linux-kernel - Re: [PATCH 1/1] watchdog: stm32_iwdg: don't print an error on probe deferral

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Date:   Fri, 6 Nov 2020 05:06:44 -0800
From:   Guenter Roeck <linux@...ck-us.net>
To:     Christophe Roullier <christophe.roullier@...com>
Cc:     wim@...ux-watchdog.org, mcoquelin.stm32@...il.com,
        alexandre.torgue@...com, linux-watchdog@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        linux-stm32@...md-mailman.stormreply.com,
        linux-arm-kernel@...ts.infradead.org,
        Etienne Carriere <etienne.carriere@...com>
Subject: Re: [PATCH  1/1] watchdog: stm32_iwdg: don't print an error on probe
 deferral

On Fri, Nov 06, 2020 at 10:46:27AM +0100, Christophe Roullier wrote:
> From: Etienne Carriere <etienne.carriere@...com>
> 
> Do not print an error trace when deferring probe for clock resources.
> 
> Signed-off-by: Etienne Carriere <etienne.carriere@...com>
> Signed-off-by: Christophe Roullier <christophe.roullier@...com>
> ---
>  drivers/watchdog/stm32_iwdg.c | 6 ++++--
>  1 file changed, 4 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/watchdog/stm32_iwdg.c b/drivers/watchdog/stm32_iwdg.c
> index 25188d6bbe15..1b71c205cee0 100644
> --- a/drivers/watchdog/stm32_iwdg.c
> +++ b/drivers/watchdog/stm32_iwdg.c
> @@ -163,7 +163,8 @@ static int stm32_iwdg_clk_init(struct platform_device *pdev,
>  
>  	wdt->clk_lsi = devm_clk_get(dev, "lsi");
>  	if (IS_ERR(wdt->clk_lsi)) {
> -		dev_err(dev, "Unable to get lsi clock\n");
> +		if (PTR_ERR(wdt->clk_lsi) != -EPROBE_DEFER)
> +			dev_err(dev, "Unable to get lsi clock\n");
>  		return PTR_ERR(wdt->clk_lsi);

I would suggest to use
		return dev_err_probe(dev, PTR_ERR(wdt->clk_lsi), "Unable to get lsi clock\n");

Guenter

>  	}
>  
> @@ -171,7 +172,8 @@ static int stm32_iwdg_clk_init(struct platform_device *pdev,
>  	if (wdt->data->has_pclk) {
>  		wdt->clk_pclk = devm_clk_get(dev, "pclk");
>  		if (IS_ERR(wdt->clk_pclk)) {
> -			dev_err(dev, "Unable to get pclk clock\n");
> +			if (PTR_ERR(wdt->clk_pclk) != -EPROBE_DEFER)
> +				dev_err(dev, "Unable to get pclk clock\n");
>  			return PTR_ERR(wdt->clk_pclk);
>  		}
>  
> -- 
> 2.17.1
>