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Wed, 29 Apr 2026 14:49:38 -0700 (PDT) Message-ID: <2260c470-0fb2-475a-b415-e0f485ebe619@gmail.com> Date: Thu, 30 Apr 2026 06:49:35 +0900 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v2 2/4] PM / devfreq: Fix available_governors_show() when no governor is set Content-Language: ko To: Yaxiong Tian , myungjoo.ham@samsung.com, kyungmin.park@samsung.com, cw00.choi@samsung.com, zhanjie9@hisilicon.com, nm@ti.com Cc: linux-pm@vger.kernel.org, linux-kernel@vger.kernel.org References: <20260401032838.66168-1-tianyaxiong@kylinos.cn> <20260401033055.67608-1-tianyaxiong@kylinos.cn> From: Choi Chanwoo In-Reply-To: <20260401033055.67608-1-tianyaxiong@kylinos.cn> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit 2026-04-01 PM 12:30에 Yaxiong Tian 이(가) 쓴 글: > Since devfreq_remove_governor() may clear the device's current governor > in certain situations, while governors actually exist independently of > the device, directly returning EINVAL in this case is inaccurate. > > To fix this issue, remove this check and use df->governor for validity > verification in the following code. > > Fixes: 483d557ee9a3 ("PM / devfreq: Clean up the devfreq instance name in sysfs attr") > Signed-off-by: Yaxiong Tian > --- > drivers/devfreq/devfreq.c | 5 +---- > 1 file changed, 1 insertion(+), 4 deletions(-) > > diff --git a/drivers/devfreq/devfreq.c b/drivers/devfreq/devfreq.c > index 994984f7b6e1..2977b07be939 100644 > --- a/drivers/devfreq/devfreq.c > +++ b/drivers/devfreq/devfreq.c > @@ -1468,16 +1468,13 @@ static ssize_t available_governors_show(struct device *d, > struct devfreq *df = to_devfreq(d); > ssize_t count = 0; > > - if (!df->governor) > - return -EINVAL; > - > mutex_lock(&devfreq_list_lock); > > /* > * The devfreq with immutable governor (e.g., passive) shows > * only own governor. > */ > - if (IS_SUPPORTED_FLAG(df->governor->flags, IMMUTABLE)) { > + if (df->governor && IS_SUPPORTED_FLAG(df->governor->flags, IMMUTABLE)) { > count = scnprintf(&buf[count], DEVFREQ_NAME_LEN, > "%s ", df->governor->name); > /* Hi, Applied it. Thanks Thanks, Chanwoo Choi