linux-kernel - Re: [PATCH] i2c: i2c-mux-gpio: Change log level to debug for probe deferrals

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Date:	Thu, 26 Mar 2015 10:09:51 +0100
From:	Alexander Sverdlin <alexander.sverdlin@...ia.com>
To:	Ioan Nicu <ioan.nicu.ext@....com>,
	Peter Korsgaard <peter.korsgaard@...co.com>,
	Wolfram Sang <wsa@...-dreams.de>, linux-i2c@...r.kernel.org,
	linux-kernel@...r.kernel.org
CC:	Mathias Rulf <mathias.rulf@...ia.com>
Subject: Re: [PATCH] i2c: i2c-mux-gpio: Change log level to debug for probe
 deferrals

On 25/03/15 18:43, Ioan Nicu wrote:
> Probe deferral is not an error case. It happens only when
> the necessary dependencies are not there yet.
> 
> The driver core is already printing a message when a driver
> requests probe deferral, so this can be traced in the logs
> without these error prints.
> 
> This patch changes the error messages from these deferral cases
> to debug messages.
> 
> Signed-off-by: Ionut Nicu <ioan.nicu.ext@...ia.com>

Acked-by: Alexander Sverdlin <alexander.sverdlin@...ia.com>

> ---
>  drivers/i2c/muxes/i2c-mux-gpio.c |    4 ++--
>  1 files changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/i2c/muxes/i2c-mux-gpio.c b/drivers/i2c/muxes/i2c-mux-gpio.c
> index f5798eb..9f1cfca 100644
> --- a/drivers/i2c/muxes/i2c-mux-gpio.c
> +++ b/drivers/i2c/muxes/i2c-mux-gpio.c
> @@ -77,7 +77,7 @@ static int i2c_mux_gpio_probe_dt(struct gpiomux *mux,
>         }
>         adapter = of_find_i2c_adapter_by_node(adapter_np);
>         if (!adapter) {
> -               dev_err(&pdev->dev, "Cannot find parent bus\n");
> +               dev_dbg(&pdev->dev, "Cannot find parent bus\n");
>                 return -EPROBE_DEFER;
>         }
>         mux->data.parent = i2c_adapter_id(adapter);
> @@ -178,7 +178,7 @@ static int i2c_mux_gpio_probe(struct platform_device *pdev)
>  
>         parent = i2c_get_adapter(mux->data.parent);
>         if (!parent) {
> -               dev_err(&pdev->dev, "Parent adapter (%d) not found\n",
> +               dev_dbg(&pdev->dev, "Parent adapter (%d) not found\n",
>                         mux->data.parent);
>                 return -EPROBE_DEFER;
>         }

-- 
Best regards,
Alexander Sverdlin.
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