linux-kernel - RE: [PATCH] devfreq: Make log message more explicit when devfreq device already exists

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Date:   Thu, 19 Sep 2019 13:53:14 +0900
From:   MyungJoo Ham <myungjoo.ham@...sung.com>
To:     Matthias Kaehlcke <mka@...omium.org>
CC:     Kyungmin Park <kyungmin.park@...sung.com>,
        Chanwoo Choi <cw00.choi@...sung.com>,
        "linux-pm@...r.kernel.org" <linux-pm@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: RE: [PATCH] devfreq: Make log message more explicit when devfreq
 device already exists

>Before creating a new devfreq device devfreq_add_device() checks
>if there is already a devfreq dev associated with the requesting
>device (parent). If that's the case the function rejects to create
>another devfreq dev for that parent and logs an error. The error
>message is very unspecific, make it a bit more explicit.
>
>Signed-off-by: Matthias Kaehlcke <mka@...omium.org>
>---
> drivers/devfreq/devfreq.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
>diff --git a/drivers/devfreq/devfreq.c b/drivers/devfreq/devfreq.c
>index ab22bf8a12d6..0e2dd734ab58 100644
>--- a/drivers/devfreq/devfreq.c
>+++ b/drivers/devfreq/devfreq.c
>@@ -625,7 +625,7 @@ struct devfreq *devfreq_add_device(struct device *dev,
> 	devfreq = find_device_devfreq(dev);
> 	mutex_unlock(&devfreq_list_lock);
> 	if (!IS_ERR(devfreq)) {
>-		dev_err(dev, "%s: Unable to create devfreq for the device.\n",
>+		dev_err(dev, "%s: devfreq device already exists!\n",

Yes, this is more helpful! Thanks!

Acked-by: MyungJoo Ham <myungjoo.ham@...sung.com>