com>
On Wed, Oct 25, 2017 at 10:06 PM, Andy Shevchenko
<andy.shevchenko@gmail.com> wrote:
> On Tue, Oct 24, 2017 at 11:49 AM, Rafael J. Wysocki <rjw@rjwysocki.net> wrote:
>> On Tuesday, October 24, 2017 7:54:09 AM CEST Ramesh Thomas wrote:
>>> On 2017-10-20 at 13:27:34 +0200, Rafael J. Wysocki wrote:
>
>>> > static ssize_t pm_qos_resume_latency_store(struct device *dev,
>>> > @@ -228,11 +235,19 @@ static ssize_t pm_qos_resume_latency_sto
>>> > s32 value;
>>> > int ret;
>
>>> > + if (!kstrtos32(buf, 0, &value)) {
>>> > + /*
>>> > + * Prevent users from writing negative or "no constraint" values
>>> > + * directly.
>>> > + */
>>> > + if (value < 0 || value == PM_QOS_RESUME_LATENCY_NO_CONSTRAINT)
>>> > + return -EINVAL;
>
>>> > + if (value == 0)
>>> > + value = PM_QOS_RESUME_LATENCY_NO_CONSTRAINT;
>>> > + } else if (!strcmp(buf, "n/a") || !strcmp(buf, "n/a\n")) {
>>>
>>> Can the 2 checks for "n/a" be combined by checking first 3 characters?
>>
>> No, because "n/asomething" would then match too.
>
> If I don't missed anything, kernfs is aware of \n which means the
> first check is enough.
> Am I correct?
I'm not sure, honestly. :-)
Anyway, that can be fixed up later and the bug in question is rather urgent.
Thanks,
Rafael
next prev parent reply other threads:[~2017-10-26 8:38 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-10-20 11:27 [PATCH] PM / QoS: Fix device resume latency PM QoS Rafael J. Wysocki
2017-10-20 22:04 ` Reinette Chatre
2017-10-23 5:12 ` Alex Shi
2017-10-24 5:54 ` Ramesh Thomas
2017-10-24 8:49 ` Rafael J. Wysocki
2017-10-24 11:23 ` Rafael J. Wysocki
2017-10-24 11:35 ` [PATCH v2] " Rafael J. Wysocki
2017-10-25 7:16 ` Ramesh Thomas
2017-10-26 2:00 ` Ramesh Thomas
2017-10-26 8:44 ` Rafael J. Wysocki
2017-10-25 7:27 ` [PATCH] " Ramesh Thomas
2017-10-25 16:28 ` Rafael J. Wysocki
2017-10-26 1:41 ` Ramesh Thomas
2017-10-25 20:06 ` Andy Shevchenko
2017-10-26 8:38 ` Rafael J. Wysocki [this message]
2017-10-27 18:52 ` Andy Shevchenko
2017-10-27 19:16 ` Rafael J. Wysocki
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