linux-kernel - Re: [PATCH] driver core: silence device link messages unless debugging

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Date:   Thu, 10 Jan 2019 16:56:10 -0800
From:   Kevin Hilman <khilman@...libre.com>
To:     Jerome Brunet <jbrunet@...libre.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:     Jerome Brunet <jbrunet@...libre.com>,
        "Rafael J . Wysocki" <rafael@...nel.org>,
        linux-kernel@...r.kernel.org, linux-amlogic@...ts.infradead.org
Subject: Re: [PATCH] driver core: silence device link messages unless debugging

Jerome Brunet <jbrunet@...libre.com> writes:

> On platforms making a fair use of regulators, the dev_info() messages
> coming from the device link function are a bit too verbose. The amount
> of message will increase further with the clock framework joining the
> device link party.
>
> These messages looks valuable for people debugging device link related
> issues, so dev_dbg() looks more appropriate than dev_info().
>
> Signed-off-by: Jerome Brunet <jbrunet@...libre.com>

Acked-by: Kevin Hilman <khilman@...libre.com>

> ---
>  drivers/base/core.c | 6 +++---
>  1 file changed, 3 insertions(+), 3 deletions(-)
>
> diff --git a/drivers/base/core.c b/drivers/base/core.c
> index 04bbcd779e11..8d330f921ad7 100644
> --- a/drivers/base/core.c
> +++ b/drivers/base/core.c
> @@ -301,7 +301,7 @@ struct device_link *device_link_add(struct device *consumer,
>  	list_add_tail_rcu(&link->s_node, &supplier->links.consumers);
>  	list_add_tail_rcu(&link->c_node, &consumer->links.suppliers);
>  
> -	dev_info(consumer, "Linked as a consumer to %s\n", dev_name(supplier));
> +	dev_dbg(consumer, "Linked as a consumer to %s\n", dev_name(supplier));
>  
>   out:
>  	device_pm_unlock();
> @@ -327,8 +327,8 @@ static void __device_link_del(struct kref *kref)
>  {
>  	struct device_link *link = container_of(kref, struct device_link, kref);
>  
> -	dev_info(link->consumer, "Dropping the link to %s\n",
> -		 dev_name(link->supplier));
> +	dev_dbg(link->consumer, "Dropping the link to %s\n",
> +		dev_name(link->supplier));
>  
>  	if (link->flags & DL_FLAG_PM_RUNTIME)
>  		pm_runtime_drop_link(link->consumer);
> -- 
> 2.19.2